Senior Ios Engineer (Drive) – Proton
Barcelona;
Prague;
Vilnius;
Skopje;
London;
Paris. 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 ****, 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‑source projects here!
Role
Proton is a mobile‑first company, building an Internet that respects privacy and puts people (not advertisers) first. The products you build will impact the lives of millions of users, so a strong emphasis on quality is required. Our team combines deep mathematical and technical knowledge from the world's top research institutions with expertise in building easy‑to‑use user interfaces. Together, we are building the encrypted communication technologies of the future.
Responsibilities
* Get to work with industry standard tools and technologies and help define what great looks like for iOS engineers.
* Work as part of an iOS team building features in all of Proton’s products.
* Collaborate closely with product and engineering teams across the company.
* Develop and maintain 100 % Swift applications.
* Use Alamofire for networking and implement a generic interface for deserialising objects.
* Write unit tests for business logic, stubbed API tests for pseudo‑integration, snapshot tests for UI, and XCUITest for user input sequencing.
Qualifications
* Experience in iOS or macOS development, in particular with Swift (7 + years).
* Passion for mentoring other engineers and helping them grow.
* Strong focus on 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 codebases, including API design and unit testing techniques.
* Extensive experience with multithreading programming and mobile memory management.
* Strong grasp of scalable software architecture and software engineering best practices.
* Intuition for optimal user experience and design.
* Even if you do not meet all the requirements above, you may still be a great fit;
please 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.
* Work 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 support 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, offering training programs, conferences, and continual learning opportunities.
* Employee Benefits: Comprehensive health insurance plans, competitive retirement savings options, generous vacation and leave policies, and wellness programs.
* Work that Matters: Proton is a community‑first organization founded with the support of a crowdfunding campaign and built with community input.
* Revenue Model: To this day, Proton’s only source of revenue is user subscriptions.
Our Commitment to Diversity and Inclusion
At 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, regardless of race, ethnicity, gender, age, sexual orientation, physical ability, or socio‑economic background, feel valued and empowered. We strive to create equal opportunities, promote open dialogue, and support continuous learning to ensure every voice is heard and respected. If you need any extra support or reasonable adjustments during the hiring process, please let your talent partner know.
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