Senior-Lead Python Developer, Product Engineering | Django, FastAPI, TDD, AWS, JavaScript | Building Human Intelligence behind AI | Research + Healthcare | 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.

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.

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

Python (Django core)
FastAPI (in parts)
PostgreSQL
TypeScript / Vue.js
AWS
Modern CI/CD practices

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-Lead Python Developer, Product Engineering | Django, FastAPI, TDD, AWS, JavaScript | Building Human Intelligence behind AI | Research + Healthcare | 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

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 :)

Senior-Lead Python Developer, Product Engineering | Django, FastAPI, TDD, AWS, JavaScript | Building Human Intelligence behind AI | Research + Healthcare | Remote (UK) | £80-100k + Bonus + Equity

Job description

Tech Stack

Why Join

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