Job Detail

Location: Geneva, Zurich, San Francisco




Type: Full-time.




Experience: Prior software development experience is necessary




Company Description:

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 5 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.

At ProtonMail, we allocate a lot of resources into the research and development of better cryptographic tools and processes. We are currently the maintainers of OpenPGP.js, the world's most widely used JavaScript cryptography library, and we additionally maintain a cryptography library written in Golang that is used by our mobile and desktop applications. In addition to maintaining and expanding these libraries, ongoing cryptography-related projects include building a key verification system.

The following are required:

• B.S. and/or M.S. in Computer Science or Mathematics (or equivalent)


• Strong background in computer science (algorithms, data structure, software design, reliability, maintainability, etc)


• Strong English communication skills


• Knowledge of JavaScript and/or Golang (the two languages in which our cryptography libraries are written)


• Knowledge of cryptography with experience developing custom crypto libraries


• Well versed in security and with a good understanding of security best practices from an application development standpoint

Why work at ProtonMail:

• Flexible and casual working environment


• Startup culture where everyone matters and can make a big impact


• Work in an ultra-high grow environment solving interesting problems, there is never a boring moment


• Fast growth also means there are many opportunities for rapid advancement


• Do something meaningful. ProtonMail protects freedom-fighters, journalists, and activists. Our work saves lives.


• High potential upside. In addition to highly competitive salaries, key employees can receive valuable employee stock options.


• 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, and not merely an afterthought. Be part of this revolution that is changing the world.

How to apply?

Send your resume to with a description of what you would be most interested in working on at ProtonMail, and why you are interested in working at ProtonMail.

Please include your nationality, current location, and which country or city you are most interested in working in. The options are: Geneva, Zurich, San Francisco