Senior Full Stack Engineer (Agentic AI) - B2B contract
Summary
First engineer on a new client engagement at hedgehog lab, a digital product consultancy: turning client goals into architecture (ADRs), building AI-assisted proofs of concept, and setting up tooling and guardrails for AI coding agents. Core stack is full-stack TypeScript or Python (NestJS/FastAPI) with heavy AI-agent use.
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.