Don’t see the right role but still want to work at Ello? We’d love to hear from you. We’re always looking for exceptional people. If you don’t see an open role that matches your background, tell us what you’d want to do at Ello and why you’d be a great fit. We review every application and will reach out if there’s a match now or as new opportunities arise.
At Ello, diversity is a moral imperative and a competitive advantage. We do not discriminate based on race, religion, skin color, national origin, gender, sexual orientation, age, marital status, veteran status, or disability status. We plan and structure our interviews to assess skills and experience directly. If you need accommodations throughout the interview process, please contact recruiting@ello.com.
","descriptionPlain":"Don’t see the right role but still want to work at Ello? We’d love to hear from you. We’re always looking for exceptional people. If you don’t see an open role that matches your background, tell us what you’d want to do at Ello and why you’d be a great fit. We review every application and will reach out if there’s a match now or as new opportunities arise.\n\n\n\nAt Ello, diversity is a moral imperative and a competitive advantage. We do not discriminate based on race, religion, skin color, national origin, gender, sexual orientation, age, marital status, veteran status, or disability status. We plan and structure our interviews to assess skills and experience directly. If you need accommodations throughout the interview process, please contact recruiting@ello.com."},{"id":"f843ac3e-8106-4cb0-bb77-72caa489ab23","title":"AI/ML Engineer","department":"Engineering","team":"Engineering","employmentType":"FullTime","location":"San Francisco, CA","secondaryLocations":[],"publishedAt":"2026-05-28T14:43:41.651+00:00","isListed":true,"isRemote":null,"workplaceType":null,"address":{"postalAddress":{"addressRegion":"California","addressCountry":"USA","addressLocality":"San Francisco"}},"jobUrl":"https://jobs.ashbyhq.com/ello/f843ac3e-8106-4cb0-bb77-72caa489ab23","applyUrl":"https://jobs.ashbyhq.com/ello/f843ac3e-8106-4cb0-bb77-72caa489ab23/application","descriptionHtml":"Ello’s mission is to maximize the potential of every child, everywhere. To close that gap, we’re building the world’s first AI teacher: one that listens, speaks, adapts, and inspires, just like the best human educators.
Our first product, Read with Ello, has already helped hundreds of thousands of kids each week learn to read. It listens as they read aloud, offers support when they stumble, and generates magical, personalized stories. It works, and kids love it.
Now, we’re scaling that success into something even bigger: a complete AI teacher for all children. Our new app combines language, speech, and memory to deliver interactive learning for kids worldwide – check it out here. We’re moving fast: we ship weekly, test directly with kids, and push the boundaries of what AI can do in education.
We’re looking for an AI/ML Engineer to join our product engineering and applied research team. Our team operates at the intersection of research and production, solving open-ended problems while delivering real-world products. We use the best tool for the job, whether that’s a novel machine learning model or plain software engineering fundamentals.
You’re excited to build an AI product that pushes the boundaries of what’s possible in education. You believe that great products and research strengthen each other. You’ll thrive here if you enjoy shipping AI features into a real product, designing the evaluations that prove they work, and turning fuzzy product questions into measurable experiments. You’ll make an edit in your Jupyter notebook this week, deploy it on-device next week, and watch it bring smiles to kids’ faces a day later.
Help define the impact of AI on children’s education.
Own AI systems and features end-to-end: from identifying product opportunities, to building and operating research and evaluation systems, to shipping production improvements used by children worldwide.
Collaborate with learning experts and product engineers to build infrastructure measuring the educational quality, engagement, safety, latency, and behavior of an AI teacher
Design and improve the agent harness that powers Ello’s tutoring experience, including how the tutor decides what to teach next, when to intervene, and how to adapt to each child
Develop learner profiling and adaptation systems that build a model of each child – their strengths, gaps, pace, and engagement patterns – and use that model to drive instructional decisions
Develop feedback loops and data flywheels that continuously improve product quality through usage, evaluation, and experimentation
Experience: 3+ years of experience building AI products in an engineering or research role. You’ve worked in environments that require you to take a high level of ownership.
Software engineering fundamentals: You take pride in writing clean Python code that others can build upon. You’re able to get up-to-speed quickly on unfamiliar code, work well with other engineers of varying backgrounds, and debug complex systems. You can make technical decisions with incomplete information while still maintaining high engineering standards.
Evaluation and product improvement: You’ve built and operated evaluation or measurement systems, such as AI evals. You can own the loop from ambiguous product quality questions, to concrete metrics and research plans, back to production improvements.
Research and experimentation: You’re comfortable with experimental thinking and reasoning through how to build systems around improving a non-deterministic product, while the underlying AI foundations shift. You can think empirically, but also make good calls in the gray area when needing to weigh conflicting signals and move quickly.
Machine learning foundations: You’re able to read recent ML papers and implement parts of the stack – you don’t need deep model training expertise, but you do need to understand how they work and how to evaluate them. You have sufficient proficiency in applied mathematics and linear algebra to contribute to research discussions.
AI-forward workflow: you have a working practice of leveraging AI in your engineering workflows, and an active curiosity in how AI is transforming work.
Public projects that demonstrate technical creativity
Strong product intuition — you can tell what's worth measuring and what isn't
Depth in low-latency inference at scale
Experience with model training
Familiarity with speech systems
Have something to teach us
Have an urge to make a real impact on child development at scale
Take initiative and full ownership of their work
Prefer open and direct communication grounded in empathy to beating around the bush
Want to build meaningful relationships at work
Ello’s 5-person applied ML team includes some of the world’s foremost experts in their areas. We work on a broad range of machine learning problems across agent reliability, learner adaptation, evaluation, and multimodal perception – including building the world's best child speech recognition system, designed by co-authors of wav2vec. We collaborate closely with advisors from Stanford and top industry research labs (on a weekly basis, not in some hands-off way). We work in-person out of our San Francisco office and we’re big believers in face-to-face collaboration.
If you already have work authorization in the US, we're open to sponsorship depending on your situation. Our CTO and CEO have each gone through their own immigration journeys and are familiar with the challenges. We have successfully secured O-1 visas for Ello employees and retain top immigration counsel.
Ello is a public benefit corporation on a mission to maximize the potential of all children. We’re currently around 45 people, headquartered in San Francisco with another office in Nairobi, Kenya.
Our team has deep expertise in artificial intelligence, K-12 education, and child development across institutions such as Stanford, Berkeley, Google, Apple, and more. We were part of Y Combinator’s W20 batch and are funded by world-class investors including Goodwater Capital, Homebrew, Reed Hastings, Common Sense Growth, Ravensburger, Project A Ventures, Reach Capital, Khosla Ventures, WndrCo, Visible Ventures, and K9 Ventures.
We’re a small, collaborative team that takes each other’s voices very seriously. Because our mission is to support all children, it is critical that our team is representative of the communities we work in; we place significant emphasis on ensuring diversity in our team and inclusion in our culture.
We feel enormously privileged to be one of the few companies that has the opportunity to take a shot at truly revolutionizing education with AI at this inflection point in technology. We don’t take it for granted, so we work quite hard to turn that vision into reality with urgency. We want to create an environment in which we can all be our best selves, use our strengths to take Ello forward, and develop our own skills. We want to have fun while working hard to do impactful things that we’re proud of – and we believe it’s possible to do both.
At Ello, diversity is a moral imperative and a competitive advantage. We do not discriminate based on race, religion, skin color, national origin, gender, sexual orientation, age, marital status, veteran status, or disability status. We plan and structure our interviews to assess skills and experience directly. If you need accommodations throughout the interview process, please contact recruiting@ello.com.
","descriptionPlain":"Ello’s mission is to maximize the potential of every child, everywhere. To close that gap, we’re building the world’s first AI teacher: one that listens, speaks, adapts, and inspires, just like the best human educators.\n\n \n\nOur first product, Read with Ello, has already helped hundreds of thousands of kids each week learn to read. It listens as they read aloud, offers support when they stumble, and generates magical, personalized stories. It works, and kids love it.\n\n \n\nNow, we’re scaling that success into something even bigger: a complete AI teacher for all children. Our new app combines language, speech, and memory to deliver interactive learning for kids worldwide – check it out here https://new.ello.com/. We’re moving fast: we ship weekly, test directly with kids, and push the boundaries of what AI can do in education.\n\n \n\n\nABOUT THE ROLE\n\nWe’re looking for an AI/ML Engineer to join our product engineering and applied research team. Our team operates at the intersection of research and production, solving open-ended problems while delivering real-world products. We use the best tool for the job, whether that’s a novel machine learning model or plain software engineering fundamentals.\n\n\n\nYou’re excited to build an AI product that pushes the boundaries of what’s possible in education. You believe that great products and research strengthen each other. You’ll thrive here if you enjoy shipping AI features into a real product, designing the evaluations that prove they work, and turning fuzzy product questions into measurable experiments. You’ll make an edit in your Jupyter notebook this week, deploy it on-device next week, and watch it bring smiles to kids’ faces a day later.\n\n\n\n\nWHAT YOU’LL DO\n\n - Help define the impact of AI on children’s education.\n\n - Own AI systems and features end-to-end: from identifying product opportunities, to building and operating research and evaluation systems, to shipping production improvements used by children worldwide.\n\n - Collaborate with learning experts and product engineers to build infrastructure measuring the educational quality, engagement, safety, latency, and behavior of an AI teacher\n\n - Design and improve the agent harness that powers Ello’s tutoring experience, including how the tutor decides what to teach next, when to intervene, and how to adapt to each child\n\n - Develop learner profiling and adaptation systems that build a model of each child – their strengths, gaps, pace, and engagement patterns – and use that model to drive instructional decisions\n\n - Develop feedback loops and data flywheels that continuously improve product quality through usage, evaluation, and experimentation\n\n\n\n\nABOUT YOU\n\n - Experience: 3+ years of experience building AI products in an engineering or research role. You’ve worked in environments that require you to take a high level of ownership.\n\n - Software engineering fundamentals: You take pride in writing clean Python code that others can build upon. You’re able to get up-to-speed quickly on unfamiliar code, work well with other engineers of varying backgrounds, and debug complex systems. You can make technical decisions with incomplete information while still maintaining high engineering standards.\n\n - Evaluation and product improvement: You’ve built and operated evaluation or measurement systems, such as AI evals. You can own the loop from ambiguous product quality questions, to concrete metrics and research plans, back to production improvements.\n\n - Research and experimentation: You’re comfortable with experimental thinking and reasoning through how to build systems around improving a non-deterministic product, while the underlying AI foundations shift. You can think empirically, but also make good calls in the gray area when needing to weigh conflicting signals and move quickly.\n\n - Machine learning foundations: You’re able to read recent ML papers and implement parts of the stack – you don’t need deep model training expertise, but you do need to understand how they work and how to evaluate them. You have sufficient proficiency in applied mathematics and linear algebra to contribute to research discussions.\n\n - AI-forward workflow: you have a working practice of leveraging AI in your engineering workflows, and an active curiosity in how AI is transforming work.\n\n\n\n\n\nBONUS POINTS\n\n - Public projects that demonstrate technical creativity\n\n - Strong product intuition — you can tell what's worth measuring and what isn't\n\n - Depth in low-latency inference at scale\n\n - Experience with model training\n\n - Familiarity with speech systems\n\n\n\n\nWE LOOK FOR CANDIDATES WHO\n\n - Have something to teach us\n\n - Have an urge to make a real impact on child development at scale\n\n - Take initiative and full ownership of their work\n\n - Prefer open and direct communication grounded in empathy to beating around the bush\n\n - Want to build meaningful relationships at work\n\n\n\n\nWHO YOU’LL BE JOINING\n\nEllo’s 5-person applied ML team includes some of the world’s foremost experts in their areas. We work on a broad range of machine learning problems across agent reliability, learner adaptation, evaluation, and multimodal perception – including building the world's best child speech recognition system, designed by co-authors of wav2vec https://arxiv.org/abs/2006.11477. We collaborate closely with advisors from Stanford and top industry research labs (on a weekly basis, not in some hands-off way). We work in-person out of our San Francisco office and we’re big believers in face-to-face collaboration.\n\n\n\n\nA NOTE ON IMMIGRATION\n\nIf you already have work authorization in the US, we're open to sponsorship depending on your situation. Our CTO and CEO have each gone through their own immigration journeys and are familiar with the challenges. We have successfully secured O-1 visas for Ello employees and retain top immigration counsel.\n\n\n\n\nABOUT ELLO\n\nEllo is a public benefit corporation on a mission to maximize the potential of all children. We’re currently around 45 people, headquartered in San Francisco with another office in Nairobi, Kenya.\n\n\n\nOur team has deep expertise in artificial intelligence, K-12 education, and child development across institutions such as Stanford, Berkeley, Google, Apple, and more. We were part of Y Combinator’s W20 batch and are funded by world-class investors including Goodwater Capital, Homebrew, Reed Hastings, Common Sense Growth, Ravensburger, Project A Ventures, Reach Capital, Khosla Ventures, WndrCo, Visible Ventures, and K9 Ventures.\n\n\n\nWe’re a small, collaborative team that takes each other’s voices very seriously. Because our mission is to support all children, it is critical that our team is representative of the communities we work in; we place significant emphasis on ensuring diversity in our team and inclusion in our culture.\n\n\n\nWe feel enormously privileged to be one of the few companies that has the opportunity to take a shot at truly revolutionizing education with AI at this inflection point in technology. We don’t take it for granted, so we work quite hard to turn that vision into reality with urgency. We want to create an environment in which we can all be our best selves, use our strengths to take Ello forward, and develop our own skills. We want to have fun while working hard to do impactful things that we’re proud of – and we believe it’s possible to do both.\n\n\n\nAt Ello, diversity is a moral imperative and a competitive advantage. We do not discriminate based on race, religion, skin color, national origin, gender, sexual orientation, age, marital status, veteran status, or disability status. We plan and structure our interviews to assess skills and experience directly. If you need accommodations throughout the interview process, please contact recruiting@ello.com."},{"id":"bba21fbf-7393-40f6-b9be-d9dde87110f3","title":"Product Lead, Monetization","department":"Growth","team":"Growth","employmentType":"FullTime","location":"San Francisco, CA","secondaryLocations":[],"publishedAt":"2026-09-09T20:53:46.765+00:00","isListed":true,"isRemote":null,"workplaceType":null,"address":{"postalAddress":{"addressRegion":"California","addressCountry":"USA","addressLocality":"San Francisco"}},"jobUrl":"https://jobs.ashbyhq.com/ello/bba21fbf-7393-40f6-b9be-d9dde87110f3","applyUrl":"https://jobs.ashbyhq.com/ello/bba21fbf-7393-40f6-b9be-d9dde87110f3/application","descriptionHtml":"Our mission at Ello is simple and urgent: maximize the potential of every child, everywhere. We're building the world's first AI teacher to close that gap: one that listens, speaks, adapts, and inspires, just like the best human educators.
Our first product, Read with Ello, is already helping tens of thousands of kids each week learn to read. It listens as they read aloud, offers support when they stumble, and generates magical, personalized stories. It works, and kids love it.
Now, we're scaling that success into something even bigger: a complete AI teacher that can help children learn far beyond reading. Our new app combines language, speech, and memory to deliver interactive learning for kids worldwide; check it out here. We're moving fast: we ship weekly, test directly with kids, and push the boundaries of what's possible with AI in education.
With the resources of the world's top investors and the heart of a public benefit corporation, we're here to revolutionize how children learn globally. Featured on TIME's Best Inventions and Fortune's Change the World, Ello is a small, mission-driven team taking on one of the most important challenges of our time: to democratize education.
Kids love Ello and parents trust it. The next thing to build is the business that carries it to every child who needs it; this role is for that challenge.
You'll own everything to do with how Ello makes money: what's free and what's paid, how we price and package, the paywall, trial conversion, renewals, dunning, cancellation, and winback. You'll build the monetization plan with our Head of Growth and CEO.
Two things make this different from monetizing a typical consumer app. We're a public benefit corporation, and we've committed publicly to a free, excellent experience for every family. That's a promise we intend to keep, so the teaching itself will never sit behind a paywall. You're also selling to two people at once: the child who does the lesson, and the parent who watches them do it and decides whether to pay. Both have to feel the value, at different moments and for different reasons.
The best version of this business feeds the mission directly. The more families choose to pay, the more children we can teach for free, including every child using Ello in Kenya today. That's what we want you to build.
Own pricing and packaging: what sits in the free experience, what a subscription includes, and what it costs
Own the paywall and checkout, from placement and timing through design and copy, and run the experiment program that improves them
Own everything after the first payment: trial conversion, renewals, failed payments and dunning, cancellation saves, and winback
Build the monetization model that feeds our revenue forecast
Build the monetization reporting we don't have yet, with our data team. Cohorted LTV, ARPU, payback, and retention curves good enough to make decisions on.
Work with lifecycle marketing on the emails and messages that drive conversion and retention, and with engineering and design on what ships in the app
Use AI to do the work of a much bigger team, and grow into hiring and leading the monetization team that follows
You've owned consumer subscription revenue on mobile, on both iOS and Android. For most people that means six or more years as a product manager, though we care about what you've done more than the years.
You've run paywall and pricing experiments yourself, and can give us the before and after numbers on a few of them, along with what you got wrong
You can build the subscription model yourself and know what moves it: LTV, ARPU, trial-to-paid, involuntary churn, payback period
You pull your own data. SQL or equivalent, well enough to define a metric, build a funnel and check a result without waiting for anyone.
You know your way around app store billing well enough to write the spec, including StoreKit and Play Billing, receipt validation, and subscription state
You use AI seriously in your own work, hands-on rather than overseeing other people doing it, and can be specific about what's changed in the last six months
You've built agreement across departments before. Pricing touches product, marketing, finance and support, and everyone will have a strong opinion.
Experience with kids' or family products, or another category where the person paying isn't the person using it
Experience monetizing something people have to trust, whether that's a children's product under privacy rules, health, or finance, where a pushy paywall costs you more than it earns
Experience with a product where most users never pay, and that's by design
Experience with in-product growth mechanics: nudges, rewards, cross-sell, referral, and lifecycle automation
You've built at our stage and can see past it. We're planning to grow very fast from here, so the ideal person has worked somewhere between roughly $1M and $10M in revenue where nothing was settled yet, and has also seen what breaks at ten times that.
You've run a small team, or you're ready to
Want this to be the most important thing they've worked on. We're trying to give every child a teacher of their own, and the rest of this job only matters because of that.
Get inside the user's head. That's a child learning to read and a parent hoping it's working, and we want someone who talks to them often, including the parents who didn't subscribe and the ones who cancelled.
Are rigorous. They design tests that actually settle a question, and change their mind when the result says they were wrong, without mistaking endless analysis for progress.
Have real product design sense. They're not designers, but they can sketch a paywall flow themselves and give a designer feedback more useful than \"this doesn't feel right.\"
Want to move fast. We ship weekly, and the people who like it here would rather put something in front of a real parent this week than get it perfect next month.
Shape the business model while it's still being decided, working directly with the founders. This is new ground at Ello, so you won't be picking up someone else's decisions.
Work at the front of what AI can currently do. The technology underneath Ello is hard: we built and patented our own speech recognition because nothing off the shelf could understand a six-year-old, and the teaching agent works out what a particular child needs next in under a second. We're AI-native in how we run the company too, so how you work here will keep changing as fast as what we ship.
Ello is free across the developing world, and it's fully funded. It isn't a pilot or a line in a press release, and it's a big part of why people here joined. Very few companies get to build a real business and give the same product away to the children who need it most.
Ello is a public benefit corporation on a mission to maximize the potential of all children. We're currently around ~50 people, headquartered in San Francisco with a second office in Nairobi, Kenya.
Our team has deep expertise in artificial intelligence, K-12 education, and child development across institutions such as Stanford, Berkeley, Google, Apple, and more. We were part of Y Combinator's W20 batch and are funded by world-class investors including Goodwater Capital, Homebrew, Reed Hastings, Common Sense Growth, Ravensburger, Project A Ventures, Reach Capital, Khosla Ventures, WndrCo, Visible Ventures, and K9 Ventures.
We're a small, collaborative team that takes each other's voices very seriously. Because our mission is to support all children, it is critical that our team is representative of the communities we work in; we place significant emphasis on ensuring diversity in our team and inclusion in our culture. If you have questions about immigration, reach out to us at recruiting@ello.com.
We feel enormously privileged to be building at this moment. Advances in AI have made it possible, for the first time, to imagine giving every child a truly personalized teacher. We don't take that opportunity for granted.
We work with urgency because millions of children can't wait. We care deeply about craftsmanship because learning experiences should feel magical. And we believe it's possible to build ambitious technology while building a company where people do the best work of their careers.
If that excites you, we'd love to meet you.
At Ello, diversity is a moral imperative and a competitive advantage. We do not discriminate based on race, religion, skin color, national origin, gender, sexual orientation, age, marital status, veteran status, or disability status. We plan and structure our interviews to assess skills and experience directly. If you need accommodations throughout the interview process, please contact recruiting@ello.com.
","descriptionPlain":"Our mission at Ello is simple and urgent: maximize the potential of every child, everywhere. We're building the world's first AI teacher to close that gap: one that listens, speaks, adapts, and inspires, just like the best human educators.\n\n\n\nOur first product, Read with Ello, is already helping tens of thousands of kids each week learn to read. It listens as they read aloud, offers support when they stumble, and generates magical, personalized stories. It works, and kids love it.\n\n\n\nNow, we're scaling that success into something even bigger: a complete AI teacher that can help children learn far beyond reading. Our new app combines language, speech, and memory to deliver interactive learning for kids worldwide; check it out here https://www.ello.com/. We're moving fast: we ship weekly, test directly with kids, and push the boundaries of what's possible with AI in education.\n\n\n\nWith the resources of the world's top investors and the heart of a public benefit corporation, we're here to revolutionize how children learn globally. Featured on TIME's Best Inventions and Fortune's Change the World, Ello is a small, mission-driven team taking on one of the most important challenges of our time: to democratize education.\n\n\n\n\nABOUT THE ROLE\n\nKids love Ello and parents trust it. The next thing to build is the business that carries it to every child who needs it; this role is for that challenge.\n\n\n\nYou'll own everything to do with how Ello makes money: what's free and what's paid, how we price and package, the paywall, trial conversion, renewals, dunning, cancellation, and winback. You'll build the monetization plan with our Head of Growth and CEO.\n\n\n\nTwo things make this different from monetizing a typical consumer app. We're a public benefit corporation, and we've committed publicly to a free, excellent experience for every family. That's a promise we intend to keep, so the teaching itself will never sit behind a paywall. You're also selling to two people at once: the child who does the lesson, and the parent who watches them do it and decides whether to pay. Both have to feel the value, at different moments and for different reasons.\n\n\n\nThe best version of this business feeds the mission directly. The more families choose to pay, the more children we can teach for free, including every child using Ello in Kenya today. That's what we want you to build.\n\n\n\n\nWHAT YOU'LL DO\n\n - Own pricing and packaging: what sits in the free experience, what a subscription includes, and what it costs\n\n - Own the paywall and checkout, from placement and timing through design and copy, and run the experiment program that improves them\n\n - Own everything after the first payment: trial conversion, renewals, failed payments and dunning, cancellation saves, and winback\n\n - Build the monetization model that feeds our revenue forecast\n\n - Build the monetization reporting we don't have yet, with our data team. Cohorted LTV, ARPU, payback, and retention curves good enough to make decisions on.\n\n - Work with lifecycle marketing on the emails and messages that drive conversion and retention, and with engineering and design on what ships in the app\n\n - Use AI to do the work of a much bigger team, and grow into hiring and leading the monetization team that follows\n\n\n\n\nKEY REQUIREMENTS\n\n - You've owned consumer subscription revenue on mobile, on both iOS and Android. For most people that means six or more years as a product manager, though we care about what you've done more than the years.\n\n - You've run paywall and pricing experiments yourself, and can give us the before and after numbers on a few of them, along with what you got wrong\n\n - You can build the subscription model yourself and know what moves it: LTV, ARPU, trial-to-paid, involuntary churn, payback period\n\n - You pull your own data. SQL or equivalent, well enough to define a metric, build a funnel and check a result without waiting for anyone.\n\n - You know your way around app store billing well enough to write the spec, including StoreKit and Play Billing, receipt validation, and subscription state\n\n - You use AI seriously in your own work, hands-on rather than overseeing other people doing it, and can be specific about what's changed in the last six months\n\n - You've built agreement across departments before. Pricing touches product, marketing, finance and support, and everyone will have a strong opinion.\n\n\n\n\nNICE TO HAVE\n\n - Experience with kids' or family products, or another category where the person paying isn't the person using it\n\n - Experience monetizing something people have to trust, whether that's a children's product under privacy rules, health, or finance, where a pushy paywall costs you more than it earns\n\n - Experience with a product where most users never pay, and that's by design\n\n - Experience with in-product growth mechanics: nudges, rewards, cross-sell, referral, and lifecycle automation\n\n - You've built at our stage and can see past it. We're planning to grow very fast from here, so the ideal person has worked somewhere between roughly $1M and $10M in revenue where nothing was settled yet, and has also seen what breaks at ten times that.\n\n - You've run a small team, or you're ready to\n\n\n\n\nWE LOOK FOR CANDIDATES WHO\n\n - Want this to be the most important thing they've worked on. We're trying to give every child a teacher of their own, and the rest of this job only matters because of that.\n\n - Get inside the user's head. That's a child learning to read and a parent hoping it's working, and we want someone who talks to them often, including the parents who didn't subscribe and the ones who cancelled.\n\n - Are rigorous. They design tests that actually settle a question, and change their mind when the result says they were wrong, without mistaking endless analysis for progress.\n\n - Have real product design sense. They're not designers, but they can sketch a paywall flow themselves and give a designer feedback more useful than \"this doesn't feel right.\"\n\n - Want to move fast. We ship weekly, and the people who like it here would rather put something in front of a real parent this week than get it perfect next month.\n\n\n\n\nREASONS TO JOIN US\n\n - Shape the business model while it's still being decided, working directly with the founders. This is new ground at Ello, so you won't be picking up someone else's decisions.\n\n - Work at the front of what AI can currently do. The technology underneath Ello is hard: we built and patented our own speech recognition because nothing off the shelf could understand a six-year-old, and the teaching agent works out what a particular child needs next in under a second. We're AI-native in how we run the company too, so how you work here will keep changing as fast as what we ship.\n\n - Ello is free across the developing world, and it's fully funded. It isn't a pilot or a line in a press release, and it's a big part of why people here joined. Very few companies get to build a real business and give the same product away to the children who need it most.\n\n\n\n\nABOUT ELLO\n\nEllo is a public benefit corporation on a mission to maximize the potential of all children. We're currently around ~50 people, headquartered in San Francisco with a second office in Nairobi, Kenya.\n\n\n\nOur team has deep expertise in artificial intelligence, K-12 education, and child development across institutions such as Stanford, Berkeley, Google, Apple, and more. We were part of Y Combinator's W20 batch and are funded by world-class investors including Goodwater Capital, Homebrew, Reed Hastings, Common Sense Growth, Ravensburger, Project A Ventures, Reach Capital, Khosla Ventures, WndrCo, Visible Ventures, and K9 Ventures.\n\n\n\nWe're a small, collaborative team that takes each other's voices very seriously. Because our mission is to support all children, it is critical that our team is representative of the communities we work in; we place significant emphasis on ensuring diversity in our team and inclusion in our culture. If you have questions about immigration, reach out to us at recruiting@ello.com.\n\n\n\nWe feel enormously privileged to be building at this moment. Advances in AI have made it possible, for the first time, to imagine giving every child a truly personalized teacher. We don't take that opportunity for granted.\n\n\n\nWe work with urgency because millions of children can't wait. We care deeply about craftsmanship because learning experiences should feel magical. And we believe it's possible to build ambitious technology while building a company where people do the best work of their careers.\n\n\n\nIf that excites you, we'd love to meet you.\n\n\n\nAt Ello, diversity is a moral imperative and a competitive advantage. We do not discriminate based on race, religion, skin color, national origin, gender, sexual orientation, age, marital status, veteran status, or disability status. We plan and structure our interviews to assess skills and experience directly. If you need accommodations throughout the interview process, please contact recruiting@ello.com."},{"id":"60464edf-a471-47f7-9465-d2433037154d","title":"Lead Growth Engineer","department":"Engineering","team":"Engineering","employmentType":"FullTime","location":"San Francisco, CA","secondaryLocations":[],"publishedAt":"2026-09-30T16:46:21.789+00:00","isListed":true,"isRemote":null,"workplaceType":null,"address":{"postalAddress":{"addressRegion":"California","addressCountry":"USA","addressLocality":"San Francisco"}},"jobUrl":"https://jobs.ashbyhq.com/ello/60464edf-a471-47f7-9465-d2433037154d","applyUrl":"https://jobs.ashbyhq.com/ello/60464edf-a471-47f7-9465-d2433037154d/application","descriptionHtml":"Our mission at Ello is simple and urgent: maximize the potential of every child, everywhere. We’re building the world’s first AI teacher—one that listens, speaks, adapts, and inspires, just like the best human educators.
Our first product, Read with Ello, is already helping tens of thousands of kids each week learn to read. It listens as they read aloud, offers support when they stumble, and generates magical, personalized stories. It works, and kids love it.
Now we’re scaling that success into something even bigger: a complete AI teacher that can help children learn far beyond reading. Our new app combines language, speech, and memory to deliver interactive learning for kids worldwide; check it out here. We ship weekly, test directly with kids, and push the boundaries of what’s possible with AI in education.
With the resources of the world’s top investors and the heart of a public benefit corporation, we’re here to revolutionize how children learn globally. Featured on TIME’s Best Inventions and Fortune’s Change the World, Ello is a small, mission-driven team taking on one of the most important challenges of our time: democratizing education.
Ello is entering a new stage of growth, and we’re hiring our first dedicated Growth Engineer to help define and lead how growth engineering works here.
You’ll collaborate closely with PMs and key stakeholders to ideate, develop and bring ideas to life. You’ll own the full learning loop that drives features into real business outcomes. Your work spans customer facing product surfaces that carry into the data, experimentation, and operational systems behind them.
This is a high-ownership role for someone who wants to help build a function, not simply join one. You might be an exceptional product-minded generalist with a high ceiling, or an experienced growth engineer who brings a craft we do not yet have. We care more about judgment, creativity, agency, and demonstrated impact than a specific number of years.
We work in person from our San Francisco office and are big believers in face-to-face collaboration.
Help build Ello’s growth-engineering strategy, operating model, tooling, and standards.
Develop and own growth features end to end across mobile, web, backend, and lifecycle channels—from idea through launch and iteration.
Identify high-leverage opportunities across acquisition, activation, engagement, retention, and referral.
Design and run small, fast experiments; define success metrics; instrument the experience; and turn results into clear next steps.
Improve critical journeys such as onboarding, signup, parent experiences, referrals, notifications, and other growth loops.
Build or evolve experimentation, analytics, and data systems that increase the team’s velocity of learning.
Connect quantitative signals with qualitative insight into children’s and parents’ motivations and behavior.
Partner closely with product, design, engineering, marketing, and company leadership while independently driving work forward.
Bring a distinctive strength to the team and help us raise the bar for growth engineering as the function develops.
The strongest candidates will be excellent in at least two of the following areas and solid in the third:
Engineering: You can independently ship high-quality, full-stack product work and build for rapid iteration.
Growth and product judgment: You understand funnels, growth loops, user motivation, and how product or incentive changes affect behavior.
Experimentation and data: You can define metrics, design and interpret experiments, and use data to make product decisions without waiting for a data scientist.
Creativity & innovation: You bring new ideas to the table, derived from first principles of what resonates with our users and their needs.
You’ll also bring:
A track record of shipping product or growth initiatives that produced measurable user or business impact.
Strong ownership and a bias to action: you can create something from nothing, turn ambiguity into a plan, and follow through.
Comfort working across the stack. Experience with Flutter, native iOS or Android, React, Python, or comparable technologies is useful; we care most about your ability to learn and deliver.
Hands-on experience with analytics and experimentation tools, such as SQL, Mixpanel, Amplitude, Segment, or equivalent systems.
Strong product sense, including empathy for user motivations and an ability to connect data trends to underlying human behavior.
A collaborative, direct communication style and the ability to work effectively across engineering, product, design, marketing, and business.
The judgment to balance speed with quality and the confidence to ship partial solutions when that is the fastest way to learn.
Experience building beautiful & delightful products features or experiences for children and parents.
Experience with consumer growth,sharing, subscriptions, lifecycle systems, or referral products.
Experience integrating third-party systems such as Stripe, Twilio, SendGrid, or CRMs.
Experience using AI tools to increase development velocity or working with AI products and evaluation pipelines.
Experience setting the foundations for or have spun up new function, practice, or team.
Want to build, experiment, and bring something new to the table.
Have something to teach us and are eager to learn from an excellent team.
Take initiative and full ownership of their work.
Care deeply about craft while valuing the velocity of learning.
Want to make a meaningful impact on child development at scale.
Prefer open, direct communication grounded in empathy.
Act with integrity and want to build meaningful relationships at work.
Build a new growth-engineering function with unusual ownership and room to grow.
Work at the frontier of AI and interactive learning.
See your work reach thousands of families around the world, helping children engage with their learning journey. .
Join an exceptional, mission-driven team with a culture of engineering excellence.
Ello is a public benefit corporation on a mission to maximize the potential of all children. We’re currently around 50 people, headquartered in San Francisco with a second office in Nairobi, Kenya.
Our team has deep expertise in artificial intelligence, K–12 education, and child development across institutions such as Stanford, Berkeley, Google, Apple, and more. We were part of Y Combinator’s W20 batch and are funded by world-class investors including Goodwater Capital, Homebrew, Reed Hastings, Common Sense Growth, Ravensburger, Project A Ventures, Reach Capital, Khosla Ventures, WndrCo, Visible Ventures, and K9 Ventures.
We’re a small, collaborative team that takes each other’s voices very seriously. Because our mission is to support all children, it is critical that our team represents the communities we work in; we place significant emphasis on diversity in our team and inclusion in our culture. If you have questions about immigration, reach out to us at recruiting@ello.com.
We feel enormously privileged to be building at this moment. Advances in AI have made it possible, for the first time, to imagine giving every child a truly personalized teacher. We don’t take that opportunity for granted.
We work with urgency because millions of children can’t wait. We care deeply about craftsmanship because learning experiences should feel magical. And we believe it’s possible to build ambitious technology while building a company where people do the best work of their careers.
If that excites you, we’d love to meet you.
At Ello, diversity is a moral imperative and a competitive advantage. We do not discriminate based on race, religion, skin color, national origin, gender, sexual orientation, age, marital status, veteran status, or disability status. We plan and structure our interviews to assess skills and experience directly. If you need accommodations throughout the interview process, please contact recruiting@ello.com.
","descriptionPlain":"Our mission at Ello is simple and urgent: maximize the potential of every child, everywhere. We’re building the world’s first AI teacher—one that listens, speaks, adapts, and inspires, just like the best human educators.\n\n\n\nOur first product, Read with Ello, is already helping tens of thousands of kids each week learn to read. It listens as they read aloud, offers support when they stumble, and generates magical, personalized stories. It works, and kids love it.\n\n\n\nNow we’re scaling that success into something even bigger: a complete AI teacher that can help children learn far beyond reading. Our new app combines language, speech, and memory to deliver interactive learning for kids worldwide; check it out here https://www.ello.com/. We ship weekly, test directly with kids, and push the boundaries of what’s possible with AI in education.\n\n\n\nWith the resources of the world’s top investors and the heart of a public benefit corporation, we’re here to revolutionize how children learn globally. Featured on TIME’s Best Inventions and Fortune’s Change the World, Ello is a small, mission-driven team taking on one of the most important challenges of our time: democratizing education.\n\n\n\n\nABOUT THE ROLE\n\nEllo is entering a new stage of growth, and we’re hiring our first dedicated Growth Engineer to help define and lead how growth engineering works here.\n\n\n\nYou’ll collaborate closely with PMs and key stakeholders to ideate, develop and bring ideas to life. You’ll own the full learning loop that drives features into real business outcomes. Your work spans customer facing product surfaces that carry into the data, experimentation, and operational systems behind them.\n\n\n\nThis is a high-ownership role for someone who wants to help build a function, not simply join one. You might be an exceptional product-minded generalist with a high ceiling, or an experienced growth engineer who brings a craft we do not yet have. We care more about judgment, creativity, agency, and demonstrated impact than a specific number of years.\n\nWe work in person from our San Francisco office and are big believers in face-to-face collaboration.\n\n\n\n\nWHAT YOU’LL DO\n\n - Help build Ello’s growth-engineering strategy, operating model, tooling, and standards.\n\n - Develop and own growth features end to end across mobile, web, backend, and lifecycle channels—from idea through launch and iteration.\n\n - Identify high-leverage opportunities across acquisition, activation, engagement, retention, and referral.\n\n - Design and run small, fast experiments; define success metrics; instrument the experience; and turn results into clear next steps.\n\n - Improve critical journeys such as onboarding, signup, parent experiences, referrals, notifications, and other growth loops.\n\n - Build or evolve experimentation, analytics, and data systems that increase the team’s velocity of learning.\n\n - Connect quantitative signals with qualitative insight into children’s and parents’ motivations and behavior.\n\n - Partner closely with product, design, engineering, marketing, and company leadership while independently driving work forward.\n\n - Bring a distinctive strength to the team and help us raise the bar for growth engineering as the function develops.\n\n\n\n\nWHAT WE’RE LOOKING FOR\n\nThe strongest candidates will be excellent in at least two of the following areas and solid in the third:\n\n - Engineering: You can independently ship high-quality, full-stack product work and build for rapid iteration.\n\n - Growth and product judgment: You understand funnels, growth loops, user motivation, and how product or incentive changes affect behavior.\n\n - Experimentation and data: You can define metrics, design and interpret experiments, and use data to make product decisions without waiting for a data scientist.\n\n - Creativity & innovation: You bring new ideas to the table, derived from first principles of what resonates with our users and their needs.\n\nYou’ll also bring:\n\n - A track record of shipping product or growth initiatives that produced measurable user or business impact.\n\n - Strong ownership and a bias to action: you can create something from nothing, turn ambiguity into a plan, and follow through.\n\n - Comfort working across the stack. Experience with Flutter, native iOS or Android, React, Python, or comparable technologies is useful; we care most about your ability to learn and deliver.\n\n - Hands-on experience with analytics and experimentation tools, such as SQL, Mixpanel, Amplitude, Segment, or equivalent systems.\n\n - Strong product sense, including empathy for user motivations and an ability to connect data trends to underlying human behavior.\n\n - A collaborative, direct communication style and the ability to work effectively across engineering, product, design, marketing, and business.\n\n - The judgment to balance speed with quality and the confidence to ship partial solutions when that is the fastest way to learn.\n\n\n\n\nNICE TO HAVE\n\n - Experience building beautiful & delightful products features or experiences for children and parents.\n\n - Experience with consumer growth,sharing, subscriptions, lifecycle systems, or referral products.\n\n - Experience integrating third-party systems such as Stripe, Twilio, SendGrid, or CRMs.\n\n - Experience using AI tools to increase development velocity or working with AI products and evaluation pipelines.\n\n - Experience setting the foundations for or have spun up new function, practice, or team.\n\n\n\n\nWE LOOK FOR CANDIDATES WHO\n\n - Want to build, experiment, and bring something new to the table.\n\n - Have something to teach us and are eager to learn from an excellent team.\n\n - Take initiative and full ownership of their work.\n\n - Care deeply about craft while valuing the velocity of learning.\n\n - Want to make a meaningful impact on child development at scale.\n\n - Prefer open, direct communication grounded in empathy.\n\n - Act with integrity and want to build meaningful relationships at work.\n\n\n\n\nWHY JOIN ELLO\n\n - Build a new growth-engineering function with unusual ownership and room to grow.\n\n - Work at the frontier of AI and interactive learning.\n\n - See your work reach thousands of families around the world, helping children engage with their learning journey. .\n\n - Join an exceptional, mission-driven team with a culture of engineering excellence.\n\n\n\n\nABOUT ELLO\n\nEllo is a public benefit corporation on a mission to maximize the potential of all children. We’re currently around 50 people, headquartered in San Francisco with a second office in Nairobi, Kenya.\n\n\n\nOur team has deep expertise in artificial intelligence, K–12 education, and child development across institutions such as Stanford, Berkeley, Google, Apple, and more. We were part of Y Combinator’s W20 batch and are funded by world-class investors including Goodwater Capital, Homebrew, Reed Hastings, Common Sense Growth, Ravensburger, Project A Ventures, Reach Capital, Khosla Ventures, WndrCo, Visible Ventures, and K9 Ventures.\n\n\n\nWe’re a small, collaborative team that takes each other’s voices very seriously. Because our mission is to support all children, it is critical that our team represents the communities we work in; we place significant emphasis on diversity in our team and inclusion in our culture. If you have questions about immigration, reach out to us at recruiting@ello.com.\n\n\n\nWe feel enormously privileged to be building at this moment. Advances in AI have made it possible, for the first time, to imagine giving every child a truly personalized teacher. We don’t take that opportunity for granted.\n\n\n\nWe work with urgency because millions of children can’t wait. We care deeply about craftsmanship because learning experiences should feel magical. And we believe it’s possible to build ambitious technology while building a company where people do the best work of their careers.\n\n\n\nIf that excites you, we’d love to meet you.\n\n\n\nAt Ello, diversity is a moral imperative and a competitive advantage. We do not discriminate based on race, religion, skin color, national origin, gender, sexual orientation, age, marital status, veteran status, or disability status. We plan and structure our interviews to assess skills and experience directly. If you need accommodations throughout the interview process, please contact recruiting@ello.com."}],"apiVersion":"1"}