Senior Backend Architect - Foundation (PHP/Rust)

Proton in London is seeking a senior backend engineer to design and implement shared libraries and services that power Proton's products. The role primarily uses PHP, with Rust where performance and memory safety matter. You will shape API design and own architectural decisions within a large monorepo.

You will drive security-minded abstractions, write clear docs, and collaborate with product teams to ensure robust, scalable backend systems powering Proton's suite of applications.