Senior Fullstack Engineer

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.

Purpose of the role:

What you will do:

• Maintain and refactor existing code to provide a stable API for our VPN client applications and infrastructure.
• Collaborate with product owners, designers, QA, and other engineers to take initiatives from ideation to completion.
• Break down large initiatives into smaller milestones to gather stakeholder feedback quickly, allowing us to course-correct immediately.
• Propose the best next steps when initiatives are deadlocked between product and engineering.
• Keep security top-of-mind during design and implementation to ensure we keep our promise of protecting our users' data.
• Demonstrate a growth mindset and team-player attitude by helping the team raise the bar on code quality, architecture, and day-to-day operations.

Job Requirements:

• Strong experience with backend architecture and development.
• Experience working on highly scalable production systems.
• Demonstrated problem-solving and software engineering skills.
• Takes care to ensure that the product always meets user expectations.
• Strong understanding of software engineering best practices, such as SOLID, Design Patterns, TDD, CI/CD.
• Is eager to both learn and share their knowledge by engaging in respectful and constructive conversation.
• Familiarity with modern PHP and the Symfony framework.
• Open source contributions.
• Experience leading complex, highly scalable production systems.
• Experience with data processing and storage (e.g., MySQL, MongoDB, Redis, Kafka, Elastic).
• High-level understanding of cryptography concepts such as key exchange and the difference between symmetric and asymmetric encryption.

Our team's tech stack:

• PHP / Symfony
• MySQL
• Redis
• Typescript
• React
• Docker

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. Depending on the role, fully remote positions may also be available.
• 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 and events, and continual learning.
• 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, started with the support of a crowdfunding campaign and built with community input. To this day, Proton's only source of revenue is user subscriptions. Over 100 million people trust and support Proton, and we put our users and community first in everything we do.

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.