Senior Full-Stack Engineer (AI-Focused)

The role

You will build AI features from the interface to the model call. You will work with the CTO on the AI first roadmap and architecture.

What you will do

• Build AI features from interface to model call including UI, services, APIs, and the LLM layer
• Develop the in product AI agent from prompt design through production evals
• Build LLM pipelines including RAG, tool calling, agent orchestration, and evaluation
• Implement MCP integrations
• Manage speed, reliability and cost of AI features
• Shape the AI first roadmap and architecture with the CTO and product
• Define how the team builds with coding agents

Required qualifications

• 6+ years as a full stack engineer on production SaaS
• Strong TypeScript or JavaScript on both frontend and backend, including a modern frontend framework
• Solid Elixir and Python
• LLM features shipped to production: model APIs, RAG, tool calling or agents
• Track record of measuring LLM output quality through evals or similar systems
• Working knowledge of WebSocket traffic at high volume
• Daily use of AI coding agents
• C1 or C2 English

Nice to have

• Built an MCP server, connector, or other agent tooling
• Shipped an embedded JavaScript SDK or in app product experience
• Hands on with LLM tracing and observability tools
• Background in onboarding, product adoption, or PLG products

Before you apply

• Strong overlap with US working hours required

About the company

An established B2B SaaS platform that helps software companies onboard users and drive adoption through in app experiences. It reaches millions of end users across the US and Europe.