Senior iOS Engineer (Drive)

Prague; Vilnius; London 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 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. 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, 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 will 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 our open-sourceprojects here! The Drive Team: Proton Drive is our end-to-end encrypted cloud storage service that makes privacy simple and accessible. Built on the same security principles that power Proton Mail, Proton Drive ensures that files, photos, and documents remain fully encrypted—both in transit and at rest—so only you can access them. Available on web, desktop, and mobile, it enables users to securely store, share, and collaborate without sacrificing privacy or control. By offering a truly private alternative to Big Tech’s data-driven ecosystems, Proton Drive plays a key role in building an internet where privacy is the default. The Role: Proton is a mobile-first company building an Internet that respects privacy and puts people, not advertisers, first. As an engineer on our Apple team you’ll build and ship features across Proton’s apps on iPhone, iPad and macOS, working closely with product and engineers across the company to define what “great” looks like on Apple platforms. Our codebase is primarily Swift with some Go, and we’re moving to a platform-independent Rust logical core that communicates with Swift via a generic interface, so Rust experience is a strong plus. Quality is central to the role: you’ll 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. You’ll join a team that pairs deep technical expertise with an obsession for simple, usable interfaces, shipping privacy-preserving products used by millions. We we are looking for:

You have experience in iOS or macOS development,

in particular with Swift (7+ years)

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 organization and leading complex technical projects
Extensive experience building maintainable and testable code bases,

including API design and unit testing techniques

Extensive experience with multithreading 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

Even if you don’t meet all the requirements listed above but feel you could still be a great fit, please still apply. What We Offer

Office First: Collaboration is easier and more effective in person,

which is why we have offices in Geneva, Zurich, Prague, Barcelona, Paris, London, Vilnius, Skopje, and Taipei. You can also enjoy working from home up to 30% of the time while enjoying great company during our three core days in the office.

Technology: 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 goals.
Food: Lunch and snacks are provided by Proton every day at our offices.
Transport: We will always support our employees with transport costs through subsidizing public transport bike allowances or parking spaces based on your office location.
Stock Options: At Proton we are all owners of the company and you get stock options when you join us.
Flexible Working: You can define your own working hours as long as it works with team meetings.
Learning and Development: We are committed to your professional growth.

Proton offers various learning opportunities including training programs conferences events continual learning.

Employee Benefits: Comprehensive health insurance plans competitive retirement savings options generous vacation leave policies wellness programs.
Work that Matters: Proton is a community-first organization started with support of crowdfunding campaign built with community input.

to this day Proton’s only source of revenue is user subscriptions. over 100 million people trust support Proton we put users community first everything we do. Our Commitment to Diversity And Inclusion At Proton we believe diversity drives innovation strengthens our mission provide privacy as default for all. We are committed fostering inclusive environment where all individuals regardless race ethnicity gender age sexual orientation physical ability socio-economic background feel valued empowered. We strive create equal opportunities promote open dialogue support continuous learning ensure every voice heard respected. If you need any extra support or reasonable adjustments during hiring process please let your talent partner know. Candidate Privacy Notice When you apply position refer candidate considered role at Proton Technologies AG (Proton we us or our) your information stored Greenhouse accordance their Service Privacy Policy. your information used evaluate suitability posted position also retain information consideration future roles may apply believe align background skills. your information if no longer legitimate business need process information will either delete anonymize it should inquiries about how use manage information wish access correct delete data please contact privacy team careers@proton.ch. because proton does not accept unsolicited resumes from any sources other than directly from candidates we will not pay fee for any placement resulting from unsolicited offer even if candidate subsequently hired by proton because proton does not accept unsolicited resumes from any sources other than directly from candidates we will not pay fee for any placement resulting from unsolicited offer even if candidate subsequently hired by proton because proton does not accept unsolicited resumes from any sources other than directly from candidates we will not pay fee for any placement resulting from unsolicited offer even if candidate subsequently hired by proton because proton does not accept unsolicited resumes from any sources other than directly from candidates we will not pay fee for any placement resulting from unsolicited offer even if candidate subsequently hired by proton because proton does not accept unsolicited resumes from any sources other than directly from candidates we will not pay fee for any placement resulting from unsolicited offer even if candidate subsequently hired by proton because proton does not accept unsolicited resumes from any sources other than directly from candidates we will not pay fee for any placement resulting from unsolicited offer even if candidate subsequently hired by proton because proton does not accept unsolicited resumes from any sources other than directly from candidates we will not pay fee for any placement resulting from unsolicited offer even if candidate subsequently hired by proton because proton does not accept unsolicited resumes from any sources other than directly from candidates we will not pay fee for any placement resulting from unsolicited offer even if candidate subsequently hired by proton because proton does not accept unsolicited resumes from any sources other than directly from candidates we will not pay fee for any placement resulting...", "#LI-ONSITE", "