Product Security Engineer (Cybersecurity)

Location: Geneva, Paris, or Barcelona; office-first hybrid setup with three core days in the office and remote work available up to 30% of the time.

Company

Proton develops open-source privacy and security products including Proton Mail, VPN, Calendar, Drive, and Pass for more than 100 million user accounts.

What you will do

• Define the vision and roadmap for product security across the organization.
• Build and grow the product security team and function.
• Act as the primary product security partner for strategy, design, development, and delivery.
• Embed secure architecture and risk-aware practices into product development.
• Create developer-friendly security policies, playbooks, tools, and automated workflows.
• Lead the bug bounty program and shape product roadmaps around security priorities.

Requirements

• 5+ years of experience in application security, preferably in SaaS or privacy-focused environments.
• Experience leading security projects from concept through production and executing remediation plans.
• Hands-on experience with code reviews, penetration testing, or security tooling.
• Ability to translate complex technical details into clear, actionable guidance for different audiences.
• Ability to understand large, complex systems and collaborate through constructive challenge.
• Experience with Linux-based infrastructure and open-source technologies is relevant to the environment.

Nice to have

• Experience with B2B product security features.
• Knowledge of infrastructure security, including hardware, networking, operating systems, and file systems.
• Experience with cryptographic protocols or privacy-centric organizations.
• Experience using open-source code at scale.

Culture & Benefits

• Work in a flat, flexible organization focused on privacy, open source, and community impact.
• Flexible working hours coordinated with team meetings.
• Devices, software, office meals, and location-based transport support are provided.
• Stock options, health insurance, retirement savings options, vacation and leave policies, and wellness programs.
• Training, conferences, events, and ongoing learning opportunities.