Senior iOS Software Engineer (Privacy)

TL;DR

Senior iOS Software Engineer (iOS/Privacy): Building and optimizing privacy-first mobile applications for Proton Drive and Proton VPN with an accent on secure, scalable mobile architectures and high-quality user experiences. Focus on implementing encrypted sync systems, offline-first architectures, and integrating a platform-independent Rust logical core.

Location: Based in the Vilnius office (Hybrid)

Company

Proton is an independent, privacy-focused company founded by CERN scientists, providing encrypted email, VPN, cloud storage, and calendar services to millions of users globally.

What you will do

• Develop and ship high-quality iOS applications for Proton Drive and Proton VPN.
• Collaborate with product and design teams to define and implement exceptional user experiences at scale.
• Build and maintain scalable, testable, and maintainable mobile architectures.
• Mentor other engineers and elevate the technical standards within the team.
• Work on technically ambitious products with a strong focus on privacy and security.

Requirements

• Extensive experience building and shipping high-quality iOS applications.
• Strong expertise in mobile architectures, concurrency, and mobile memory management.
• Ability to work across large codebases and collaborate effectively with multiple teams.
• Experience mentoring engineers and raising the technical bar.
• Must be based in or able to work from the Vilnius office.

Nice to have

• Experience with privacy, security, encryption, sync systems, or offline-first architectures.
• Experience with Rust.

Culture & Benefits

• Ownership through stock options from day one.
• Comprehensive health coverage, solid retirement options, and generous leave.
• Flexible working hours focusing on outcomes rather than clock-in times.
• In-person collaboration in modern offices with daily free lunch and snacks.
• Transport support including public transport coverage, bike allowances, or parking.