Senior iOS Software Engineer - Paris

Proton; Paris; Sur place; EUR 70 000 - 90 000; Plein temps

Avantages offerts par ce poste

Stock options

Health coverage

Generous leave

Transport allowances

Flexible working hours

Résumé du poste

Proton, based in Paris, is looking for a Senior Engineer to join high-impact product teams dedicated to building foundational experiences for privacy-focused products. The role involves collaborating closely with product and design teams to deliver exceptional user experiences on iOS.

The ideal candidate has extensive experience with iOS applications and cares deeply about product quality and usability. The position offers stock options, health coverage, and flexible working hours.

Qualifications

• Extensive experience in building and shipping high-quality iOS applications.
• Strong experience with maintainable, scalable, and testable mobile architectures.
• Experience mentoring engineers and contributing to technical discussions.

Responsabilités

• Join high-impact product teams focused on Proton Account and Meet.
• Collaborate with cross-functional teams to deliver high-quality experiences on Apple platforms.
• Contribute to discussions on product and technical aspects.

Connaissances

iOS application development

Product quality and usability

Scalable and maintainable architectures

Performance and concurrency understanding

Mentoring engineers

Privacy and security knowledge

Rust experience

Description du poste

Proton was founded in 2014 by scientists from CERN on a simple truth: privacy is a fundamental human right. Since then, we’ve built the world’s largest encrypted email service (Proton Mail) and expanded into Proton VPN, Proton Drive, Proton Pass, and Proton Calendar—tools used by millions globally to protect their freedom, fight censorship, and keep their data safe. In some situations, Proton has literally helped save lives! We are profitable, independent, and selectively hire from the top 1% of applicants. Our 500+ team members across 50+ countries come from leading organizations and elite academic backgrounds. We move fast, keep hierarchy light, and prioritize impact over optics. If you want to do meaningful work with exceptionally high‑caliber people, this is it.

The Role

Based in our Paris office, you’ll join one of several high‑impact product teams focused on Proton Account, Lumo, and Meet, helping build the foundational experiences that power Proton’s ecosystem and the next generation of privacy‑first products. From authentication, identity, and account security to privacy‑preserving AI experiences and secure online collaboration tools, you’ll work on technically ambitious products with real‑world impact. As a senior engineer, you’ll collaborate closely with product, design, and engineers across Proton to build and ship high‑quality experiences on Apple platforms, helping define what “great” looks like for privacy‑focused consumer products at scale.

What We Are Looking For

• You have extensive experience building and shipping high‑quality iOS applications
• You care deeply about product quality, usability, and delivering exceptional user experiences
• You have strong experience building maintainable, scalable, and testable mobile architectures
• You are comfortable working across large codebases and collaborating across multiple teams
• You have experience mentoring engineers and raising the technical bar within a team
• You have a strong understanding of performance, concurrency, and mobile memory management
• You are comfortable navigating ambiguity and contributing to product and technical discussions
• Experience with privacy, security, encryption, sync systems, or offline‑first architectures is a strong plus
• Rust experience is a plus, but not required as we continue moving towards a platform‑independent Rust logical core communicating with the iOS application via generic interfaces

What We Offer

• Work that matters: millions of people trust Proton with their privacy. The work you do here is real, and the impact is measurable.
• Stock options: as soon as you join you have a real stake in what we’re building.
• Technology: you’ll get the right hardware and the right software you need to do your best work.
• Learning & development: we invest in your growth because sharp people make us better. Proton is one of the fastest ways to accelerate your career because you’ll be thrown into real challenges, with real ownership, from day one.
• Employee benefits: your wellbeing isn’t an afterthought. We offer strong health coverage, solid retirement options, generous leave, and wellness support so you can bring your best self to work every day.
• In‑person collaboration: amazing things happen when passionate, smart, and purposeful people get together face‑to‑face. With offices across Geneva, Zürich, Barcelona, London and more, you’ll spend most of your time collaborating with people who genuinely care about what they’re building.
• Food: lunch and snacks are on us every day in our offices so you can focus on the work and not on what’s for lunch.
• Transport: getting to the office shouldn’t cost you. We cover public transport, bike allowances, or parking, whichever works for you.
• Flexible working: you own your schedule; set hours that work for you and your team because outcomes matter more than when the clock says you started.