Site Reliability Engineer (Application Edge)

TL;DR

Site Reliability Engineer (Application Edge): Build, maintain, and scale critical infrastructure for privacy-focused services with an accent on traffic flow management, load balancing, and application service control. Focus on designing resilient systems, automating deployments, optimizing hybrid infrastructure, and ensuring high availability in a security-conscious environment.

Location: Hybrid with offices in Geneva, Zurich, Prague, Barcelona, Paris, London, Vilnius, Skopje, and Taipei; up to 30% remote work allowed.

Company

Proton is a profitable startup founded by CERN scientists, providing privacy-focused open-source services like Proton Mail and Proton VPN to over 100 million users worldwide.

What you will do

• Design, build, and operate resilient application and traffic management systems for critical production services.
• Develop automation tools for deployment, configuration management, and service reliability.
• Ensure availability and performance through load balancing, network optimization, and failure recovery.
• Improve monitoring, alerting, and incident response for high availability and rapid issue resolution.
• Optimize and scale hybrid infrastructure across on-premises and cloud environments.
• 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 equivalent practical experience
• Strong knowledge of networking protocols including TCP/IP, DNS, HTTP/HTTPS
• Experience with high-performance load balancing solutions like HAProxy, Envoy, Traefik.
• Familiarity with Kubernetes and container orchestration in production.
• Software development and automation skills in Python, Rust, or Go.
• Ability to troubleshoot complex production issues across network, application, and system layers.
• Strong security mindset and understanding of secure infrastructure practices.

Nice to have

• Experience with traffic shaping, rate limiting, and DDoS mitigation.
• Expertise in Kubernetes service optimization and management.
• Experience with Infrastructure as Code tools like Terraform or Ansible.
• Familiarity with privacy-focused infrastructure challenges and solutions.

Culture & Benefits

• Office-first culture with flexibility to work from home up to 30% of the time.
• Provided devices and software to excel in the role.
• Daily lunch and snacks at offices.
• Transport support including subsidies and allowances.
• Stock options for all employees.
• Flexible working hours aligned with team meetings.
• Learning and development opportunities including training and conferences.
• Comprehensive health insurance, retirement plans, vacation, and wellness programs.
• Community-first organization with user subscription-based revenue model.

Hiring process

• Highly selective hiring with less than 1% acceptance rate.
• Focus on intelligence, learning potential, and ambition.
• Support for reasonable adjustments during hiring process.