Lead Fullstack Engineer

Lead Full Stack Engineer / 12-Month Contract / Outside IR35 | Fully Remote (UK)

Day Rate: £800 per day DOE

Contract Length: 12 months

Location: Fully remote, UK based

IR35 Status: Outside IR35

Start: ASAP

We're partnering with a well-funded, fast-scaling business that's about to kick off a greenfield build. They need a Lead Full Stack Engineer who can help shape the technical direction from day one, not just execute someone else's roadmap.

What You'll Be Doing

• Leading the technical design and build of a new platform from first principles — no legacy constraints, no inherited spaghetti
• Making key decisions on architecture, tooling, and engineering standards that the wider team will follow as they scale
• Building across the full stack — modern frontend framework, robust API layer, cloud-native infrastructure
• Mentoring and setting the technical bar for engineers joining the team as the build progresses
• Working directly with senior stakeholders — this is a role with real influence, not just delivery

What They're Looking For

• Proven experience leading full stack builds, ideally including at least one genuine greenfield project
• Strong commercial experience across modern JavaScript/TypeScript (React/Next.js or similar on the front end; Node.js or equivalent on the back end)
• Solid grounding in cloud infrastructure (AWS, Azure, or GCP) and CI/CD practices
• Comfortable owning architectural decisions and defending them to technical and non-technical stakeholders alike
• A contractor mindset — self-directed, low ego, high output
• Prior experience working Outside IR35 and comfortable operating via your own Ltd company