Senior Backend Python Engineer – London

London · In-person

Very competitive base + equity

A well-funded Series A startup in London is building AI agents that help internal teams focus on meaningful work by automating repetitive, admin-heavy finance tasks. These are real products with real users, designed to make work more efficient, less tedious, and more impactful!

This is a high-impact role with direct influence on the core backend systems powering the product. The founders have previous multi-million-dollar exits and are building one of the fastest-moving startups in London

What You’ll Be Doing

• Build core backend services, APIs, and distributed systems in Python
• Design architecture, data flows, and infrastructure foundations
• Own production systems and iterate quickly based on real user feedback
• Work closely with the leadership team on technical direction and product strategy
• Shape backend engineering culture, tooling, and processes as the team scales

⚙️ Tech Stack

Python (FastAPI) · PostgreSQL · Event-driven services · Modern AI frameworks & agent-driven systems · Cursor · AI/ML

Who This Is For

• Senior backend engineers with 5+ years experience in well-funded, high-growth startups
• People comfortable making high-leverage technical decisions in ambiguous environments
• Engineers passionate about AI that improves workflows and frees teams from repetitive work

❌ Not For

• Fully remote candidates
• Early-career engineers or first startup role
• Big-company pace, heavy process, or narrow scope

✨ Why It’s Interesting

• High-impact senior role with equity upside
• Work alongside proven founders with serious ambition and execution speed
• Strong investor backing and real runway
• Opportunity to scale backend systems that transform how internal teams work and make finance less tedious

If building AI systems that help people spend less time on repetitive tasks and more time on meaningful work sounds exciting - pop us your CV and we'll be in touch