Product Engineer

About the Role

This is a full-stack product engineering role at a fast-growing, YC- and venture-backed B2B SaaS company in the ad-tech space, currently at $3M ARR with 200-plus customers. The team builds production AI agents that manage million-dollar advertising budgets, and this engineer will own large chunks of the product from initial customer conversation all the way through to shipped, polished feature. The culture is high-intensity and in-person, with an expectation of roughly 50 to 60 hours a week and onboarding that happens face-to-face in New York City.

The ideal candidate is a true full-stack engineer who has taken products from 0 to 1, either at a seed-stage startup, on a small launch team inside a larger company, or through impressive side projects. You are equally comfortable in the front end and the back end, you have strong product taste, and you thrive when the goal is clear but the path is not. Candidates coming from big tech are welcome if they can demonstrate real ownership and full-stack depth rather than narrow, siloed work.

Key Responsibilities

• Own large portions of quarterly product goals set by the founders and decide independently what to build to achieve them
• Take features from initial customer conversation through design, implementation, and iteration without waiting for a fully defined spec
• Build and maintain production AI agents that perform high-stakes work, including the harness, memory, learning loops, tools, and the user-facing interface
• Ship end-to-end features across React, Python, Postgres, and Clickhouse, polishing UX as well as back-end systems
• Work directly with customers on a regular basis to surface problems, validate solutions quickly, and feed that learning back into the product
• Use coding agents and AI tooling to automate repetitive work and continuously raise the bar on quality and delivery speed
• Launch new products from 0 to 1 alongside maintaining and improving the existing platform

Required Skills & Experience

• 2 to 10 years of experience as a full-stack engineer (exceptional candidates up to roughly 12 years may be considered)
• Demonstrated ability to ship large end-to-end features or take a product from 0 to 1 with full ownership, this is a dealbreaker requirement
• Equal depth in both front end and back end; candidates strong in only one area are not a fit for this role
• Proficiency with React, Python, and Postgres
• History of working directly with customers to shape and prioritize what gets built
• Strong product taste: genuine interest in studying and critiquing other products and UX
• Based in New York City or willing to relocate; must be able to work in-office 5 days a week
• Candidates with fewer than 3 years of experience need standout signals such as unusually fast career growth or strong independent projects
• Open to visa transfers including OPT and H-1B transfers

Preferred Skills

• Experience building production AI agents or data-intensive products
• Familiarity with Clickhouse
• Background at a seed-to-Series A startup or a small new-launch team inside a larger organization
• Big tech background paired with clear evidence of outsized ownership and full-stack work