iOS Software Engineer (Payments)
London; Barcelona Join 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 organisations 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. In some cases, Proton’s services have even been instrumental in saving lives by enabling secure and private communications in high-risk situations. Proton is a profitable company that does not rely upon VC funding, supporting over 100 million user accounts with a growing team of over 500 people from over 50 different countries, coming from the world's top companies and universities. We value intelligence, learning potential and ambition in our hiring process. Adaptability is key as we navigate uncharted territories and redefine how business is conducted online. Hiring at Proton is highly selective, with less than 1% of candidates hired. We believe smaller teams of exceptional talent will always prevail over larger teams with lower talent density. You'll have the opportunity to work with many of the world's top minds in their fields, ranging from former international math and science olympiad winners to chess champions. We have a global mindset and big ambitions but remain a start-up at heart. We value empowerment and flexibility and keep our structure flat to keep moving fast and avoid unnecessary politics. Tired of blending into the crowd? Join us and do work you can truly be proud of.Check ouropen-sourceprojectshere! The Payments Team The goal of the Payments team is to enable revenue generation for the entire Proton ecosystem. This comes in the form of introducing new payment methods for users to architecting our client libraries. This team has impact across all of Proton's products and is critical to the success of the business as a whole.
- The Payments Team works to continuously expand the possibilities for users to pay with various payment methods, beyond just plain credit cards or Paypal - we aspire to create the best end to end payments experience for users globally
- The team works in tight collaboration with the Account Team (responsible for the Proton user lifecycle), the Proton Finance team, and every single Business Unit to ensure that plans, promotions and pricing meet user expectations -- we are the most cross-functional team in the business with direct impact on the ecosystem strategy
The Role As an engineer on our iOS team you99ll build and ship features across Proton99s apps on iPhone, working closely with product and engineers across the company to define what 9cgreat9d looks like on Apple platforms. Our codebase is primarily Swift with some Go, and we99re moving to a platform-independent Rust logical core that communicates with Swift via a generic interface, so Rust experience is a strong plus but not essential. Quality is central to the role: you99ll contribute to and maintain our testing stack, including unit tests for business logic, stubbed API tests for pseudo-integration, snapshot tests for UI and XCUITest for end-to-end user flows. You99ll join a team that pairs deep technical expertise with an obsession for simple, usable interfaces, shipping privacy-preserving products used by millions. What we are looking for:
- You have experience in iOS in particular with Swift
- You have a passion for mentoring other engineers and helping them grow
- You are passionate about user interaction, usability, and providing an excellent user experience
- Demonstrated experience driving change within an organisation and leading complex technical projects
- Extensive experience building maintainable and testable code bases, including API design and unit testing techniques
- Extensive experience with concurrent programming and mobile memory management
- A strong grasp of scalable software architecture and software engineering best practices
- An intuition for optimal user experience and design
- Rust experience not required, but a major plus
- Deep understanding ofAPNs, UNUserNotificationCenter and iOS background execution(silent pushes, background app refresh, background URLSession), and how these impact app reliability
- Experience buildingoffline-first data flowswith local persistence (Core Data, SQLite, Realm or similar) and conflict-free sync
What We Offer
- Office First:Collaboration is easier and more effective in person, which is why we have offices in Geneva, Zurich, Prague...
Proton stands for privacy. Always has, always will. Proton is committed to putting people before profits and building a better internet with privacy-first services such as Proton Mail, Proton VPN, and others. The company has more than 500 team members from over 40 nationalities, serving tens of millions of users globally. Proton is one of Europe’s fastest growing tech companies focused on privacy and security.
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