Site Reliability Engineer

Job description

At Proton, we envision an internet where privacy is the default, and we’re building ways to help all people secure their digital lives and take control of their data. ProtonMail was founded in 2014 by a group of scientists who met at the European Organization for Nuclear Research (CERN). And since its inception, the company has grown at a fast pace and today has over 40 million users.

Our principal product, ProtonMail, is the world’s largest secure email service. Our second product, ProtonVPN, is one of the world’s most popular VPN services. Our vision is to build an internet platform for the protection of digital rights, and we are also developing additional products, including ProtonCalendar, ProtonDrive, and more to come.

Our users include New York Times journalists, some of the world’s largest corporations, and millions of ordinary citizens. The world is adopting our products at an accelerating pace. Whether it’s in New York, or at the front lines of the global struggle for freedom and democracy in Hong Kong, Belarus, and Myanmar, the work we do saves lives and is transforming the world. Our team is diverse and dynamic, representing over 30 different nationalities, with offices in Geneva, Zurich, Prague, London, Vilnius, Skopje, and Taipei, employing people across the world.

Proton is a mission-driven company. We’re deeply committed to enabling freedom online and ensuring the internet serves the interests of all people. Our technologies provide trusted ways for people to be secure online and in control of their information at all times. The world is adopting our products at an accelerating pace. Help us bring it from tens of millions of users to billions of users. We’re creating one of the world’s most impactful tech companies.

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

  • We work on interesting, challenging problems every day. There is never a dull moment.
  • Our startup culture means everyone’s opinion matters. You can have a significant impact.
  • Our rapid growth means there are many opportunities for advancement.
  • The chance to do something meaningful. ProtonMail protects dissidents, journalists, and activists. Our work saves lives.
  • Be part of something bigger. Millions of people and businesses around the world have embraced our idea of an Internet where privacy and security are the default. Join the privacy revolution that is changing the world.

ProtonMail 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.