Full Stack Engineer

Full Stack Engineer | Onsite New York | $150,000 to $250,000**CANDIDATES MUST BE US CITIZENS OR GREEN CARD HOLDERS**Zenith Row is partnering with a well-funded AI startup in Manhattan building applied AI systems for large enterprise customers. The product is live, the revenue is real, and the team is small but growing fast.We are looking for a Full Stack Engineer at senior to staff level to own critical parts of the platform. This is a high-ownership role for someone who wants to work on real agentic systems in production and be part of shaping an engineering team from the ground up.Who you are3 to 8 years of fullstack experience shipping products at a startup, high-velocity, or AI-driven companyFluent in Python, React, and TypeScript with strong experience across REST APIs and cloud-based architecturesProven hands-on experience building or deploying agentic AI systems, LLM frameworks, or language models in production. This is a must, not a nice to haveComfortable with event-driven systems and unstructured data pipelinesProduct-minded with the ability to prioritise, make decisions, and execute independentlyBonus: experience building evaluation or observability tooling for AI agentsResponsibilitiesBuild and scale the core platform, owning performance, reliability, and uptimeImprove agent tooling and conversation quality used by onboarding and customer success teamsOptimise omni-channel delivery across SMS, email, and voiceDesign systems for unstructured data and event-driven workflowsContribute to evaluation frameworks that improve AI agent accuracyWork closely with product and design to ship fast and iterate based on real customer feedbackWhy this roleYou will have real ownership over the platform and a direct hand in building the engineering culture from the ground up. Strong comp and meaningful equity at a company that has already proven itself.Compensation and benefits$150,000 to $250,000 baseMeaningful equityFully covered medical401k matchingUnlimited PTOMeals in officeGym stipendTravel passTech equipmentMentorshipRelocation supportInterested or know someone who might be? Reach out to Zenith Row directly or apply below.