Site Reliability 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. 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. 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*
* Purpose of the Role: We embrace SRE principles—automation, reliability, and performance—to develop and operate infrastructure that scales with Proton's growing user base. If you want to thrive in a high-impact role where infrastructure meets privacy, this is an opportunity to contribute to one of the most security-conscious and performance-critical environments in the industry. What You Will Do:
- Develop and maintain automation tools to enhance deployment processes, configuration management, and service reliability.
- Ensure availability and performance of production services through load balancing, network optimization, and failure recovery strategies.
- Improve monitoring, alerting, and incident response to maintain high availability and rapid issue resolution.
- Optimize and scale Proton's hybrid infrastructure, spanning on-premises and cloud-based deployments.
- Collaborate with product and security teams to implement best practices for privacy and data protection at every layer of the stack.
- Document and share knowledge to foster a culture of learning and continuous improvement within the team and beyond. We Need You to Have:
- Bachelor's degree in Computer Science, a similar field, or the equivalent practical experience.
- Strong knowledge of networking, including TCP/IP, DNS, and HTTP/HTTPS traffic management.
- Experience deploying, tuning, and maintaining high-performance load balancing solutions (e.g., HAProxy, Envoy, Traefik).
- Familiarity with Kubernetes and container orchestration in production environments.
- Experience with software development and automation in one or more programming languages (e.g., Python, Rust, Go).
- A strong security mindset, with an understanding of secure infrastructure practices. Bonus Points For:
- Hands-on experience with traffic shaping, rate limiting, and DDoS mitigation strategies.
- Deep expertise in Kubernetes service optimization and management.
- Experience with Infrastructure as Code (Terraform, Ansible, or similar).
- Familiarity with privacy-focused infrastructure challenges and solutions. 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 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