Senior Back-End Engineer (Identity Manager)Barcelona, SpainJoin Proton and build a better internet where privacy is the default.At Proton, we believe that privacy is a fundamental human right and the cornerstone of democracy. Since our inception in 2014, founded by a team of scientists from CERN, we have dedicated ourselves to providing free and open-source technology to millions worldwide, ensuring access to privacy, security, and freedom online.Our journey began with Proton Mail, the largest secure email service globally, and has since expanded to include Proton VPN, Proton Calendar, Proton Drive, and Proton Pass. These tools empower individuals and organizations to take control of their personal data, break away from Big Tech’s invasive practices, and defeat censorship. Our work impacts hundreds of millions of lives, from activists on the front lines defending freedom to leaders in governments protecting sensitive information.Role overviewAs our new Senior Back-End Engineer, you'll join the team responsible for Proton Pass and SimpleLogin. This role focuses on the back-end side of products, but you may also need to give a helping hand to our front-end teams.What you'll doCode in our shared back-end frameworkWork closely with a group of skilled back-end engineers and architects to build resilient, massively-scalable solutions for millions of people to rely onCollaborate with teams of client application developers to ensure that the back-end meets critical business and reliability requirementsDocument back-end capabilities and their proper use so that all Proton clients can implement correctly-functioning solutionsImprove vital systems such as the systems responsible for cleaning up file revisions and returning quota to usersWhat you'll bringStrong experience in back-end developmentExperience building scalable solutionsSkills in OOP and SOLIDFluency in at least one strongly typed languageSolid understanding of SQL (MySQL preferred) and data modellingKnowledge of unit and functional testingSolid understanding of security best practicesUnderstanding of HTTP / REST, including both developing and consuming web-based APIsOperational 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 CI / CD (Gitlab, Jenkins, etc.)Experience with back-end web frameworks (Symfony, Spring, .NET)Experience with modern PHP, Rust, and PythonHigh-level understanding of cryptography concepts such as key exchange and the difference between symmetric and asymmetric encryptionExperience with DDD (Domain-Driven Design) and other enterprise patternsExperience with metrics graphing / analysis toolkits such as Grafana and OpenTelemetrySolid understanding of Redis or other caching technologiesExperience with OpenAPI specs or other API documentation frameworksWhat we offerTechnology: we provide all the devices and software you need to excel in your role, ensuring you have the best tools at your disposal to achieve your goalsLearning & Development: we are committed to your professional growth – Proton offers various learning opportunities, including training programs, conferences/events, and continual learningEmployee Benefits: comprehensive health insurance plans, competitive retirement savings options, generous vacation/leave policies, and wellness programsStock Options: at Proton, we are all owners of the company and you get stock options when you join usIn-Person Collaboration: collaboration is easier and more effective in person, which is why we have offices in various locations – you can enjoy working from home for up to 30% of the time, while enjoying great company culture during our core days in the officeFood: lunch and snacks are provided by Proton every day at our officesTransport: we'll always support our employees with transport costs through subsidizing public transport, bike allowances, or parking spaces based on your office locationFlexible Working: you can define your own working hours as long as it works with team meetingsWork that Matters: Proton is a community-first organization, started with the support of a crowdfunding campaign and built with community input – to this day, Proton’s only source of revenue is user subscriptionsOur commitment to diversity and inclusionAt Proton, we believe diversity drives innovation and strengthens our mission to provide privacy as a default for all. We are committed to fostering an inclusive environment where all individuals feel valued and empowered.If you need any extra support or reasonable adjustments during the hiring process, please let your talent partner know.#J-18808-Ljbffr