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Frontend Engineer (Lumo AI)

Frontend Developer • On-site • Full-time • 📍 Geneva +3

Proton is hiring a Frontend Engineer for Lumo, its privacy-first AI assistant built with zero-access encryption and no server-side logs. Operating from Proton's European data centers and based on open-source language models, Lumo aims to deliver the full power of AI while keeping user conversations completely confidential.

Responsibilities

  • Develop the frontend for Lumo, Proton's privacy-first AI assistant
  • Build interfaces that deliver the power of AI while preserving user privacy
  • Work within a multi-layer encryption pipeline from device to long-term storage
  • Contribute to open-source AI development

Requirements

  • Frontend engineering experience
  • Interest in building privacy-preserving, encrypted products
  • Ability to work with open-source technologies

Nice to have

  • Experience with AI assistants or language-model-based products
  • Familiarity with encryption architectures

Soft skills

Commitment to user privacy as a core principlePassion for technologyTransparency and integrity
Languages: angol