Senior Product Engineer II (Python) | Building the Human Intelligence Layer Behind AI | Global Impact, High Ownership | Remote (UK) | £80-100k Bonus Equity The Company - AI systems are only as reliable as the data and feedback loops behind them. We’re partnering with a profitable, globally-used technology company building infrastructure that helps global organisations develop more reliable, trustworthy AI systems. Their platform supports teams working across research, healthcare, and enterprise environments - where accuracy, integrity, and real-world performance genuinely matter. The business has been operating successfully for over a decade and is now scaling rapidly due to accelerating demand in AI. With strong product-market fit and significant growth ahead, they’re investing heavily in senior engineering talent to shape the next phase of the platform. The Role - Senior Product Engineer II (Python) | Building the Human Intelligence Layer Behind AI | Global Impact, High Ownership | Remote (UK) | £80-100k Bonus Equity You’ll join a senior, product-focused engineering team working in small high performance teams building high-scale backend systems that sit at the core of the company’s platform. This is a backend-first role (Python ≈70%) with meaningful influence across system design, architecture, and product direction. You’ll operate with real ownership - balancing delivery speed, scalability, and long-term maintainability - while contributing to a platform that underpins critical AI-driven applications globally. What You’ll Be Doing - Senior Product Engineer II (Python) | Building the Human Intelligence Layer Behind AI | Global Impact, High Ownership | Remote (UK) | £80-100k Bonus Equity Designing and owning backend services in Python (Django / FastAPI) Building scalable APIs and workflows supporting global usage Improving reliability, performance, and developer experience Working closely with Product and Design to shape features end-to-end Contributing across the stack when useful (TypeScript exposure) Helping evolve engineering standards as the team scales This is a pragmatic, fast-moving Product Engineering centric environment - but with a strong emphasis on thoughtful engineering. Tech Stack - Senior Product Engineer II (Python) | Building the Human Intelligence Layer Behind AI | Global Impact, High Ownership | Remote (UK) | £80-100k Bonus Equity Python (Django core) FastAPI (in parts) PostgreSQL TypeScript / Vue.js AWS Modern CI/CD practices What They’re Looking For - Senior Product Engineer II (Python) | Building the Human Intelligence Layer Behind AI | Global Impact, High Ownership | Remote (UK) | £80-100k Bonus Equity 4–6 years of professional software engineering experience Strong production-grade Python Experience building scalable backend systems Comfort operating with ambiguity and ownership Product mindset - thinking beyond implementation Clear communicator, collaborative by nature Experience in startup or scale-up environments preferred No degree requirements Exposure to AI systems, research platforms, or data-intensive products is a bonus — not required. Interview Process - Senior Product Engineer II (Python) | Building the Human Intelligence Layer Behind AI | Global Impact, High Ownership | Remote (UK) | £80-100k Bonus Equity 30-minute intro (Engineering & Talent) 60-minute collaborative Python pairing session Product & architecture discussion Final conversation with senior leadership Structured, respectful, and focused on real-world thinking. Why Join - Senior Product Engineer II (Python) | Building the Human Intelligence Layer Behind AI | Global Impact, High Ownership | Remote (UK) | £80-100k Bonus Equity Globally used platform with strong product-market fit Direct impact on how modern AI-enabled systems perform in the real world Senior hiring bar - high quality, low ego Fully remote within the UK, with a London office Engineering team scaling from ~60 → 100 £80–100k base bonus equity Strong benefits package If you’re a senior Python engineer who enjoys building robust, high-scale systems and wants your work to contribute to more reliable, real-world AI applications - this is a genuinely meaningful opportunity. Apply with your CV and we’ll be in touch if there’s alignment :)