AI-first Senior Product Engineer

AI-first Senior Product Engineer

Full-Time No working from home possible
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About Mindstone

Mindstone is building the reference company for AI transformation. We live in the future we are building - using AI every day to run the company, then helping others adopt it. Profitable, venture-backed, and growing fast.

The Role

An AI-first, product-minded, deeply hands-on Senior Product Engineer. You will own problems end-to-end: understand the user need, make product and design calls, build across the stack, ship, and measure. Working directly with the CTO.

What You Will Be Doing

  • Shipping features end-to-end across Rebel, used daily by real teams
  • Making autonomous product and technical decisions
  • Working directly with LLMs, agents, and MCP integrations
  • Contributing to our open-screen ecosystem
  • Helping shape engineering standards and culture as the team grows
  • Mentoring and setting the bar for quality

About You - Essential

  • Shipped meaningful product that real people use, recently and repeatedly
  • Think and work AI-first: daily use of Cursor, Claude Code, or equivalent
  • Full-stack in practice: comfortable from backend systems to frontend product
  • Make good product decisions independently, not just technical ones
  • Based in or near London, 2 days/week minimum in office

About You - Bonus

  • TypeScript, Electron, or desktop app experience
  • Built or integrated AI/LLM features in production
  • Previous startup experience (10-50 person team)
  • You have hired or mentored, or want to start

What We Offer

  • Competitive salary + up to 30% monthly bonus tied to company performance
  • Possibility of meaningful equity in a profitable, venture-backed company
  • 25 days holiday plus bank holidays plus Christmas week
  • Quarterly Swarm Weeks across Europe
  • Hybrid London-based - 2 days/week minimum

Diversity and Inclusion

We are committed to building a diverse team and actively encourage applications from candidates of all backgrounds. We particularly welcome applications from underrepresented groups in tech.

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Contact Details:

Moonfire Recruitment Team