Site Reliability Engineer

As a Site Reliability Engineer on the Application Edge team at Proton, you will help build, maintain, and scale the critical infrastructure that powers our privacy‑focused services. You’ll manage user‑facing production infrastructure across on‑premises and cloud environments, ensuring reliable, secure, and high‑performance delivery of Proton’s most critical traffic.

What You Will Do

• Design, build, and operate resilient application and traffic management systems for Proton’s most critical production services.
• 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 related field, or 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).
• Ability to troubleshoot complex production issues across network, application, and system layers.
• 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.

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 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.
• 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: You receive stock options when you join.
• Flexible Working: You can define your own working hours as long as they work with team meetings.
• Learning and Development: We are committed to your professional growth with training programs, conferences, events, and continual learning.
• Employee Benefits: Comprehensive health insurance, retirement savings options, generous vacation and leave policies, and wellness programs.
• Work that Matters: Proton is a community‑first organization built with community input, and our only source of revenue is user subscriptions. We put our users and community first in everything we do.

Our Commitment to Diversity and Inclusion

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