or apply directly on Proton's site. We never take the application ourselves.
Is this posting real?
- This role has been open
- 29 days Proton's roles stay open a median of 45 days
- Reposted
- No
- Salary listed
- No 0% of Proton's roles list one
- Ghost-job risk at Proton
- high 59 stale, 7 reposted of 69 open
- Hiring momentum
- 89 roles opened in the last 90 days ↑ up vs. the prior 90 days
- Last confirmed on the employer's board
- 2026-09-17
Measured from postings appearing on and disappearing from Proton's own greenhouse board since 2026-08-03. Full hiring picture for Proton.
About this role
As a Senior Backend Engineer at Proton, you will design and build shared libraries and internal services that are used across all Proton products. You will work primarily in PHP and Rust, focusing on creating abstractions, improving developer experience, and ensuring that the codebase remains navigable and efficient. Collaboration with product teams and other developers is key, as you will help integrate libraries and enforce architectural boundaries within a monorepo environment.
- benefits
- 5/5
- freshness
- 4/5
- career value
- 4/5
- role clarity
- 5/5
- pay transparency
- 0/5
Scored from the posting itself — how clearly the role is described, how much it says about pay and benefits, and how recently it was listed. Not a judgement of Proton as an employer.
What you need
- 5+ years building and operating backend systems in production with a focus on modern PHP
- Working knowledge of Rust or ability to learn quickly
- Genuine taste in API design
- Experience with codebase architecture and module boundaries
- Experience evolving shared code without breaking dependencies
- A security mindset
Nice to have
- Domain-Driven Design experience
- Background in developer tooling or developer experience teams
- Contributions to open source libraries
- Experience migrating codebases between architectures or languages
- Experience with applied cryptography or end-to-end encrypted systems
What you get
- Strong health coverage
- Solid retirement options
- Generous leave
- Wellness support
- Stock options
- In-person collaboration opportunities
Worth weighing
- The role involves working in a monorepo, which requires careful management of module boundaries and dependencies
- The job requires a strong architectural mindset, which may not suit all candidates
- The focus on security means that candidates must have a proactive approach to potential misuse of their code
Summarised from Proton's posting. Read the full original.
Listed by Proton on their greenhouse job board, last confirmed open on 2026-09-17. PitchMeAI is not the employer.
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