Senior Full Stack Engineer (Agentic AI)

**Type:** B2B contract **Working pattern:** Flexible, home, office or hybrid **Location:** Within 80 km of Cluj, Iasi or Bucharest Most engineering roles start once the hard decisions are made. This one starts before them. You’ll be the first engineer on a new client engagement, before there’s a team or plan, working out what’s possible and building the proof a delivery team can scale from. **What’s in it for you** You’ll decide how the work gets done, with AI tools that aren’t locked down. On a recent 19-week AI platform build, 80.5% of authored commits carried verifiable AI co-authorship. You’ll work alongside our agentic team and help shape how we do agentic engineering. You don’t need to arrive an expert. **Who you’ll work for** hedgehog lab is a UK digital product consultancy and certified B Corp with 20 years behind us and teams in the UK, Bulgaria and Romania. We help public and private sector clients in healthcare, commerce, media and education. Project teams are 5 to 15 people: agentic engineers, software engineers, QA and designers. **What you’ll do** - Turning client goals into architecture and technology choices, recorded in ADRs - Building proofs of concept that validate the design - Setting up tooling, workflows and guardrails for AI coding agents - Shaping testing and code review - Pairing with engineers and leaving patterns client teams can own **Essential experience** You’ll be in front of clients from week one. If you’d rather keep your head down and code, this isn’t for you. - Commercial TypeScript or Python experience across the full stack (NestJS or FastAPI, for example) - Hands-on use of AI agents in a real workflow, at work or in your own projects. A GitHub repo counts. - You’ve taken a messy, poorly defined problem and shipped something that works - Comfortable explaining your thinking to non-technical people - Clear writing, especially ADRs and docs - Pragmatic architecture, sized to POC, pilot or production **Desirable experience** - Consulting, professional services or forward deployed experience - Experience presenting to clients or contributing to pitches **How to apply** There are two stages: a call with our Talent Acquisition Lead, then a 90-minute interview with two engineers. There’s no technical test. Apply below, or get in touch to talk it through first.