Proton Technologies AG is hiring a Backend Engineer for Proton VPN to help build the most trusted VPN in the world and provide a seamless user experience to millions of people while protecting online privacy. Our VPN team focuses on delivering reliable, scalable backend services that enable users to bypass network restrictions in highly censored countries. What you'll do: - Collaborate with a group of Backend Engineers and Architects to design and implement massively scalable back-end solutions for millions of users. - Work with client application developers and product management to ensure the back-end meets critical business and reliability requirements. - Document back-end capabilities and usage so Proton VPN clients can integrate correctly. - Debug and maintain vital systems, including those responsible for cleaning up file revisions and returning quotas to users. Job requirements: - Experience with PHP-based entry-points to a back-end stack. - Experience building scalable solutions. - Experience with profiling methods and tools. - Experience leading a team initiative from discovery to production. - Solid understanding of SQL (MySQL preferred) and data modelling. - Solid understanding of Redis or other caching technologies. - Solid understanding of security best practices. - Solid understanding of HTTP/REST, including both developing and consuming Web-based APIs. - High-level understanding of cryptography concepts such as key exchange and the difference between symmetric and asymmetric encryption. Bonus points: - Operational experience such as SRE or on-call, demonstrat

Proton Technologies AG is hiring a Backend Engineer for Proton VPN to help build the most trusted VPN in the world and provide a seamless user experience to millions of people while protecting online privacy. Our VPN team focuses on delivering reliable, scalable backend services that enable users to bypass network restrictions in highly censored countries. What you'll do: - Collaborate with a group of Backend Engineers and Architects to design and implement massively scalable back-end solutions for millions of users. - Work with client application developers and product management to ensure the back-end meets critical business and reliability requirements. - Document back-end capabilities and usage so Proton VPN clients can integrate correctly. - Debug and maintain vital systems, including those responsible for cleaning up file revisions and returning quotas to users. Job requirements: - Experience with PHP-based entry-points to a back-end stack. - Experience building scalable solutions. - Experience with profiling methods and tools. - Experience leading a team initiative from discovery to production. - Solid understanding of SQL (MySQL preferred) and data modelling. - Solid understanding of Redis or other caching technologies. - Solid understanding of security best practices. - Solid understanding of HTTP/REST, including both developing and consuming Web-based APIs. - High-level understanding of cryptography concepts such as key exchange and the difference between symmetric and asymmetric encryption. Bonus points: - Operational experience such as SRE or on-call, demonstrat