Fullstack Software Engineer (Email Security & Anti-Abuse)

Proton seeks a Mid-Senior Fullstack Software Engineer to join its MSA group, focusing on email security, anti-abuse, and AI-driven solutions within a hybrid work model in Geneva.

This position sits within the MSA group, the primary team at Proton dedicated to mail delivery, spam prevention, abuse mitigation, and account security. As the central AI-focused group, the team operates through autonomous units responsible for the entire system lifecycle, ensuring robust protection for the Proton ecosystem.

Responsibilities

• Collaborate with engineers and analysts to design, construct, and maintain core systems.
• Create user-facing features that require both frontend and backend development expertise.
• Oversee the full planning and development lifecycle, potentially acting as a Product or Project Manager.
• Guarantee operational excellence and seamless interaction between systems and features.
• Develop custom solutions using Python, the main Proton API in PHP, React-based web apps, or native mobile applications for iOS and Android.

Requirements

• Strong background in backend development using Python, PHP, or Go.
• Proven experience in frontend design and coding with JavaScript, React, TypeScript, or jQuery.
• Track record of building complex systems for production environments.
• Proficiency in data processing and storage technologies such as MySQL, MongoDB, Redis, Kafka, Elastic, Ceph, or ClickHouse.
• Ability to work independently and lead projects from initial design through to quality assurance.
• Hands-on experience with AI tools and AI agents.
• Excellent written and spoken English communication skills.

Nice to have

• Background in machine learning and real-time prediction systems.
• Experience developing applications for iOS or Android platforms.
• Knowledge of Linux server management, including infrastructure as code with Puppet or Ansible, and containerization practices.

What the company offers

• An office-first culture that encourages in-person collaboration, with the option to work remotely up to 30% of the time.
• All necessary devices and software provided for the role.
• Daily lunch and snacks available at the office.
• Transport cost support via public transport subsidies, bike allowances, or parking spaces.
• Stock options granted upon joining.
• Flexible working hours determined by the employee, with attendance at team meetings required.
• Continuous learning opportunities through training programs, conferences, and events.
• Comprehensive health insurance, competitive retirement savings, generous vacation and leave policies, and wellness programs.

About the company

Proton operates as a community-first organization, shaped by user input and supported by crowdfunding. The company relies solely on user subscriptions for revenue, ensuring that users and the community remain the priority in all decisions. The team values humble, mission-driven individuals with a systems-thinking mindset who aim to make a significant impact in a startup-like environment.

• Community-first approach with direct user input and crowdfunding support.
• Revenue model based exclusively on user subscriptions.
• Focus on users and community in all company actions.
• Seeking humble, mission-driven people with systems-thinking skills.