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Senior / Staff Product Engineer (Production Agentic AI)

owen thomas | b corp™ • United Kingdom
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AI Summary

Senior/Product Engineer roles across FinTech, HealthTech and AI-native startups in London, with relocation support from Europe. Build and ship customer-facing products end-to-end, design scalable backend systems, and collaborate directly with founders and Product teams. Strong backend fundamentals in Python/Go/TypeScript, product ownership mindset, startup experience, and ideally production LLM/agentic AI experience required.

Key Highlights
Senior/Product Engineer roles at well-funded London start-ups in FinTech, HealthTech and AI-native spaces
£100k–£200k base salary plus equity, with up to £15k relocation package and family visa sponsorship
Must be currently based in Europe and willing to relocate to London

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Key Responsibilities
Build and ship customer-facing products end-to-end with measurable impact
Design scalable backend systems, APIs, databases and cloud infrastructure
Collaborate directly with founders and Product teams
Take genuine ownership of products from concept through to production
Technical Skills Required
Python Go TypeScript

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Benefits & Perks
Up to £15,000 relocation support
Family visa sponsorship
Equity in well-funded start-ups
Career progression to Staff, Principal and Engineering Leadership

Interested in relocating to United Kingdom? Check out our comprehensive Relocation Jobs in United Kingdom page with detailed relocation packages and benefits.

Nice to Have
Production experience with LLMs, AI agents or agentic AI applications
Zero-to-one product development experience
FinTech, HealthTech or AI-native start-up backgrounds
Experience working in venture-backed, high-growth businesses

Job Description

The Opportunity

We're partnering with several incredibly exciting, well-funded London technology start-ups looking to attract exceptional Senior / Staff Product Engineers from across Europe.

These businesses are building innovative products across FinTech, HealthTech and AI-native technology, with significant investment, ambitious growth plans and high-performing engineering teams.

We're particularly interested in engineers who have worked in fast-moving, product-led start-ups, taken genuine ownership of products from concept through to production, and ideally have experience shipping LLM / Agentic AI features into production.

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Job Overview
Posted Nov 14, 2026
Employment Full-time
Experience Mid-Senior level
Location United Kingdom
Category Programming
Company owen thomas | b corp™
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