ProtonMail was started by scientists and engineers from CERN in 2013 to make end-to-end encrypted email as easy to use as Gmail. Since then, we have grown to become the world's premier secure email service with over 10 million users and a profitable business model. We are rapidly scaling our talented teams to improve our core email product as well as to build an entire suite of web services that safeguards privacy in the digital age.

While the open nature of email is great for interoperability, accessibility and freedom from centralized control, it also creates challenging email delivery problems. Any server in the world can send email to any other email server. Many systems must work together at ProtonMail to mitigate spam and virus attacks, do proper authentication to prevent email spoofing, and finally deliver email to the right place.

You will join a growing mail delivery team to build and operate sophisticated backend systems that send, receive, and filter email. This team contains a mix of senior software engineers and devops/site reliability engineers.

Your work will directly improve the user experience and digital security of millions of people around the world. You should have extensive experience designing and developing scalable and highly-available systems.

What you will do:

• Improve our mail delivery pipeline (MTA, milters, custom anti-spam systems)
• Improve and monitor delivery statistics
• Protect users against various attacks such as phishing, list bombing, and spoofing
• Automate, deploy, monitor, and troubleshoot critical mail systems

• Software engineering experience with production systems (Python, PHP, C)
• Experienced with Linux and web technologies (DNS, TLS, SMTP)
• Bonus: worked with production mail systems (Postfix, SpamAssassin)

Why work at ProtonMail?

• Startup culture where everyone’s opinion matters and can have a significant impact
• We work on interesting, challenging problems. Each day you will face a new issue, and there is never a dull moment
• Our rapid growth means there are many opportunities for advancement
• 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 is using Recruitee recruitment platform for more effective hiring and better candidate experience. Your data will be kept confidential and not shared with any third parties.

Keep in mind that you will receive emails from careers@protonmail.recruitee.com email or other addresses on the protonmail.recruitee.com domain.