We’re working with a fast-growing AI company looking for a Senior Fullstack Engineer to build production AI features end to end. You’ll work across React & TypeScript on the frontend and Python & FastAPI on the backend, taking features all the way from idea through to production. Expect to work on everything from APIs, data and LLM integrations through to streaming interfaces and document-heavy UIs. This is a hands-on role with real ownership, where you’ll help shape both the architecture and the product as the company scales.
Must Haves
5+ years building and shipping fullstack applications
React – 5+ years
TypeScript – 3+ years
Python / FastAPI – 3+ years
Strong experience building and designing production APIs
PostgreSQL
Redis – 2+ years
Experience building modern, high-quality user interfaces
Comfortable owning features end to end – backend through to frontend
Experience using AI coding tools such as Claude Code, Cursor or Copilot
Comfortable working in a fast-moving startup environment
Nice to Haves
Experience building products involving LLMs, RAG or AI agents
Next.js
React Query
Zustand
Tailwind CSS
shadcn/ui
LangChain or LlamaIndex
SSE / WebSockets and streaming applications
Experience building document-heavy or real-time interfaces
Genuine interest in AI engineering and agentic applications