Senior Backend Engineer (Account) at Proton in Genève

Keywords

• PHP
• Symfony
• Rust
• Kubernetes
• Security
• API Design

Summary

Proton seeks a Senior Backend Engineer to build scalable, secure services for over 100 million users. You will help define new architectures and lead initiatives across Proton's core products.

Job Description

Proton is a profitable, VC-independent company founded by CERN scientists, dedicated to providing privacy-focused, open-source technology to millions of users worldwide. As a Senior Backend Engineer on the Account Team, you will play a crucial role in developing vital services that support over 100 million user accounts. You will work with a small team of exceptional talent, contributing to a flat structure that values empowerment, flexibility, and high talent density.

Your tasks

• Contribute to the definition of new, solid architectures for components used across all Proton products.
• Design powerful APIs that enable feature-rich mobile and web applications while maintaining high shipping velocity.
• Develop scalable, high-performance backend solutions using PHP/Symfony and a growing shared codebase in Rust.
• Lead team initiatives from discovery to production, ensuring customer-centric and seamless user experiences.
• Collaborate effectively with Product, Design, and other engineering teams to make data-driven decisions.

Your profile

• Proven experience in back-end development with expertise in building scalable, high-performance solutions.
• Strong understanding of SQL (MySQL preferred) and data modeling best practices.
• Familiarity with caching technologies like Redis and security best practices for secure software.
• In-depth knowledge of HTTP/REST, cryptographic concepts, and key exchange mechanisms.
• Experience with profiling techniques and performance optimization tools.
• Bonus points for experience with Docker, Grafana, OpenTelemetry, Python, or Rust.

What we offer

• Office-first culture with up to 30% remote work and three core days in the office.
• Comprehensive technology support, including all necessary devices and software.
• Daily lunch and snacks provided at offices, plus subsidies for public transport, bike allowances, or parking.
• Stock options, as all employees are owners of the company.