Senior Site Reliability Engineer

Job description

A better internet is possible, one that empowers people to choose how their personal information is used. This might seem daunting, or even impossible, but at Proton, building this better internet is what we do every day.

Proton was founded in 2014 by a group of scientists who met at the European Organization for Nuclear Research (CERN). Our first product, Proton Mail, is now the world’s largest encrypted email service. Subsequent Proton products, such as Proton VPN, Proton Calendar, and Proton Drive, use end-to-end encryption that gives our users full control over how and with whom their data is shared.

Today, Proton is making privacy universally accessible to more than 50 million registered users, including journalists, some of the world’s largest organizations, and people in more than 180 countries. Our diverse and dynamic team is made up of more than 400 members representing over 30 different nationalities. While we are based in Geneva, Switzerland, we have offices in Zurich, Prague, London, Vilnius, Skopje, Taipei, and many more employees working remotely around the world.

New York Times journalists, some of the world’s largest corporations, and millions of ordinary citizens use our products so they can choose who, if anyone, sees their information. Join us at one of Europe’s fastest-growing companies to help us solve challenging problems and build new products that will reach hundreds of millions of people. We want to create more than just one of the world’s most impactful tech companies, we want to create a new internet that serves the interests of all people. We need you, your voice, your ideas, and your ambition to make it happen.

Purpose of the role

Proton continues to scale at a rapid pace, and we're looking for experienced Site Reliability Engineers to join our team. As part of Core Engineering, you will be part of a high-impact, high-leverage team building APIs and services used by all of Proton’s products, including Proton Mail, Proton Drive, Proton Calendar, and Proton VPN. We value rapid velocity and quality execution, so as an SRE you will contribute to our continuous automation of toil, enable greater observability of our Core services, and drive and evangelize the four key DORA metrics. You will also help design and implement service improvements for performance and security, relentlessly improve reliability, and facilitate effective incident response, mitigation, and resolution.


What you will do

  • Establish service level objectives for your team and monitor service level indicators
  • Continuously improve our monitoring and observability strategy at the application layer
  • R&D new technologies & processes to optimize our application operations and performance
  • Promote SRE best practices in our application architecture, and in build and deployment pipelines
  • Contribute to work in our security layers

Job requirements

  • BA/BS degree, or equivalent practical working experience (10+ years preferred)
  • Have a software engineering background, or code development experience in one of the following programming languages: PHP, Python, or Go
  • Have knowledge of monitoring and observability tools and techniques
  • Have operational experience with Linux, MySQL, and containers (Docker or Kubernetes)
  • Are able to troubleshoot outages or performance issues in a large distributed environment
  • Have excellent knowledge of performance and security practices
  • Are fluent in English, our working language

Why you should join Proton

  • Be part of a movement - Proton is not just a product or service but a community-driven movement united by a shared vision of online freedom. Our services are open source, audited, and supported by community contributions. We give back to our community by maintaining core encryption libraries and by supporting other organizations furthering the same goals as us.
  • Work with smart and dedicated people - Our team is diverse, collaborative, and tight-knit with people coming from all walks of life, including many of the world’s top academic institutions and organizations, such as MIT, Harvard, Stanford, Caltech, Cambridge, and ETH.
  • Join a strong brand - Our encrypted email service - Proton Mail - has grown to be a staple of online security and privacy. Proton has been featured in multiple popular television and film productions, such as Mr. Robot, Knives Out, Sounds of Metal, and more.
  • Grow with us - We’re one of Europe’s fastest-growing startups, doubling in size every year. Our growth gives you limitless career and educational opportunities as well as the opportunity to work side-by-side with many world-leading experts in their fields.
  • Have your voice heard - We value your opinion and encourage you to speak up and share your ideas and thoughts. At Proton, no problem is someone else’s problem. We collectively strive to do the right thing and be the undisputed best in the world at everything we do.
  • Benefits – these vary by location and type of contract but expect support on your vacation, parental leave, refreshment if working from the office, learning and development opportunities, equity for shared success, flexible working hours and remote work, company events and team building activities.

Proton uses the Recruitee recruitment platform for a more effective hiring process and a better candidate experience. Your data will always be kept confidential and is not shared with any third parties. Keep in mind that you will receive emails from the email address careers@protonmail.recruitee.com or other addresses on the protonmail.recruitee.com domain.


Proton does not accept unsolicited resumes from any sources other than directly from a candidate. Proton will not pay a fee for any placement resulting from the receipt of an unsolicited offer, even in a situation when the relevant candidate is employed by Proton.


By applying to a role at Proton, you acknowledge that we will process and store your personal data for at least the duration of the hiring process and as necessary to enter a contractual relationship with you.