AI-First Product Engineer: Build Real AI Features

Moonfire; Greater London; Hybrid; GBP 70,000 - 110,000; Full time

Benefits offered by this job

Competitive salary

25 days holiday

Quarterly Swarm Weeks

Hybrid London-based

Real ownership and mentorship

Building with AI

Job summary

Mindstone is seeking an AI-native Product Engineer in London, joining a hybrid, high-growth team at the forefront of AI transformation. You’ll build real product features across Rebel end-to-end, work with LLMs, agents, and MCP integrations, and grow through hands-on ownership from day one.

We welcome diverse backgrounds and value curiosity, self-direction, and practical AI experience, with a 2 days/week minimum in London.

Qualifications

• Shipped something with AI: a project, a tool, a prototype - anything real.
• You think AI-first about software: you use Claude, GPT, Cursor, or similar as part of how you work.
• You have some coding ability and are ready to grow fast.
• You are curious, self-directed, and not waiting for permission to build.
• Based in or near London, 2 days/week minimum

Responsibilities

• Building real product features across Rebel end-to-end, with support and guidance from senior engineers
• Working with LLMs, agents, and MCP integrations from day one
• Learning by shipping: we believe the fastest way to grow is to have real ownership
• Contributing to our open-source ecosystem
• Helping shape how a small, high-trust team builds at the frontier of AI

Skills

AI-first thinking

Shipped AI project

Coding ability

Curious & self-directed

London-based availability

Tools

Claude

GPT

Cursor

Job description

Mindstone is seeking an AI-native Product Engineer in London, joining a hybrid, high-growth team at the forefront of AI transformation. You’ll build real product features across Rebel end-to-end, work with LLMs, agents, and MCP integrations, and grow through hands-on ownership from day one.

We welcome diverse backgrounds and value curiosity, self-direction, and practical AI experience, with a 2 days/week minimum in London.