Site Reliability Engineer - Application Edge
Proton is hiring a Site Reliability Engineer for its Application Edge team to help build, maintain, and scale the critical infrastructure that powers its privacy-focused services. The team manages user-facing production infrastructure across both on-premises and cloud environments, ensuring reliable, secure, and high-performance delivery of Proton's most critical traffic. It works at the forefront of private infrastructure technology, tackling traffic flow management, load balancing, and application service control at scale using SRE principles.
Responsibilities
- ▹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, configuration management, and service reliability
- ▹Ensure availability and performance through load balancing, network optimization, and failure recovery strategies
- ▹Improve monitoring, alerting, and incident response to maintain high availability and rapid resolution
- ▹Optimize and scale Proton's hybrid infrastructure spanning on-premises and cloud deployments
- ▹Collaborate with product and security teams to implement privacy and data protection best practices
- ▹Document and share knowledge to foster continuous improvement
Requirements
- ▹Bachelor's degree in Computer Science or a similar 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 (HAProxy, Envoy, Traefik)
- ▹Familiarity with Kubernetes and container orchestration in production
- ▹Experience with software development and automation in one or more languages (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
Nice to have
- ▹Hands-on experience with traffic shaping, rate limiting, and DDoS mitigation
- ▹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
Soft skills
What we offer
- ▹Office-first culture with offices in Geneva, Zurich, Prague, Barcelona, Paris, London, Vilnius, Skopje, and Taipei; work from home up to 30% of the time
- ▹All devices and software needed for the role
- ▹Lunch and snacks provided in the offices
- ▹Transport cost support
- ▹Stock options
- ▹Flexible working hours
- ▹Learning and development opportunities
- ▹Comprehensive health insurance, retirement savings, generous leave, and wellness programs
About the company
Proton was founded in 2014 by CERN scientists to provide free, open-source privacy technology (Proton Mail, VPN, Calendar, Drive, Pass) to over 100 million accounts. It is profitable, does not rely on VC funding, and employs over 500 people across 50+ countries.