Senior Full Stack Engineer (Agentic AI) - B2B contract

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.