Senior Full Stack Engineer

Job Description

Senior Full Stack Engineer

Compensation: $200,000-$275,000 base + equity

Location: New York City 5 days onsite

Employment Type: Full-time

Join a venture-backed startup where senior engineers own the product from architecture to the final user experience.

Our client is building software that helps teams manage complex, high-stakes work, combining intuitive applications, reliable backend systems, and AI-powered workflows.

The company is growing and deliberately keeping its core engineering team small. They're looking for a Senior Full Stack Engineer who enjoys broad ownership, close contact with users, and the opportunity to shape a product while important decisions are still being made.

The Opportunity

This is an end-to-end product engineering role spanning full-stack development, backend architecture, and applied AI.

You'll build the services and data models behind complex workflows, then carry that work through to polished interfaces that people use every day.

You'll work closely with founders and users, help decide what to build, and influence the engineering standards that support the company's next stage of growth.

What You'll Do

• Own product features end to end: Take problems from initial discovery through design, implementation, release, and iteration.
• Build modern web applications: Create responsive, thoughtful interfaces using TypeScript, React, and Next.js.
• Design robust backend systems: Develop APIs, services, and data models that support complex operational workflows.
• Integrate AI into the product: Build useful LLM-powered features, retrieval capabilities, and workflow automation.
• Make complex information usable: Design systems that account for context, changing information, and data provenance.
• Work directly with users: Understand how people operate and use that feedback to guide product decisions.
• Shape engineering practices: Improve architecture, testing, reliability, performance, and code quality.

What You'll Bring

• A strong track record of building and shipping production software.
• Genuine full-stack capability, with particular strength in backend engineering and system design.
• Strong TypeScript and React skills, with experience in Next.js or comparable frameworks.
• Confidence designing APIs, databases, data models, and service architectures.
• Experience owning substantial features or systems with a high degree of independence.
• Good product judgment and care for usability, interaction design, and the details of a finished product.
• Comfort integrating LLM-powered capabilities and using modern AI development tools.
• The ability to work effectively in a small team with evolving requirements and broad responsibilities.
• Willingness to work onsite in NYC five days per week.

About People In AI

People In AI is a specialist recruitment partner connecting exceptional AI, machine learning, and engineering talent with ambitious companies building the next generation of intelligent technology.

We work closely with innovative startups and scaling technology businesses to identify opportunities where talented engineers can make a meaningful impact.

Interested in owning meaningful product decisions and building across the full stack? We'd love to hear from you.