Principal Engineer

Principal Engineer - Series A Scale Up - Up to £270,000 I'm currently looking for a Principal Engineer to join a high-growth, YC-backed AI startup based in London. It's a hands-on IC role focused primarily on scalable backend systems and genuinely at scale. You'll be working directly with the Head of Engineering and CTO/Co-Founder — your impact will be visible and felt from day one. They're looking for someone who has taken companies from Series A through to Series C on multiple occasions; someone who has walked into complex, high-pressure environments, diagnosed the problems, fixed them, and unlocked the next phase of growth. This is about scaling products, not just teams. Tech Stack: Python · FastAPI · React · TypeScript · GCP Salary: £190,000 - £270,000 + Equity Working Arrangements: 3 days per week in Central London office Why it might interest you YC-backed and scaling fast, adding 10 heads to engineering over the next few monthsReal AI in production (not just R&D)Smart, driven team of builders — ex-Meta, Spotify, MIT, and high-growth startupsLarge Series A investment already secured + up to 9 million in ARR Ideal profile – Computer science background – Strong, demonstrable signal of impact in previous roles – Experience taking companies from Series A through to Series C – A track record of fixing hard systems problems that unlocked scale – Have real hands-on Python experience If this sounds like a fit, please get in touch. Principal Engineer - Series A Scale Up - Up to £270,000