Sep 14, ****Join Proton and build a better internet where privacy is the defaultProton was founded in **** by scientists from CERN on a simple truth: privacy is a fundamental human right.

Since then, we've built the world's largest encrypted email service (Proton Mail) and expanded into Proton VPN, Proton Drive, Proton Pass, and Proton Calendar—tools used by millions globally to protect their freedom, fight censorship, and keep their data safe.

We are profitable, independent (no VC control), and selectively hire from the top ~1% of applicants.

If you want to do meaningful work with exceptionally high-caliber people, this is it.

Check our open-source projects here !

We aim to provide the best user experience to millions of people around the world willing to take back their online privacy, while providing sophisticated technologies to bypass network restrictions in highly censored countries.What you will do:Work closely with a group of Back-End Engineers and Architects to build resilient, massively-scalable solutions for millions of people to rely onCollaborate with teams of client application developers and product management to ensure that the back-end meets critical business and reliability requirementsDocument back-end capabilities and their proper use so that all Proton VPN clients can implement correctly-functioning solutionsDebug and repair vital systems such as the systems responsible for cleaning up file revisions and returning quota to usersJob requirements:Experience with PHP-based entry-points to a back-end software stackExperience building scalable solutionsExperience with profiling methods and toolsExperience leading a team initiative from discovery to productionSolid understanding of SQL (MySql preferred)



and data modellingSolid understanding of Redis or other caching technologiesSolid understanding of security best practicesSolid understanding of including both developing and consuming Web-based APIsHigh-level understanding of cryptography concepts such as key exchange and the difference between symmetric and asymmetric encryptionOperational experience such as SRE or on-call, demonstrating ability to diagnose and troubleshoot complex problems for critical systemsExperience with Docker or similar containerization technologiesExperience with metrics graphing/analysis toolkits such as Grafana and OpenTelemetryExperience with Python and/or RustExperience with OpenAPI specs or other API documentation frameworksEven if you don't meet all the requirements listed above, but feel you could still be a great fit, please still apply.read more about our impact here )Stock Options: at Proton, we all have the opportunity to be owners of the company.

Technology: you'll get the right hardware and the right software you need to do your best work.Learning & Development: we invest in your growth because sharp people make us better.

We offer strong health coverage, solid retirement options, generous leave, and wellness support so you can bring your best self to work every dayIn-Person Collaboration: Transport: getting to the office shouldn't cost you.

Adaptable Working: you own your schedule.

If you need any extra support or reasonable adjustments during the hiring process, please let your talent partner know.Candidate Privacy NoticeWhen you apply for a position, refer a candidate, or are considered for a role at Proton Technologies AG (Proton, we, us, or our), your information is stored in Greenhouse, in accordance with their Service Privacy Policy.

We also retain this information for consideration for future roles that you may apply for or that we believe may align with your background and skills.If we no longer have a legitimate business need to process your information, we will either delete or anonymize it.

Should you have any inquiries about how we use or manage your information, or if you wish to access, correct, or delete your data, please contact our privacy team at .

A better internet starts with privacy and freedomProton is a community-driven organization providing secure, privacy-focused tools like email, VPN, calendar, and storage, trusted by over 100 million users globally.Technology, Information and Internet Technology, Information and Media

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📌 Backend PHP Engineer (Barcelona)
🏢 Proton
📍 Barcelona