We’re supporting a fast-growing AI product team who are looking for a Contract Full Stack Engineer to help them take an early-stage platform from prototype through to a scalable, production-ready MVP.
The product is already up and running with a working UI, design system and initial architecture in place. The next phase is all about scaling the system properly, particularly across backend architecture, AI agent workflows, and evaluation/feedback loops.
What you’ll be working on
- Building and extending features in a Next.js-based application
- Helping define and evolve backend and system architecture
- Designing and improving AI agent workflows and orchestration
- Building evaluation frameworks, feedback loops, and quality measurement for LLM outputs
- Supporting the transition from prototype to scalable MVP
- Working closely with product and engineering stakeholders day-to-day
- React/Next.js
- Postgres / Supabase
- Arize Phoenix
- Flexible backend approach (still being shaped)
- Strong Full Stack engineering experience in production environments
- Hands-on experience with AI-enabled products, LLM workflows, or agent-based systems
- Familiarity with evaluation, prompt testing, or LLM quality measurement is important
- Exposure to LangGraph, Langfuse, and LangSmith would be highly relevant
- Experience with MCP-style infrastructure or tool orchestration patterns (e.g. caching/retrieval layers such as mcp-refcache)
- Comfortable working in fast-moving, product-led environments
- Experience working in AI-native setups (e.g. using tools like Claude Code) is a plus
Contract details:
- 3-month contract
- Remote (EU-based)
- Occasional fully expensed travel for in-person collaboration sessions
