Spara is building AI agents that sell. Our agents engage buyers across chat, voice, and email, handling everything from qualifying leads to booking meetings to answering deep product questions. We work with companies ranging from fast-growing startups to large enterprises, and our product is working: customers like Rho are seeing step-change improvements in their sales pipeline within weeks of going live.
Sales technology is a massive market, and the shift to AI-native GTM motions is still early. We're building the company that defines how it plays out. We've raised $15M from Radical Ventures and Inspired Capital, backed by the founders of PyTorch and Google Cloud TPU, and Heads of Sales at Anthropic and OpenAI.
Our founders have done this before: David was co-founder and CEO of Triplemint, which he led to acquisition, and Zander was technical co-founder of Nomad Health (now post-Series D) and most recently led Platform at Hyperscience AI.
We're a 20-person team in downtown Manhattan building something that will be much bigger. Our engineering team is small and senior, and everyone has real influence on what we build and how we build it.
We're looking for an engineer who lives and breathes the current wave of AI. Someone who's building with agents outside of work, has opinions about the latest model releases, and wants to apply that energy to production systems used by large enterprises.
As a Senior AI Engineer at Spara, you will:
Build and iterate on the AI systems that power our agents across chat, email, voice, meeting assistants, and lead enrichment. We ship new agent capabilities regularly, and the surface area is expanding fast.
Work across multiple agentic systems, both customer-facing and internal. You won't be stuck on one thing.
Improve retrieval, ranking, and response quality in a system that handles real customer conversations every day. The feedback loops are tight and the stakes are real.
Contribute to how we evaluate and measure quality across the platform. We care a lot about evals and are investing heavily here.
Ship to production multiple times a day using a modern stack: FastAPI/Python, React/TypeScript, Postgres + pgvector, multiple foundation models (OpenAI, Anthropic), Google Cloud, Docker, GitHub Actions.
4+ years of engineering experience with meaningful time spent working with LLMs and related technologies
At least one startup under your belt. You know what it's like to build fast with a small team and wear multiple hats.
Deep familiarity with the agentic AI landscape. You follow what's happening, you've tried the new tools, you have opinions.
Proven ability to ship ML/AI systems in production, not just prototypes
Strong software engineering fundamentals across the stack
You're excited about the messy, fast-moving parts of building an early-stage AI company
Experience with retrieval systems, search, or NLP
Advanced degree in ML or a related field
Hybrid: 3 days per week in our office in downtown Manhattan (World Trade Center), with the option to work remotely on Wednesdays and Fridays.
Health, dental, and vision insurance
Flexible PTO
Collaborative environment with experienced engineers solving hard problems together
Real ownership over product direction from day one
In-office culture in NYC with flexibility for work-life balance
Spara is building AI agents that sell. Our agents engage buyers across chat, voice, and email, handling everything from qualifying leads to booking meetings to answering deep product questions. We work with companies ranging from fast-growing startups to large enterprises, and our product is working: customers like Rho are seeing step-change improvements in their sales pipeline within weeks of going live.
Sales technology is a massive market, and the shift to AI-native GTM motions is still early. We're building the company that defines how it plays out. We've raised $15M from Radical Ventures and Inspired Capital, backed by the founders of PyTorch and Google Cloud TPU, and Heads of Sales at Anthropic and OpenAI.
Our founders have done this before: David was co-founder and CEO of Triplemint, which he led to acquisition, and Zander was technical co-founder of Nomad Health (now post-Series D) and most recently led Platform at Hyperscience AI.
We're a 20-person team in downtown Manhattan building something that will be much bigger. Our engineering team is small and senior, and everyone has real influence on what we build and how we build it.
We're looking for someone who's been in the NLP and ML space long enough to have perspective. You've seen the field evolve, you transitioned into the LLM era with a clear understanding of what changed and what didn't, and you have strong instincts for when to prompt-engineer vs. fine-tune, how to build eval systems that actually scale, and how to make pragmatic architecture decisions under real constraints.
As a Staff AI Engineer at Spara, you will:
Go deep on the core engine that powers all of Spara's AI agents: retrieval, ranking, response generation, and the frameworks that tie them together. You'll bring a level of depth and technical judgment here that raises the bar for the whole team.
Design and scale the evaluation approach across the platform as we add new agent types and capabilities.
Bring depth on fine-tuning and training: when it's worth it, how to do it well, and how to make pragmatic tradeoffs as the platform scales.
Make foundational technical decisions that compound. At our stage, the right abstractions and architectural choices have outsized impact.
Collaborate closely with leadership to shape the product and technical roadmap. This is a role with real influence, not just execution.
Ship to production multiple times a day using a modern stack: FastAPI/Python, React/TypeScript, Postgres + pgvector, multiple foundation models (OpenAI, Anthropic), Google Cloud, Docker, GitHub Actions.
7+ years of engineering experience, with significant depth in NLP, search, retrieval, or related ML domains
Experience that predates the current LLM wave. You understand the fundamentals underneath the abstractions.
Track record of designing and deploying sophisticated ML/AI systems in production
Strong opinions on evaluation methodology. You've built eval pipelines before and know what makes them useful vs. theater.
Experience with or strong instincts around fine-tuning: when it's worth it, how to do it well, what the tradeoffs are
Ability to thrive in an early-stage environment. We're seed stage with real enterprise customers and a senior team, moving fast toward our next phase of growth.
Excellent communication skills. You'll be shaping how the team thinks about hard problems, not just solving them alone.
Advanced degree in ML, NLP, or a related field
Previous startup experience, especially at companies that scaled from early to growth stage
Hybrid: 3 days per week in our office in downtown Manhattan (World Trade Center), with the option to work remotely on Wednesdays and Fridays.
Health, dental, and vision insurance
Flexible PTO
Collaborative environment with experienced engineers solving hard problems together
Real ownership over product direction and technical architecture
In-office culture in NYC with flexibility for work-life balance
Spara is the platform for agent-led growth. GTM teams, from high-growth startups to the Fortune 500, win more revenue by putting AI agents to work across the full sales cycle, while their reps stay focused on the deals that need them.
Spara agents talk directly to buyers to move deals forward. They engage and qualify every website visitor, run interactive AI product demos, reactivate dormant leads, follow up after events, and handle customer onboarding. Whether a deal should be closed by an agent or handed to a rep, Spara makes sure every buyer gets an immediate, high-quality conversation and every rep stays focused on what closes.
We're backed by Radical Ventures and Inspired Capital, with participation from XYZ Ventures, FJ Labs, Remarkable Ventures, and strategic angels working at OpenAI, Anthropic, Google, Meta, Databricks, and G2.
You'll be Spara's first dedicated demand gen hire, building the function from the ground up and finding the channel mix that wins. You'll report directly into the Head of Marketing and serve as a thought partner in steering the brand, laying the foundation for the marketing function, and shaping the ultimate success of Spara.
Working alongside senior GTM leadership, you'll be the connective tissue between sales and marketing, turning positioning into pipeline and pipeline into sales conversations reps actually want to take.
And because we sell agent-led growth, you'll live it. Spara's own agents will be part of your funnel, engaging and qualifying the demand you generate, so you'll learn faster than any marketer relying on forms and follow-up sequences ever could.
Design, launch, and own our demand gen engine: paid, email nurture, retargeting, webinars, AEO/GEO, events, and partner co-marketing, chosen and sequenced by what the data tells you.
Run a rapid, disciplined test-and-learn program across channels: form a hypothesis, ship the experiment, read the results honestly, and double down on what generates qualified pipeline. Some of your best-performing plays will cost almost nothing.
Treat our database as a channel of its own, with nurture, reactivation, and lifecycle programs that turn dormant leads, closed-lost deals, and event contacts back into pipeline.
Invent creative plays across the ecosystem: partner webinars and co-marketing with adjacent GTM tools, community presence where our buyers already hang out, and turning founder and exec content into a distribution engine.
Use AI as a force multiplier across everything, from audience research and creative iteration to personalization, campaign analysis, and workflow automation.
Partner with the Head of Sales and reps to align campaigns to segments and territories, tighten the marketing-to-sales handoff, and run hand-built ABM plays on the accounts that matter most.
Bring a strong point of view on what we should try next, argue for it with evidence, and change your mind quickly when the numbers disagree.
Hands-on. 5+ years running B2B SaaS demand gen or growth marketing end-to-end. You've personally built and run paid, email, and content-driven campaigns.
A self-starter. You see the gap, scope the work, and ship it.
AI is how you work. You're constantly experimenting with new tools, agents, and automation, and you have strong opinions about what actually moves the needle.
Opinionated and data-honest. You bring a strong POV about what to test and why, and you let the pipeline number decide what survives.
A true partner to sales. You've worked shoulder-to-shoulder with sales leadership and reps, and you measure yourself on the numbers they care about: qualified pipeline and revenue.
Fluent in the stack. Strong command of marketing automation, CRM, and attribution tooling (HubSpot, Salesforce, or similar), and quick to pick up whatever's next.
Experience running demand gen across both PLG and sales-led motions.
ABM and field/event marketing experience: driving attendance, follow-up, and promotion.
An eye for creative that converts, and experience directing freelance talent to scale it.
In-office 4 days per week in downtown Manhattan (World Trade Center), with the option to work remotely on Fridays.
Health, dental, and vision insurance
Flexible PTO
401k