Full Stack Engineer

🚀 Full-Stack Engineer (Mid to Senior) 📍 London, Hybrid💰 £110K–£185K base depending on level + early-stage equity 🧠 Live digital twinsThe companyEarly-stage AI startup, well-funded with a founding team from one of the most talked-about AI companies in the world.They build live digital twins of enormous real-world systems. Huge volumes of fragmented live data gets pulled into a single model that mirrors how the real thing actually behaves, in real time. On top of it you can see what's happening now, simulate what happens next, and act before a small problem becomes an expensive one.It runs inside the organisations that operate at that scale, so it's real from day one.The hard part is the whole job: the inputs are messy, the systems are old, and the model has to stay right while the world keeps moving. Engineering leads the company.The roleYou own the application layer end to end, frontend and backend. You take a rough prototype built in front of a customer and turn it into software people rely on to run the real thing. At a team this small, that's a whole product surface that's yours, not a slice of someone else's.Almost nobody gets that this early.The barYou ship production full-stack software on your own. Strong TypeScript and React, plus a modern backend. You've carried real features to production, and you're good with a customer in the room. Mid-level or senior both work here. What matters is what you've actually shipped, not the number of years next to it.RequirementsYou write and ship production full-stack code unsupervisedStrong TypeScript and React, plus a modern backend (Python, Node, or Go)Solid on relational databases and clean API designNice to haveAI-native product experienceTime in an early-stage startup or another fast, ambiguous, zero-to-one environmentExperience with large-scale systems, simulation, or heavy real-world dataComp and logistics£110K-£185K base depending on level, plus early-stage equityLondon-based, hybrid (3/4 days in office each week but with flexibility where it matters)