Senior Back-End Engineer with PHP, Python, and Rust

Join Proton as a Senior Back-End Engineer

At Proton, we are committed to building a better internet where privacy is the default. We are looking for a Senior Back-End Engineer to join our team responsible for Proton Pass and SimpleLogin. This role focuses on the backend side of these products, but the team can also assist the frontend teams.

What You Will Do

• Code in our shared backend framework.
• Work closely with a group of Back-End Engineers and Architects to build resilient, massively-scalable solutions for millions of people.
• Collaborate with teams of client application developers to ensure that the back-end meets critical business and reliability requirements.
• Document back-end capabilities and their proper use so that all Proton clients can implement correctly-functioning solutions.
• Improve vital systems such as those responsible for cleaning up file revisions and returning quota to users.

Job Requirements

• Strong experience with backend development.
• Experience building scalable solutions.
• Fluent with Object-Oriented Programming (OOP) and SOLID principles.
• Fluent with at least one strongly typed language.
• Solid understanding of SQL (MySQL preferred) and data modeling.
• Knowledgeable about unit and functional testing.
• Solid understanding of security best practices.
• Solid understanding of HTTP/REST, including both developing and consuming web-based APIs.

Bonus Points For

• Operational experience such as SRE or on-call, demonstrating the ability to diagnose and troubleshoot complex problems for critical systems.
• Experience with Docker or similar containerization technologies.
• Experience with CI/CD (Gitlab, Jenkins, etc.).
• Experience with backend web frameworks (Symfony, Spring, .NET).
• Experience with modern PHP, Rust, and Python.
• High-level understanding of cryptography concepts such as key exchange and the difference between symmetric and asymmetric encryption.
• Experience with DDD (Domain-Driven Design) and other enterprise patterns.
• Experience with metrics graphing/analysis toolkits such as Grafana and OpenTelemetry.
• Solid understanding of Redis or other caching technologies.
• Experience with OpenAPI specs or other API documentation frameworks.

What We Offer

• Office First: Collaboration is easier and more effective in person, which is why we have offices in Geneva, Zurich, Prague, Barcelona, Paris, London, Vilnius, Skopje, and Taipei. You can also enjoy working from home up to 30% of the time, while enjoying great company during our three core days in the office. Depending on the role, fully remote positions may also be available.
• Technology: We provide all the devices and software you need to excel in your role, ensuring you have the best tools at your disposal to achieve your goals.
• Food: Lunch and snacks are provided by Proton every day at our offices.
• Transport: We will always support our employees with transport costs through subsidizing public transport, bike allowances, or parking spaces based on your office location.
• Stock Options: At Proton, we are all owners of the company and you get stock options when you join us.
• Flexible Working: You can define your own working hours as long as it works with team meetings.
• Learning and Development: We are committed to your professional growth. Proton offers various learning opportunities, including training programs, conferences and events, and continual learning.
• Employee Benefits: Comprehensive health insurance plans, competitive retirement savings options, generous vacation and leave policies, and wellness programs.

Our Commitment to Diversity and Inclusion

At Proton, we believe diversity drives innovation and strengthens our mission to provide privacy as a default for all. We are committed to fostering an inclusive environment where all individuals, regardless of race, ethnicity, gender, age, sexual orientation, physical ability, or socio-economic background, feel valued and empowered. We strive to create equal opportunities, promote open dialogue, and support continuous learning to ensure every voice is heard and respected.

If you need any extra support or reasonable adjustments during the hiring process, please let your talent partner know.

Join us and do work you can truly be proud of. Apply now to be part of a team that values intelligence, learning potential, and ambition.