Full Stack Product Engineer (Stealth AI Startup) - London, UK (On-site, 5 days/week)

JR United Kingdom; London; On-site; GBP 70,000 - 100,000; Full time

Job summary

Join a stealth AI startup as a Full Stack Product Engineer and be part of a dynamic team building a user-facing platform. As one of the first engineers, you'll shape product architecture, solve complex technical challenges, and thrive in an agile environment. Your expertise in languages like Python and frameworks like React will be pivotal in driving innovation in AI workflows, all while enjoying a competitive salary and equity in a promising venture.

Benefits

Competitive salary and equity

Work closely with experienced founders

Collaborative team environment

Qualifications

• 3–7+ years of experience as a software engineer working on production-grade applications.
• Experience building platforms or internal tools, ideally in a startup or fast-paced environment.

Responsibilities

• Build end-to-end product features across the stack (frontend, backend, data).
• Work closely with founders and engineers to ship fast and iterate quickly.
• Contribute to a product that leverages AI in practical, real-world workflows.

Skills

Python

FastAPI

React

Next.js

TypeScript

Postgres

Job description

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Full Stack Product Engineer (Stealth AI Startup) ? London, UK (On-site, 5 days/week), london

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Client:

James Chase

Location:

london, United Kingdom

Job Category:

Other

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EU work permit required:

Yes

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Job Views:

3

Posted:

28.06.2025

Expiry Date:

12.08.2025

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Job Description:

Full Stack Product Engineer (Stealth AI Startup) ? London, UK (On-site, 5 days/week)

About the Role

Join a small, high-performing product engineering team at an early-stage AI startup (currently in stealth). As the third engineer on a close-knit London-based platform team, you’ll play a pivotal role in building and iterating on a powerful, user-facing platform from the ground up.

This is an opportunity to help define the architecture and direction of a product with the potential to reshape how AI is deployed in complex business environments. We’re building technology around cutting-edge AI workflows that require deep technical ownership and creativity.

What You’ll Do

• Build end-to-end product features across the stack (frontend, backend, data)
• Work closely with founders and engineers to ship fast, iterate quickly, and influence product direction
• Solve novel technical challenges related to scaling, performance, and usability
• Contribute to a product that leverages AI in practical, real-world workflows

You Might Be a Fit If You Have

• 3–7+ years of experience as a software engineer working on production-grade applications
• Expertise in at least some of our core stack: Python, FastAPI, React, Next.js, TypeScript, Postgres
• A product-minded engineering approach – you care about what gets built and why
• Experience building platforms or internal tools, ideally in a startup or fast-paced environment
• The ability to thrive in an early-stage environment: ambiguity, speed, and autonomy excite you

Why Join Us

• Be part of the foundational team at a well-funded AI startup
• Help define the product, engineering practices, and company culture
• Work closely with experienced founders from top-tier tech backgrounds
• Competitive salary and equity
• Work in-person with a team that values collaboration, speed, and innovation

? Please note: This is an on-site role in London. We are not able to sponsor visas at this time.