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# Senior Backend Engineer (Account)

- **Company:** Proton AG
- **Location:** Paris, France (Remote available)
- **Experience:** Expert
- **Contract:** Permanent contract
- **Skills:** Application Programming Interfaces (APIs), Python (Programming Language), MySQL, Performance Tuning, Redis, SQL Databases, Openapi, Grafana, Backend, Containerization, Docker
- **Published:** September 3, 2026
- **Apply:** https://fr.indeed.com/viewjob?jk=05ed17ef728e03e7

## About the Role

* Proven experience with back-end development
 * Expertise in building scalable, high-performance solutions
 * Proficiency with profiling techniques and performance optimization tools
 * Experience leading a team initiative from discovery to production
 * Strong understanding of SQL (MySQL preferred) and data modeling best practices
 * Familiarity with Redis or other caching technologies for performance optimization
 * Knowledge of security best practices and experience implementing secure software solutions
 * In-depth understanding of HTTP/REST, including both the development and consumption of web-based APIs
 * Solid grasp of cryptographic concepts, including key exchange, and the distinction between symmetric and asymmetric encryption

Bonus points for:

 * Operational experience such as SRE or on-call, demonstrating ability to diagnose and troubleshoot complex problems for critical systems
 * Experience with Docker or similar containerization technologies
 * Experience with metrics graphing/analysis toolkits such as Grafana and OpenTelemetry
 * Experience with Python and/or Rust
 * Experience with OpenAPI specs or other API documentation frameworks

## Description

As a Backend Engineer you will play a crucial role in developing Proton's most vital services and serving over 100 million users worldwide. We expect you to be customer-centric, continuously learning, passionate about technology and usability. You are an adept at turning technical complexities into seamless user experiences. Effective teamwork, collaboration with Product, Design, APIs, and your team, and data-driven decision-making are essential aspects of this role.