Join Proton and help build a better internet where privacy is the default. Proton was founded in 2014 by scientists from CERN, and has since developed the world's largest encrypted email service and expanded into Proton VPN, Proton Drive, Proton Pass, and Proton Calendar. These tools are used by millions globally to protect their freedom, fight censorship, and keep their data safe. Proton is profitable, independent, and hires selectively from the top ~1% of applicants. If you want to do meaningful work with high-caliber people, this is your opportunity.
MSA is a multi-disciplinary group started in 2019 to tackle mail delivery, spam, abuse, and account security problems impacting the Proton ecosystem. The group builds sophisticated systems combining human intelligence and machine learning, making tens of millions of decisions daily. MSA has reduced spam filter misclassifications by over 60%, blocked millions of abusive bulk signups, protected hundreds of thousands of users from account compromise, and mitigated hundreds of DDoS attacks. The group is also the main team at Proton working on AI.
Tasks
- Work with other engineers and analysts to design, build, and operate systems responsible for different domains.
- Develop special user-facing features involving frontend and backend software development.
- Play Product or Project Manager roles and lead the planning and development process.
- Be responsible for the operational excellence of systems/features and their interaction with other systems.
- Work on MSA's custom systems written in Python, the main Proton API written in PHP, Proton Web apps written in React, or native iOS and Android mobile apps.
Requirements
- Deep experience with backend development (Python, PHP, or Go).
- Experience with frontend design and development (JavaScript, React, Typescript, or jQuery).
- Experience building complex production systems.
- Experience with data processing and storage (MySQL, MongoDB, Redis, Kafka, Elastic, Ceph, ClickHouse).
- Able to work autonomously and lead the whole development process, from design to QA.
- Experience with AI tools and AI agents.
- Excellent English communications, both written and spoken.
- Bonus points for experience with machine learning and real-time prediction systems.
- Bonus points for experience with iOS or Android app development.
- Bonus points for experience with managing Linux servers, including infrastructure as code (Puppet, Ansible) and containerization.
Benefits
- Office First: Offices in Geneva, Zurich, Prague, Barcelona, Paris, London, Vilnius, Skopje, and Taipei, with up to 30% work from home and three core days in the office.
- Technology: All devices and software needed to excel in your role.
- Food: Lunch and snacks provided every day at offices.
- Transport: Support for transport costs through subsidized public transport, bike allowances, or parking spaces based on office location.
- Stock Options: All employees receive stock options when joining Proton.
- Flexible Working: Define your own working hours as long as it works with team meetings.
- Learning and Development: Various learning opportunities, including training programs, conferences, 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: Community-first organization, supported by user subscriptions, with over 100 million people trusting and supporting Proton.
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Über uns
Das Team
MSA is an autonomous, multi-disciplinary group at Proton, responsible for tackling mail delivery, spam, abuse, and account security problems. The team has expertise across infrastructure, data storage, backend, web and mobile apps, machine learning, security, and operational excellence.