Software Engineer - Back-End (Storage)

Join Proton and build a better internet where privacy is the default

At Proton, we believe that privacy is a fundamental human right and the cornerstone of democracy. Since our inception in 2014, founded by a team of scientists from CERN, we have dedicated ourselves to providing free and open-source technology to millions worldwide, ensuring access to privacy, security, and freedom online.

Our journey began with Proton Mail, the largest secure email service globally, and has since expanded to include Proton VPN, Proton Calendar, Proton Drive, and Proton Pass. These tools empower individuals and organizations to take control of their personal data.

Proton is a profitable company, supporting over 100 million user accounts with a growing team of over 500 people from over 50 different countries, from the world's top companies and universities. We value intelligence, learning potential, and ambition in our hiring process. Adaptability is key as we navigate uncharted territories and redefine how business is conducted online.

Hiring at Proton is highly selective. We believe smaller teams of exceptional talent will always prevail over larger teams with lower talent density. You will have the opportunity to work with many of the world's top minds in their fields.

We have a global mindset and big ambitions but remain a start-up at heart. We value empowerment and flexibility and keep our structure flat to keep moving fast. Tired of blending into the crowd? Join us and do work you can truly be proud of.

Purpose of the role:

Storage is at the very center of everything we do. Whatever needs to be persisted eventually uses our Storage infrastructure. For this we run our storage infrastructure predominantly on-premise in multiple data centers. In this role you will join the Storage Dev team that is responsible to develop and maintain all the software required in the Storage realm. This, among others, includes Storage APIs, Seaweed & Ceph contributions.

What you will do:

Be responsible for the operational excellence of the systems/features and their interaction with other systems

Work closely with a group of Back-End Engineers and Architects to build resilient, massively-scalable solutions for millions of people to rely on

Collaborate with the SRE teams and other stakeholders to ensure that the Storage back-end meets critical business and reliability requirements

Document back-end capabilities and their proper use

Create technical designs and implement them to further develop the platform

Job requirements:

Deep experience with Back-end development (C++, Go, Rust, or PHP)

Experience building complex production systems

Experience with profiling methods and tools

Experience leading a team initiative from discovery to production

Solid understanding of security best practices

High-level understanding of cryptography concepts

Bonus points for:

Experience with storage systems (e.g. Ceph, Seaweed or Tape)

Operational experience such as SRE or on-call, demonstrating ability to diagnose and troubleshoot complex problems for critical systems

Even if you don’t meet all the requirements listed above, but feel you could still be a great fit, please still apply.

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.

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 Pro