Fullstack Software Engineer (AI-Native)

Proton.ai • cambridge, england • Posted June 29, 2026

About the Role

  • We’re hiring a Senior Fullstack Engineer to ship products end-to-end across our CRM platform for distributors
  • This is a generalist role: any layer of the stack, any type of work — frontend, backend, data, integrations — wherever the user impact is
  • You’ll work closely with PMs, designers, and other engineers to scope, build, and deploy features that distributors feel directly
  • Periodically, you’ll work directly with customers to support onboarding, troubleshoot integrations, and help distributors get the most out of the platform
  • You’ll be the person who can sit with a customer’s IT team, understand how their ERP is configured, and translate that into something Proton can work with. Expect occasional travel to customer sites a few times a year
  • Two things make this role different from a standard fullstack opening:
  • You’re an AI-native operator, not a code writer. Every engineer at Proton uses Claude Code (and other agen...