Founding Senior Engineer

ABOUT THE ROLE Join an early-stage AI company building growth tools for consumer brands. As the second engineer, you will build core product systems hands-on while shaping the engineering culture and architecture. WHAT YOU'LL DO - Build data infrastructure that tracks merchant lifecycle events and connects actions to outcomes. - Develop agentic systems that assess growth operations, identify opportunities, and execute improvements automatically. - Own full-stack development of the growth engine, with a strong focus on backend systems and infrastructure. - Build and maintain reliable integrations with commerce and advertising platforms, along with orchestration tooling. - Mentor engineers while contributing directly to daily product development. WHAT WE'RE LOOKING FOR - Five to eight years of full-stack engineering experience, with strong backend skills across data infrastructure, event systems, and API integrations. - Experience building and owning production-grade agentic or LLM-powered systems that integrate with third-party APIs. - Familiarity with Python, TypeScript, LLMs, and commerce or marketing integrations such as Shopify, Meta Ads, TikTok Ads, or Klaviyo. - Experience leading or mentoring engineers, and a track record of prioritizing effectively in ambiguous environments. - Early-stage startup or founding engineer experience, or experience joining a startup during its growth stage. Strong computer science fundamentals are valued. - Clear communication skills and a consistent record of meaningful tenure. COMPENSATION & BENEFITS Base salary: $175,000 to $225,000 annually. Visa sponsorship is available. LOCATION On-site in New York, New York, United States.