Join Proton and build a better internet where privacy is the default

At Proton, we believe that privacy is a fundamental human right and the cornerstone of democracy. Since our inception in 2014, founded by a team of scientists from CERN, we have dedicated ourselves to providing free and open-source technology to millions worldwide, ensuring access to privacy, security, and freedom online.

Our journey began with Proton Mail, the largest secure email service globally, and has since expanded to include Proton VPN, Proton Calendar, Proton Drive, and Proton Pass. These tools empower individuals and organizations to take control of their personal data, break away from Big Tech’s invasive practices, and defeat censorship. Our work impacts hundreds of millions of lives, from activists on the front lines defending freedom to leaders in governments protecting sensitive information. In some cases, Proton’s services have even been instrumental in saving lives by enabling secure and private communications in high-risk situations.

Proton today supports over 100 million user accounts with a growing team of over 500 people from over 50 different countries, from the world's top companies and universities. We value intelligence, learning potential, and ambition in our hiring process. Adaptability is key as we navigate uncharted territories and redefine how business is conducted online. We believe smaller teams of exceptional talent will always prevail over larger teams with lower talent density. Proton has become profitable and reached scale without relying upon VC funding, largely due to superior talent that allows us to do things faster, more creatively, and more efficiently.

We have a global mindset and big ambitions but remain a start-up at heart. We value empowerment and flexibility and keep our structure flat to keep moving fast and avoid unnecessary politics. Tired of blending into the crowd? Join us and do work you can truly be proud of. Check our social media pages to learn more about us: Twitter, Reddit, Instagram.

The role:

You will be responsible for designing, building, maintaining and evolving Proton applications on Windows. This includes not only building the application internals (managing and syncing local and remote state, performing cryptographic operations, etc) but also helping us to build a resilient, scalable application (graceful degradation; log and metrics streams free of personally identifiable information). You will be involved in the entire application lifecycle, including Gitlab configuration, deployments, monitoring and alerting, and operational incident response. While this position is not a "full-stack" position, you will be expected to collaborate with backend engineers to drive any necessary changes and/or new features needed for the Windows experience.

What you will do:

• Be part of a small team working to bring a "privacy by default" solution to our clients on Windows.
• Develop an application that delights a wide range of users, from layperson to technical, and gives confidence that their online privacy is in good hands - while getting the complexity of end-to-end encryption out of the way.
• Invest in testing and automation to improve the team's productivity and software delivery cadence.
• Think critically on how to divide problems into iterations of simpler, composable solutions. Re-evaluate the minimum scope as necessary to meet objectives on-time.
• Insist on high standards for application monitoring and alerting, in order to ensure a smooth customer experience at all times.

We we are looking for:

• Strong experience in .NET development
• Strong experience building and maintaining Desktop Windows applications
• Strong experience with concurrent multi-threaded programming
• Working knowledge of file systems
• Working knowledge of Git
• Bachelor's or master’s degree in a relevant field of study
• Experience with owning and maintaining large software components
• Experience with gradual rollouts and metrics/monitoring/alerting frameworks

Even if you don’t meet all the requirements listed above, but feel you could still be a great fit, please still apply.

What We Offer

• Office First: Collaboration is easier and more effective in person, which is why we have offices in Geneva, Zurich, Prague, Barcelona, Paris, London, Vilnius, Skopje, and Taipei. You can also enjoy working from home up to 30% of the time, while enjoying great company during our three core days in the office. 
• Technology: We provide all the devices and software you need to excel in your role, ensuring you have the best tools at your disposal to achieve your goals.
• Food: Lunch and snacks are provided by Proton every day at our offices.
• Transport: We will always support our employees with transport costs through subsidizing public transport, bike allowances, or parking spaces based on your office location.
• Stock Options: At Proton, we are all owners of the company and you get stock options when you join us.
• Flexible Working: You can define your own working hours as long as it works with team meetings.
• Learning and Development: We are committed to your professional growth. Proton offers various learning opportunities, including training programs, conferences and events, and continual learning.
• Employee Benefits: Comprehensive health insurance plans, competitive retirement savings options, generous vacation and leave policies, and wellness programs.
• Work that Matters: Proton is a community-first organization, started with the support of a crowdfunding campaign and built with community input. To this day, Proton’s only source of revenue is user subscriptions. Over 100 million people trust and support Proton, and we put our users and community first in everything we do. Read more about our impact here.

Our Commitment to Diversity and Inclusion

At Proton, we believe diversity drives innovation and strengthens our mission to provide privacy as a default for all. We are committed to fostering an inclusive environment where all individuals, regardless of race, ethnicity, gender, age, sexual orientation, physical ability, or socio-economic background, feel valued and empowered. We strive to create equal opportunities, promote open dialogue, and support continuous learning to ensure every voice is heard and respected.

If you need any extra support or reasonable adjustments during the hiring process, please let your talent partner know.

Candidate Privacy Notice

When you apply for a position, refer a candidate, or are considered for a role at Proton Technologies AG (Proton, we, us, or our), your information is stored in Greenhouse, in accordance with their Service Privacy Policy. This information is used to evaluate your suitability for the posted position. We also retain this information for consideration for future roles that you may apply for or that we believe may align with your background and skills.

If we no longer have a legitimate business need to process your information, we will either delete or anonymize it. Should you have any inquiries about how we use or manage your information, or if you wish to access, correct, or delete your data, please contact our privacy team at careers@proton.ch.

Proton does not accept unsolicited resumes from any sources other than directly from candidates. We will not pay a fee for any placement resulting from an unsolicited offer, even if the candidate is subsequently hired by Proton.

To learn more about our privacy policy, please visit our privacy policy page.

#LI-ONSITE

Join Proton and build a better internet where privacy is the default

At Proton, we believe that privacy is a fundamental human right and the cornerstone of democracy. Since our inception in 2014, founded by a team of scientists from CERN, we have dedicated ourselves to providing free and open-source technology to millions worldwide, ensuring access to privacy, security, and freedom online.

Our journey began with Proton Mail, the largest secure email service globally, and has since expanded to include Proton VPN, Proton Calendar, Proton Drive, and Proton Pass. These tools empower individuals and organizations to take control of their personal data, break away from Big Tech’s invasive practices, and defeat censorship. Our work impacts hundreds of millions of lives, from activists on the front lines defending freedom to leaders in governments protecting sensitive information. In some cases, Proton’s services have even been instrumental in saving lives by enabling secure and private communications in high-risk situations.

Proton is a profitable company that does not rely upon VC funding, supporting over 100 million user accounts with a growing team of over 500 people from over 50 different countries, from the world's top companies and universities. We value intelligence, learning potential, and ambition in our hiring process. Adaptability is key as we navigate uncharted territories and redefine how business is conducted online.

Hiring at Proton is highly selective, with less than 1% of candidates hired. We believe smaller teams of exceptional talent will always prevail over larger teams with lower talent density. You will have the opportunity to work with many of the world's top minds in their fields, ranging from former international math and science olympiad winners to chess champions.

We have a global mindset and big ambitions but remain a start-up at heart. We value empowerment and flexibility and keep our structure flat to keep moving fast and avoid unnecessary politics. Tired of blending into the crowd? Join us and do work you can truly be proud of. Check our open-source projects here!

The team:

Proton VPN enables millions of people to connect securely and privately, even in places where the internet is restricted or unreliable. Delivering that experience means our service must perform flawlessly under highly variable, real-world conditions.

We are looking for a Senior Performance Engineer to lead our efforts in making Proton VPN the fastest, most resilient, and most reliable VPN service in the world.

You will define and drive the measurement, analysis, and optimization of Proton VPN’s end-to-end performance, across clients, platforms, and global infrastructure. You’ll help ensure that every connection is fast, stable, and private, regardless of where the user is or what network they’re on.

What you will do: 

• Design and own Proton VPN’s performance framework, defining metrics and KPIs that reflect the real-world experience of users (time-to-connect, throughput, latency, stability, reconnection rates, etc.).
• Develop distributed testing systems that simulate real network conditions, including low bandwidth, packet loss, and high-latency scenarios.
• Continuously measure and analyze performance across platforms (desktop, mobile, backend) and regions to identify bottlenecks and regressions.
• Collaborate with backend, R&D, and client teams to optimize protocol handling, connection setup, routing, and encryption performance.
• Create dashboards, reports, and automated alerts to track global performance health.
• Contribute to the design of resilient connectivity strategies that adapt dynamically to variable network conditions.
• Serve as the performance champion within the engineering organization, mentoring others and driving a data-driven performance culture.

Job requirements: 

Technical Skills

• 5+ years of experience in performance engineering or systems QA, ideally in networking, VPNs, or distributed systems.
• Knowledge of network protocols (TCP/IP, UDP, TLS, WireGuard, debugging, manipulating, and performance profiling tools.
• Proven ability to analyze latency, throughput, and stability metrics across multiple layers (client, OS, transport, application).
• Proficiency in Python (or similar scripting language)
• Familiarity with network emulation and simulation tools (e.g., tc/netem, iperf, IPTables/nfTables…).
• Experience with monitoring and observability stacks (Grafana, Prometheus, Loki) and CI/CD pipelines.
• Cross-platform experience with Linux, macOS, Windows, Android, and iOS preferred.

Bonus points for: 

• Experience with Rust/C/C++/System development

Soft Skills

• Analytical and methodical, yet creative in solving complex performance problems.
• Comfortable working with uncertainty and non-deterministic conditions.
• Collaborative mindset, able to work across client, infrastructure, and data teams.
• Strong communication and documentation skills in English.

What We Offer

• Office First: Collaboration is easier and more effective in person, which is why we have offices in Geneva, Zurich, Prague, Barcelona, Paris, London, Vilnius, Skopje, and Taipei. You can also enjoy working from home up to 30% of the time, while enjoying great company during our three core days in the office. 
• Technology: We provide all the devices and software you need to excel in your role, ensuring you have the best tools at your disposal to achieve your goals.
• Food: Lunch and snacks are provided by Proton every day at our offices.
• Transport: We will always support our employees with transport costs through subsidizing public transport, bike allowances, or parking spaces based on your office location.
• Stock Options: At Proton, we are all owners of the company and you get stock options when you join us.
• Flexible Working: You can define your own working hours as long as it works with team meetings.
• Learning and Development: We are committed to your professional growth. Proton offers various learning opportunities, including training programs, conferences and events, and continual learning.
• Employee Benefits: Comprehensive health insurance plans, competitive retirement savings options, generous vacation and leave policies, and wellness programs.
• Work that Matters: Proton is a community-first organization, started with the support of a crowdfunding campaign and built with community input. To this day, Proton’s only source of revenue is user subscriptions. Over 100 million people trust and support Proton, and we put our users and community first in everything we do. Read more about our impact here.

Our Commitment to Diversity and Inclusion

At Proton, we believe diversity drives innovation and strengthens our mission to provide privacy as a default for all. We are committed to fostering an inclusive environment where all individuals, regardless of race, ethnicity, gender, age, sexual orientation, physical ability, or socio-economic background, feel valued and empowered. We strive to create equal opportunities, promote open dialogue, and support continuous learning to ensure every voice is heard and respected.

If you need any extra support or reasonable adjustments during the hiring process, please let your talent partner know.

Candidate Privacy Notice

When you apply for a position, refer a candidate, or are considered for a role at Proton Technologies AG (Proton, we, us, or our), your information is stored in Greenhouse, in accordance with their Service Privacy Policy. This information is used to evaluate your suitability for the posted position. We also retain this information for consideration for future roles that you may apply for or that we believe may align with your background and skills.

If we no longer have a legitimate business need to process your information, we will either delete or anonymize it. Should you have any inquiries about how we use or manage your information, or if you wish to access, correct, or delete your data, please contact our privacy team at careers@proton.ch.

Proton does not accept unsolicited resumes from any sources other than directly from candidates. We will not pay a fee for any placement resulting from an unsolicited offer, even if the candidate is subsequently hired by Proton.

To learn more about our privacy policy, please visit our privacy policy page.

#LI-Onsite

About Proton

Join Proton and build a better internet where privacy is the default

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 (no VC control), 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. Join us and do work you can truly be proud of. Check our open-source projects here!

The team:

Join a world-class Linux engineering team at the forefront of privacy-focused open-source development, where your contributions directly impact millions of users worldwide. Our engineers are passionate problem-solvers who thrive in a fast-paced, collaborative environment, tackling complex technical challenges with creativity and rigor. We value autonomy, technical excellence, and a shared commitment to building software that genuinely makes the world a safer place. If you are driven by purpose and love working alongside exceptionally talented people, you will feel right at home here.

What you will do:

• Design, develop, and maintain robust automated test frameworks and pipelines for Linux-based open-source software

• Write and execute functional, integration, regression, and end-to-end test suites to ensure product reliability and security

• Collaborate closely with developers to define testability requirements and integrate automated tests into CI/CD workflows

• Identify, document, and track software defects, working with engineering teams to drive timely resolution

• Perform exploratory and risk-based testing with a strong focus on privacy, data integrity, and security compliance

• Develop and maintain test infrastructure, including virtual machines, containers, and Linux environment configurations

• Analyze test results, generate reports, and provide actionable insights to improve software quality and release confidence

• Contribute to the continuous improvement of QA processes, tools, and best practices across the engineering organization

• Participate in code reviews for test code, ensuring maintainability, scalability, and adherence to engineering standards

• Stay current with the latest Linux ecosystem developments, testing methodologies, and open-source tooling

What we are looking for:

• 3–5 years of hands-on experience in software test automation, with a strong focus on Linux-based environments

• Solid proficiency in at least one scripting or programming language commonly used for test automation, such as Python, Bash, or Go

• Proven experience designing and maintaining automated test frameworks (e.g., pytest, Robot Framework, or similar)

• Good understanding of CI/CD pipelines and experience integrating automated tests with tools such as GitLab CI, Jenkins, or GitHub Actions

• Familiarity with containerization and virtualization technologies, including Docker, QEMU, or similar tools for test environment management

• Solid knowledge of Linux internals, system administration, and command-line tooling

• Experience with version control systems, particularly Git, and comfort working in an open-source collaborative development model

• Understanding of software security principles and privacy-by-design concepts is a strong plus

• Ability to read and understand application source code to improve test coverage and identify edge cases

• Strong analytical and problem-solving skills, with a structured and detail-oriented approach to quality assurance

• Good communication skills and ability to work effectively in a remote, internationally distributed team

• A genuine passion for open-source software, privacy, and building technology that has a positive impact on society

What We Offer:

• Work that Matters: millions of people trust Proton with their privacy. We answer only to our users — not advertisers, not investors with conflicting agendas, not governments. The work you do here is real, and the impact is measurable. (read more about our impact here)

• Stock Options: at Proton, we all have the opportunity to be owners of the company. From day one, you have a real stake in what we're building. When Proton wins, you win.

• 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 in the same room. With offices across Geneva, Zürich, Barcelona, London and more, you'll spend most of your time collaborating face-to-face 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.

Our Commitment to Diversity and Inclusion

At Proton, we believe diversity drives innovation and strengthens our mission to provide privacy as a default for all. We are committed to fostering an inclusive environment where all individuals, regardless of race, ethnicity, gender, age, sexual orientation, physical ability, or socio-economic background, feel valued and empowered. We strive to create equal opportunities, promote open dialogue, and support continuous learning to ensure every voice is heard and respected.

If you need any extra support or reasonable adjustments during the hiring process, please let your talent partner know.

Candidate Privacy Notice

When you apply for a position, refer a candidate, or are considered for a role at Proton Technologies AG (Proton, we, us, or our), your information is stored in Greenhouse, in accordance with their Service Privacy Policy. This information is used to evaluate your suitability for the posted position. We also retain this information for consideration for future roles that you may apply for or that we believe may align with your background and skills.

If we no longer have a legitimate business need to process your information, we will either delete or anonymize it. Should you have any inquiries about how we use or manage your information, or if you wish to access, correct, or delete your data, please contact our privacy team at careers@proton.ch.

Proton does not accept unsolicited resumes from any sources other than directly from candidates. We will not pay a fee for any placement resulting from an unsolicited offer, even if the candidate is subsequently hired by Proton.

To learn more about our privacy policy, please visit our privacy policy page.

Salary range (Vilnius) - 46.100 - 60.000 EUR gross annual 

#LI-Onsite

About Proton

Join Proton and build a better internet where privacy is the default

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 (no VC control), 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. Join us and do work you can truly be proud of. Check our open-source projects here!

The team:

We're a tight-knit, passionate Android engineering team building privacy-first apps that are trusted by millions of people around the world — and yes, our code is open source, so your work is truly out there making a difference. We move fast, skip the bureaucracy, and genuinely care about what we ship. Whether you're deep in Espresso tests or debating architecture over lunch, you'll be surrounded by people who are as excited about quality as you are. If you love Android, hate flaky tests, and want your work to actually matter — you'll fit right in.

Tech Stack and Tools:

Kotlin, Java, Espresso, UI Automator, Maestro

What you will do:

• Design, develop, and maintain automated test frameworks and pipelines for Proton's Android applications

• Write and execute UI, functional, integration, and end-to-end test suites using modern Android testing tools and best practices

• Work hand-in-hand with Android developers to define testability requirements and embed automated tests into CI/CD workflows

• Hunt down bugs, document them clearly, and collaborate with the team to get them fixed fast

• Perform exploratory and risk-based testing with a sharp eye on privacy, data integrity, and security behavior

• Own and evolve the Android test infrastructure, including emulator farms, device labs, and test environment configurations

• Dig into test results, spot patterns, and turn findings into actionable improvements that raise the quality bar

• Champion QA best practices across the team and help shape how we think about quality at every stage of development

• Review test code with the same rigor as production code — maintainability and scalability matter here

• Keep up with the Android ecosystem, new testing frameworks, and open-source tooling so we're always ahead of the curve

What we are looking for:

• 3–5 years of hands-on experience in Android test automation, ideally on consumer-facing apps with a large user base

• Strong proficiency in Kotlin and/or Java, with solid experience writing clean, maintainable test code

• Proven experience with Android testing frameworks such as Espresso, UI Automator, or Maestro

• Good understanding of CI/CD pipelines and experience integrating Android tests with tools like GitLab CI, GitHub Actions, or similar

• Familiarity with Android emulators, physical device testing, and cloud-based device farms (e.g., Firebase Test Lab)

• Comfortable navigating Android Studio, ADB, and the broader Android development toolchain

• Experience with version control using Git, and a natural fit in an open-source collaborative workflow

• A good nose for security and privacy issues — understanding of privacy-by-design is a real plus

• Ability to read and understand application source code to sharpen test coverage and catch edge cases early

• Sharp analytical mindset with a structured, detail-oriented approach — you don't let things slip through the cracks

• Great communicator who thrives in a remote-friendly, internationally distributed team

• Genuine enthusiasm for open-source software, Android, and building technology that protects people's privacy

What We Offer:

• Work that Matters: millions of people trust Proton with their privacy. We answer only to our users — not advertisers, not investors with conflicting agendas, not governments. The work you do here is real, and the impact is measurable. (read more about our impact here)

• Stock Options: at Proton, we all have the opportunity to be owners of the company. From day one, you have a real stake in what we're building. When Proton wins, you win.

• 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 in the same room. With offices across Geneva, Zürich, Barcelona, London and more, you'll spend most of your time collaborating face-to-face 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.

Our Commitment to Diversity and Inclusion

At Proton, we believe diversity drives innovation and strengthens our mission to provide privacy as a default for all. We are committed to fostering an inclusive environment where all individuals, regardless of race, ethnicity, gender, age, sexual orientation, physical ability, or socio-economic background, feel valued and empowered. We strive to create equal opportunities, promote open dialogue, and support continuous learning to ensure every voice is heard and respected.

If you need any extra support or reasonable adjustments during the hiring process, please let your talent partner know.

Candidate Privacy Notice

When you apply for a position, refer a candidate, or are considered for a role at Proton Technologies AG (Proton, we, us, or our), your information is stored in Greenhouse, in accordance with their Service Privacy Policy. This information is used to evaluate your suitability for the posted position. We also retain this information for consideration for future roles that you may apply for or that we believe may align with your background and skills.

If we no longer have a legitimate business need to process your information, we will either delete or anonymize it. Should you have any inquiries about how we use or manage your information, or if you wish to access, correct, or delete your data, please contact our privacy team at careers@proton.ch.

Proton does not accept unsolicited resumes from any sources other than directly from candidates. We will not pay a fee for any placement resulting from an unsolicited offer, even if the candidate is subsequently hired by Proton.

To learn more about our privacy policy, please visit our privacy policy page.

Salary range (Vilnius) - 48.800 - 54.200 EUR gross annual 

#LI-Onsite

Join Proton and build a better internet where privacy is the default

At Proton, we believe that privacy is a fundamental human right and the cornerstone of democracy. Since our inception in 2014, founded by a team of scientists from CERN, we have dedicated ourselves to providing free and open-source technology to millions worldwide, ensuring access to privacy, security, and freedom online.

Our journey began with Proton Mail, the largest secure email service globally, and has since expanded to include Proton VPN, Proton Calendar, Proton Drive, and Proton Pass. These tools empower individuals and organizations to take control of their personal data, break away from Big Tech’s invasive practices, and defeat censorship. Our work impacts hundreds of millions of lives, from activists on the front lines defending freedom to leaders in governments protecting sensitive information. In some cases, Proton’s services have even been instrumental in saving lives by enabling secure and private communications in high-risk situations.

Proton is a profitable company that does not rely upon VC funding, supporting over 100 million user accounts with a growing team of over 500 people from over 50 different countries, from the world's top companies and universities. We value intelligence, learning potential, and ambition in our hiring process. Adaptability is key as we navigate uncharted territories and redefine how business is conducted online.

Hiring at Proton is highly selective, with less than 1% of candidates hired. We believe smaller teams of exceptional talent will always prevail over larger teams with lower talent density. You will have the opportunity to work with many of the world's top minds in their fields, ranging from former international math and science olympiad winners to chess champions.

We have a global mindset and big ambitions but remain a start-up at heart. We value empowerment and flexibility and keep our structure flat to keep moving fast and avoid unnecessary politics. Tired of blending into the crowd? Join us and do work you can truly be proud of. Check our open-source projects here!

Purpose of the role:  

Proton continues to grow rapidly as increasing numbers of people across the globe seek greater privacy controls of their information online. To accelerate our growth, we are seeking a senior leader to drive engineering for one of our many existing or upcoming Products.

We are seeking a Director of Engineering to one of our existing or upcoming Products. This role involves setting and executing technical strategy, team management, and working closely with your senior product managers counterparts, to ensure high-velocity delivery of new products.

As a key member of the engineering leadership team, you will shape the company’s technical strategy and contribute to Proton’s mission of creating a privacy-centric internet. Each product will have its unique challenges and areas of focus, nevertheless we require all Engineering Directors for our Products to have a demonstrated track record of building and scaling customer facing applications, in either a B2C or B2B context, for millions of users, across multiple platforms (mobile, desktop, backend systems and platforms).

In addition to technical expertise, Engineering Directors as senior leaders within Proton, have excellent communication skills, a business mindset, and a strong sense of empathy for the end customers.

What you will do:

• Setting technical direction and vision for one of our Products
• Lead technical design and platform discussions
• Drive continuous improvement in our DevSecOps practices, and improve lead times and time to market while maintaining exceptional standards of product quality
• Hold yourself and team accountable for timely delivery of scalable, quality-focus user experiences and features
• Develop efficient processes, and motivate your team to operate with high velocity, ownership, and accountability
• Lead through others, and develop the next generation of engineering leaders at Proton
• Inspire, coach, and develop your teams
• Optimize your organizational structure, and continuously raise the bar on hiring
• Build strong relationships with senior leaders, and advance your long-term platform and engineering vision
• Contribute to Proton's technology and open source communities
• Foster an inclusive and diverse environment for your team to show up and give their best each day

Our Tech stack:

• Applied cryptography (PGP, TLS, etc.)
• REST APIs
• Event architectures 
• HTTP networking
• SQL, Redis
• PHP (Symfony), Rust, Python
• iOS, macOS (Swift)
• Android (Kotlin, Jetpack)
• Web (Typescript, React)
• Desktop (C#, Swift)
• Infrastructure: MySQL / Ceph

We need you to have:

• Experience in software engineering in progressively complex roles
• Experience directly leading and managing engineers
• Demonstrable experience as a manager of managers
• A history of collaboration with senior leaders in engineering, product on developing technical and product strategy
• Great empathy and collaboration skills, and even greater resilience
• A curious, passionate, and growth-oriented mindset
• Deep experience as a hands-on software engineer creating well-crafted, maintainable systems
• Mobile-first background (ideally former mobile developer)
• Practical experience leading DevOps and SRE initiatives and driving best practices
• Experience with cryptography preferred
• Bonus points for each of the following:

• • Experience with performance tuning and scaling across client, backend, infrastructure
  • Working closely with C-level executives to align on direction, vision and execution
  • Having both, the experience of operating at global scale with millions of customers but also thriving in the chaotic growth phase of scaling up to reach it.

What We Offer

• Office First: Collaboration is easier and more effective in person, which is why we have offices in Geneva, Zurich, Prague, Barcelona, Paris, London, Vilnius, Skopje, and Taipei. You can also enjoy working from home up to 30% of the time, while enjoying great company during our three core days in the office. 
• Technology: We provide all the devices and software you need to excel in your role, ensuring you have the best tools at your disposal to achieve your goals.
• Food: Lunch and snacks are provided by Proton every day at our offices.
• Transport: We will always support our employees with transport costs through subsidizing public transport, bike allowances, or parking spaces based on your office location.
• Stock Options: At Proton, we are all owners of the company and you get stock options when you join us.
• Flexible Working: You can define your own working hours as long as it works with team meetings.
• Learning and Development: We are committed to your professional growth. Proton offers various learning opportunities, including training programs, conferences and events, and continual learning.
• Employee Benefits: Comprehensive health insurance plans, competitive retirement savings options, generous vacation and leave policies, and wellness programs.
• Work that Matters: Proton is a community-first organization, started with the support of a crowdfunding campaign and built with community input. To this day, Proton’s only source of revenue is user subscriptions. Over 100 million people trust and support Proton, and we put our users and community first in everything we do. Read more about our impact here.

Our Commitment to Diversity and Inclusion

At Proton, we believe diversity drives innovation and strengthens our mission to provide privacy as a default for all. We are committed to fostering an inclusive environment where all individuals, regardless of race, ethnicity, gender, age, sexual orientation, physical ability, or socio-economic background, feel valued and empowered. We strive to create equal opportunities, promote open dialogue, and support continuous learning to ensure every voice is heard and respected.

If you need any extra support or reasonable adjustments during the hiring process, please let your talent partner know.

Candidate Privacy Notice

When you apply for a position, refer a candidate, or are considered for a role at Proton Technologies AG (Proton, we, us, or our), your information is stored in Greenhouse, in accordance with their Service Privacy Policy. This information is used to evaluate your suitability for the posted position. We also retain this information for consideration for future roles that you may apply for or that we believe may align with your background and skills.

If we no longer have a legitimate business need to process your information, we will either delete or anonymize it. Should you have any inquiries about how we use or manage your information, or if you wish to access, correct, or delete your data, please contact our privacy team at careers@proton.ch.

Proton does not accept unsolicited resumes from any sources other than directly from candidates. We will not pay a fee for any placement resulting from an unsolicited offer, even if the candidate is subsequently hired by Proton.

To learn more about our privacy policy, please visit our privacy policy page.

#LI-ONSITE

Join Proton and build a better internet where privacy is the default

At Proton, we believe that privacy is a fundamental human right and the cornerstone of democracy. Since our inception in 2014, founded by a team of scientists from CERN, we have dedicated ourselves to providing free and open-source technology to millions worldwide, ensuring access to privacy, security, and freedom online.

Our journey began with Proton Mail, the largest secure email service globally, and has since expanded to include Proton VPN, Proton Calendar, Proton Drive, and Proton Pass. These tools empower individuals and organizations to take control of their personal data, break away from Big Tech’s invasive practices, and defeat censorship. Our work impacts hundreds of millions of lives, from activists on the front lines defending freedom to leaders in governments protecting sensitive information. In some cases, Proton’s services have even been instrumental in saving lives by enabling secure and private communications in high-risk situations.

Proton is a profitable company that does not rely upon VC funding, supporting over 100 million user accounts with a growing team of over 500 people from over 50 different countries, from the world's top companies and universities. We value intelligence, learning potential, and ambition in our hiring process. Adaptability is key as we navigate uncharted territories and redefine how business is conducted online.

Hiring at Proton is highly selective, with less than 1% of candidates hired. We believe smaller teams of exceptional talent will always prevail over larger teams with lower talent density. You will have the opportunity to work with many of the world's top minds in their fields, ranging from former international math and science olympiad winners to chess champions.

We have a global mindset and big ambitions but remain a start-up at heart. We value empowerment and flexibility and keep our structure flat to keep moving fast and avoid unnecessary politics. Tired of blending into the crowd? Join us and do work you can truly be proud of. Check our open-source projects here!

Purpose of the role: 

As the Engineering Manager for Proton VPN, for the iOS and MacOS team, you lead a team of engineers dedicated to fostering continuous innovation in our applications. Reporting to the Engineering Manager, you will collaborate with cross-functional teams across Proton. Your primary objective is to raise the quality and reliability of our Apple platform products, while ensure Proton VPN keep being extended with new and critical functionalities.

Responsibilities include: 

• Raise and maintain a high engineering bar for iOS and macOS VPN products by diagnosing quality issues, implementing clear processes, and ensuring delivery of robust, reliable features.
• Enhance team efficiency by balancing speed, quality, and developer experience through streamlined processes and structured ways of working.
• Collaborate closely with Product to address quality concerns while delivering on the roadmap.
• Strategically analyse engineering challenges and guide the team in breaking them down into manageable, iterative solutions—adjusting scopes to meet goals quickly without sacrificing quality.
• Ensure transparent communication of priorities, context, and technical decisions within the team and across stakeholders.
• Foster team growth through personalised 1-on-1s, performance evaluations, and career development plans.
• Oversee cross-team projects with R&D, Backend, Infrastructure, QA, and Product to ensure seamless coordination and execution
• Influence and collaborate with internal teams and stakeholders to align engineering efforts with business objectives and Proton’s security mission.

Job requirements:

• Experience managing Mobile teams, delivering Mobile products and navigating complex cross-team efforts.
• Proven track record of improving product quality and implementing processes in a fast-moving environment.
• Experience leading or contributing to release processes and delivering software at scale, ideally in networking, VPN, or other performance-critical domains.
• Strong understanding of mobile-specific engineering challenges and the ability to go deep technically when diagnosing issues.
• Skilled in project management—able to keep initiatives moving, align stakeholders, and ship high-quality releases.
• Clear, concise, and impactful communication skills.
• Comprehensive understanding of the full application lifecycle, from code reviews and CI/CD to deployment and post-release troubleshooting.
• Familiarity with low-level networking concepts (VPN protocols, DNS, TCP/IP) is beneficial.
• Passion for creating an environment where teams are motivated, collaborative, and focused on delivering exceptional user experiences.

What We Offer

• Office First: Collaboration is easier and more effective in person, which is why we have offices in Geneva, Zurich, Prague, Barcelona, Paris, London, Vilnius, Skopje, and Taipei. You can also enjoy working from home up to 30% of the time, while enjoying great company during our three core days in the office. Depending on the role, fully remote positions may also be available.
• Technology: We provide all the devices and software you need to excel in your role, ensuring you have the best tools at your disposal to achieve your goals.
• Food: Lunch and snacks are provided by Proton every day at our offices.
• Transport: We will always support our employees with transport costs through subsidizing public transport, bike allowances, or parking spaces based on your office location.
• Stock Options: At Proton, we are all owners of the company and you get stock options when you join us.
• Flexible Working: You can define your own working hours as long as it works with team meetings.
• Learning and Development: We are committed to your professional growth. Proton offers various learning opportunities, including training programs, conferences and events, and continual learning.
• Employee Benefits: Comprehensive health insurance plans, competitive retirement savings options, generous vacation and leave policies, and wellness programs.
• Work that Matters: Proton is a community-first organization, started with the support of a crowdfunding campaign and built with community input. To this day, Proton’s only source of revenue is user subscriptions. Over 100 million people trust and support Proton, and we put our users and community first in everything we do. Read more about our impact here.

Our Commitment to Diversity and Inclusion

At Proton, we believe diversity drives innovation and strengthens our mission to provide privacy as a default for all. We are committed to fostering an inclusive environment where all individuals, regardless of race, ethnicity, gender, age, sexual orientation, physical ability, or socio-economic background, feel valued and empowered. We strive to create equal opportunities, promote open dialogue, and support continuous learning to ensure every voice is heard and respected.

If you need any extra support or reasonable adjustments during the hiring process, please let your talent partner know.

Candidate Privacy Notice

When you apply for a position, refer a candidate, or are considered for a role at Proton Technologies AG (Proton, we, us, or our), your information is stored in Greenhouse, in accordance with their Service Privacy Policy. This information is used to evaluate your suitability for the posted position. We also retain this information for consideration for future roles that you may apply for or that we believe may align with your background and skills.

If we no longer have a legitimate business need to process your information, we will either delete or anonymize it. Should you have any inquiries about how we use or manage your information, or if you wish to access, correct, or delete your data, please contact our privacy team at careers@proton.ch.

Proton does not accept unsolicited resumes from any sources other than directly from candidates. We will not pay a fee for any placement resulting from an unsolicited offer, even if the candidate is subsequently hired by Proton.

To learn more about our privacy policy, please visit our privacy policy page.

#LI-ONSITE

Join Proton and build a better internet where privacy is the default

At Proton, we believe that privacy is a fundamental human right and the cornerstone of democracy. Since our inception in 2014, founded by a team of scientists from CERN, we have dedicated ourselves to providing free and open-source technology to millions worldwide, ensuring access to privacy, security, and freedom online.

Our journey began with Proton Mail, the largest secure email service globally, and has since expanded to include Proton VPN, Proton Calendar, Proton Drive, and Proton Pass. These tools empower individuals and organizations to take control of their personal data, break away from Big Tech’s invasive practices, and defeat censorship. Our work impacts hundreds of millions of lives, from activists on the front lines defending freedom to leaders in governments protecting sensitive information. In some cases, Proton’s services have even been instrumental in saving lives by enabling secure and private communications in high-risk situations.

Proton is a profitable company that does not rely upon VC funding, supporting over 100 million user accounts with a growing team of over 500 people from over 50 different countries, from the world's top companies and universities. We value intelligence, learning potential, and ambition in our hiring process. Adaptability is key as we navigate uncharted territories and redefine how business is conducted online.

Hiring at Proton is highly selective, with less than 1% of candidates hired. We believe smaller teams of exceptional talent will always prevail over larger teams with lower talent density. You will have the opportunity to work with many of the world's top minds in their fields, ranging from former international math and science olympiad winners to chess champions.

We have a global mindset and big ambitions but remain a start-up at heart. We value empowerment and flexibility and keep our structure flat to keep moving fast and avoid unnecessary politics. Tired of blending into the crowd? Join us and do work you can truly be proud of. Check our open-source projects here!

The Drive Team:

Proton Drive is our end-to-end encrypted cloud storage service that makes privacy simple and accessible. Built on the same security principles that power Proton Mail, Proton Drive ensures that files, photos, and documents remain fully encrypted—both in transit and at rest—so only you can access them. Available on web, desktop, and mobile, it enables users to securely store, share, and collaborate without sacrificing privacy or control. By offering a truly private alternative to Big Tech’s data-driven ecosystems, Proton Drive plays a key role in building an internet where privacy is the default.

The Role:

Proton is a mobile-first company building an Internet that respects privacy and puts people, not advertisers, first. As an engineer on our Apple team you’ll build and ship features across Proton’s apps on iPhone, iPad and macOS, working closely with product and engineers across the company to define what “great” looks like on Apple platforms. Our codebase is primarily Swift with some Go, and we’re moving to a platform-independent Rust logical core that communicates with Swift via a generic interface, so Rust experience is a strong plus. Quality is central to the role: you’ll contribute to and maintain our testing stack, including unit tests for business logic, stubbed API tests for pseudo-integration, snapshot tests for UI and XCUITest for end-to-end user flows. You’ll join a team that pairs deep technical expertise with an obsession for simple, usable interfaces, shipping privacy-preserving products used by millions.

We we are looking for:

• You have experience in iOS or macOS development, in particular with Swift (7+ years)
• You have a passion for mentoring other engineers and helping them grow
• You are passionate about user interaction, usability, and providing an excellent user experience
• Demonstrated experience driving change within an organization and leading complex technical projects
• Extensive experience building maintainable and testable code bases, including API design and unit testing techniques
• Extensive experience with multithreading programming and mobile memory management
• A strong grasp of scalable software architecture and software engineering best practices
• An intuition for optimal user experience and design

Even if you don’t meet all the requirements listed above, but feel you could still be a great fit, please still apply.

What We Offer

• Office First: Collaboration is easier and more effective in person, which is why we have offices in Geneva, Zurich, Prague, Barcelona, Paris, London, Vilnius, Skopje, and Taipei. You can also enjoy working from home up to 30% of the time, while enjoying great company during our three core days in the office. 
• Technology: We provide all the devices and software you need to excel in your role, ensuring you have the best tools at your disposal to achieve your goals.
• Food: Lunch and snacks are provided by Proton every day at our offices.
• Transport: We will always support our employees with transport costs through subsidizing public transport, bike allowances, or parking spaces based on your office location.
• Stock Options: At Proton, we are all owners of the company and you get stock options when you join us.
• Flexible Working: You can define your own working hours as long as it works with team meetings.
• Learning and Development: We are committed to your professional growth. Proton offers various learning opportunities, including training programs, conferences and events, and continual learning.
• Employee Benefits: Comprehensive health insurance plans, competitive retirement savings options, generous vacation and leave policies, and wellness programs.
• Work that Matters: Proton is a community-first organization, started with the support of a crowdfunding campaign and built with community input. To this day, Proton’s only source of revenue is user subscriptions. Over 100 million people trust and support Proton, and we put our users and community first in everything we do. Read more about our impact here.

Our Commitment to Diversity and Inclusion

At Proton, we believe diversity drives innovation and strengthens our mission to provide privacy as a default for all. We are committed to fostering an inclusive environment where all individuals, regardless of race, ethnicity, gender, age, sexual orientation, physical ability, or socio-economic background, feel valued and empowered. We strive to create equal opportunities, promote open dialogue, and support continuous learning to ensure every voice is heard and respected.

If you need any extra support or reasonable adjustments during the hiring process, please let your talent partner know.

Candidate Privacy Notice

When you apply for a position, refer a candidate, or are considered for a role at Proton Technologies AG (Proton, we, us, or our), your information is stored in Greenhouse, in accordance with their Service Privacy Policy. This information is used to evaluate your suitability for the posted position. We also retain this information for consideration for future roles that you may apply for or that we believe may align with your background and skills.

If we no longer have a legitimate business need to process your information, we will either delete or anonymize it. Should you have any inquiries about how we use or manage your information, or if you wish to access, correct, or delete your data, please contact our privacy team at careers@proton.ch.

Proton does not accept unsolicited resumes from any sources other than directly from candidates. We will not pay a fee for any placement resulting from an unsolicited offer, even if the candidate is subsequently hired by Proton.

To learn more about our privacy policy, please visit our privacy policy page.

#LI-ONSITE

Join Proton and build a better internet where privacy is the default

At Proton, we believe that privacy is a fundamental human right and the cornerstone of democracy. Since our inception in 2014, founded by a team of scientists from CERN, we have dedicated ourselves to providing free and open-source technology to millions worldwide, ensuring access to privacy, security, and freedom online.

Our journey began with Proton Mail, the largest secure email service globally, and has since expanded to include Proton VPN, Proton Calendar, Proton Drive, and Proton Pass. These tools empower individuals and organizations to take control of their personal data, break away from Big Tech’s invasive practices, and defeat censorship. Our work impacts hundreds of millions of lives, from activists on the front lines defending freedom to leaders in governments protecting sensitive information. In some cases, Proton’s services have even been instrumental in saving lives by enabling secure and private communications in high-risk situations.

Proton is a profitable company that does not rely upon VC funding, supporting over 100 million user accounts with a growing team of over 500 people from over 50 different countries, from the world's top companies and universities. We value intelligence, learning potential, and ambition in our hiring process. Adaptability is key as we navigate uncharted territories and redefine how business is conducted online.

Hiring at Proton is highly selective, with less than 1% of candidates hired. We believe smaller teams of exceptional talent will always prevail over larger teams with lower talent density. You will have the opportunity to work with many of the world's top minds in their fields, ranging from former international math and science olympiad winners to chess champions.

We have a global mindset and big ambitions but remain a start-up at heart. We value empowerment and flexibility and keep our structure flat to keep moving fast and avoid unnecessary politics. Tired of blending into the crowd? Join us and do work you can truly be proud of. Check our open-source projects here!

The team:

You strive for perfection and are obsessed with details? You are the one that catches the needle in the haystack in no time? You have a strong background in Quality Assurance and good technical skills? You like to work in a young and dynamic environment? Our QA team is looking for you.
This team is part of our VPN department. The team members are spread in different office locations across Europe. They are responsible for raising the quality standards of our native clients on all platforms as well as maintaining, improving and executing test plans. They are working in strict contact with our automation engineers to get repetitive tasks implemented in our automated test suites while focusing on the improvements of the testing process. Also, they work hand-in-hand with the development and product teams and will provide quality feedback on every stage of the software development lifecycle.

Tech Stack and Tools:

Apple, XCode, XCTest

What you will do:

As our iOS Test Automation Engineer, you’ll be the guardian of app quality. You will:

• Design, build, and maintain automated test frameworks and test suites for iOS.

• Collaborate closely with product managers, designers, and developers to ensure features are testable and reliable.

• Integrate test automation into CI/CD pipelines to deliver fast, smooth, and fearless releases.

• Debug, analyze, and triage test failures — helping the team get to the root cause quickly.

• Continuously explore new tools, frameworks, and practices to improve test coverage, speed, and scalability.

What we are looking for:

• 5+ years of test automation experience, with a focus on iOS apps.

• Strong coding skills in Swift (bonus if you know Objective-C too).

• Experience with iOS testing frameworks XCTest/XCUITest.

• Familiarity with CI/CD pipelines (Gitlab, Harbor, Docker).

• A quality-first mindset and a passion for clean, maintainable code.

• Team-player energy — you love collaborating to build products users love.

Bonus points for:

• Experience with device clouds (Firebase Test Lab, BrowserStack, Saucelabs).

• Knowledge of API testing (REST, GraphQL) to validate end-to-end scenarios.

• Experience with performance, load, or accessibility testing for mobile apps.

• Contributions to open-source testing tools or your own side projects.

What We Offer:

• Office First: Collaboration is easier and more effective in person, which is why we have offices in Geneva, Zurich, Prague, Barcelona, Paris, London, Vilnius, Skopje, and Taipei. You can also enjoy working from home up to 30% of the time, while enjoying great company during our three core days in the office. 
• Technology: We provide all the devices and software you need to excel in your role, ensuring you have the best tools at your disposal to achieve your goals.
• Food: Lunch and snacks are provided by Proton every day at our offices.
• Transport: We will always support our employees with transport costs through subsidizing public transport, bike allowances, or parking spaces based on your office location.
• Stock Options: At Proton, we are all owners of the company and you get stock options when you join us.
• Flexible Working: You can define your own working hours as long as it works with team meetings.
• Learning and Development: We are committed to your professional growth. Proton offers various learning opportunities, including training programs, conferences and events, and continual learning.
• Employee Benefits: Comprehensive health insurance plans, competitive retirement savings options, generous vacation and leave policies, and wellness programs.
• Work that Matters: Proton is a community-first organization, started with the support of a crowdfunding campaign and built with community input. To this day, Proton’s only source of revenue is user subscriptions. Over 100 million people trust and support Proton, and we put our users and community first in everything we do. Read more about our impact here.

Our Commitment to Diversity and Inclusion

At Proton, we believe diversity drives innovation and strengthens our mission to provide privacy as a default for all. We are committed to fostering an inclusive environment where all individuals, regardless of race, ethnicity, gender, age, sexual orientation, physical ability, or socio-economic background, feel valued and empowered. We strive to create equal opportunities, promote open dialogue, and support continuous learning to ensure every voice is heard and respected.

If you need any extra support or reasonable adjustments during the hiring process, please let your talent partner know.

Candidate Privacy Notice

When you apply for a position, refer a candidate, or are considered for a role at Proton Technologies AG (Proton, we, us, or our), your information is stored in Greenhouse, in accordance with their Service Privacy Policy. This information is used to evaluate your suitability for the posted position. We also retain this information for consideration for future roles that you may apply for or that we believe may align with your background and skills.

If we no longer have a legitimate business need to process your information, we will either delete or anonymize it. Should you have any inquiries about how we use or manage your information, or if you wish to access, correct, or delete your data, please contact our privacy team at careers@proton.ch.

Proton does not accept unsolicited resumes from any sources other than directly from candidates. We will not pay a fee for any placement resulting from an unsolicited offer, even if the candidate is subsequently hired by Proton.

To learn more about our privacy policy, please visit our privacy policy page.

Salary range (Vilnius) - 55.000 - 71.000 EUR gross annual 

#LI-Onsite

Join Proton and build a better internet where privacy is the default

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 and independent with no VC control. 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. Join us and do work you can truly be proud of. Check our open-source projects here!

The role:

As an engineer on our small Windows VPN team, you will be responsible for designing, building, maintaining, and evolving Proton’s applications on Windows. You will be involved in the entire application lifecycle, from feature design and implementation to CI/CD configuration, deployment, monitoring, and operational incident response. You will collaborate closely with product managers and engineers across the company to deliver privacy‑preserving products used by millions of people worldwide.

Our codebase is primarily written in .NET and WinUI (C#/XAML), and we are building and integrating cross‑platform logical core libraries written in Rust.

Software quality is central to this role. You will help define, maintain, and improve our testing stack, which includes unit tests, integration tests, and automated GUI tests (using FlaUI).

What we are looking for:

• Strong experience in C# and .NET development.

• Strong experience building and maintaining Windows desktop applications using frameworks such as WinUI, WPF, or similar.

• Solid understanding of MVVM architecture, dependency injection, asynchronous programming (async/await), and event‑based messaging patterns.

• Proven ability to write maintainable, well‑tested, and scalable codebases.

• Demonstrated experience driving change within an organization and leading complex technical projects

• A strong understanding of software architecture and engineering best practices.

• An appreciation for user experience and design quality.

• Rust experience is not required but is a significant plus.

• Working knowledge of networking fundamentals (TCP/IP, DNS, routing concepts) and an interest in VPN technologies and protocols.

• Experience with code debugging, profiling, and performance optimization on Windows.

• Familiarity with Git-based workflows, CI/CD pipelines (GitLab) and modern collaborative development practices.

• Experience with gradual rollout, and observability tooling (telemetry, metrics, monitoring and alerting).

Even if you don’t meet every requirement listed above, if you’re passionate about privacy and believe you could be a great fit, we encourage you to apply.

What We Offer

• Office First: Collaboration is easier and more effective in person, which is why we have offices in Geneva, Zurich, Prague, Barcelona, Paris, London, Vilnius, Skopje, and Taipei. You can also enjoy working from home up to 30% of the time, while enjoying great company during our three core days in the office.

• Technology: We provide all the devices and software you need to excel in your role, ensuring you have the best tools at your disposal to achieve your goals.

• Food: Lunch and snacks are provided by Proton every day at our offices.

• Transport: We will always support our employees with transport costs through subsidizing public transport, bike allowances, or parking spaces based on your office location.

• Stock Options: At Proton, we are all owners of the company and you get stock options when you join us.

• Flexible Working: You can define your own working hours as long as it works with team meetings.

• Learning and Development: We are committed to your professional growth. Proton offers various learning opportunities, including training programs, conferences and events, and continual learning.

• Employee Benefits: Comprehensive health insurance plans, competitive retirement savings options, generous vacation and leave policies, and wellness programs.

• Work that Matters: Proton is a community-first organization, started with the support of a crowdfunding campaign and built with community input. To this day, Proton’s only source of revenue is user subscriptions. Over 100 million people trust and support Proton, and we put our users and community first in everything we do. Read more about our impact here.

Our Commitment to Diversity and Inclusion

At Proton, we believe diversity drives innovation and strengthens our mission to provide privacy as a default for all. We are committed to fostering an inclusive environment where all individuals, regardless of race, ethnicity, gender, age, sexual orientation, physical ability, or socio-economic background, feel valued and empowered. We strive to create equal opportunities, promote open dialogue, and support continuous learning to ensure every voice is heard and respected.

If you need any extra support or reasonable adjustments during the hiring process, please let your talent partner know.

Candidate Privacy Notice

When you apply for a position, refer a candidate, or are considered for a role at Proton Technologies AG (Proton, we, us, or our), your information is stored in Greenhouse, in accordance with their Service Privacy Policy. This information is used to evaluate your suitability for the posted position. We also retain this information for consideration for future roles that you may apply for or that we believe may align with your background and skills.

If we no longer have a legitimate business need to process your information, we will either delete or anonymize it. Should you have any inquiries about how we use or manage your information, or if you wish to access, correct, or delete your data, please contact our privacy team at careers@proton.ch.

Proton does not accept unsolicited resumes from any sources other than directly from candidates. We will not pay a fee for any placement resulting from an unsolicited offer, even if the candidate is subsequently hired by Proton.

To learn more about our privacy policy, please visit our privacy policy page.

#LI-ONSITE

Job Overview

World of Tanks Blitz, an online mobile shooter with tens of millions of installs, is looking for a passionate gamer and skilled communicator to join our team. In this role, you will act as the key liaison between the game team and our Ukrainian and Russian-speaking player base across community and media platforms such as Discord, Telegram, Instagram, YouTube, TikTok, and others. You will help strengthen player relationships, grow community engagement and loyalty, support communications around game updates and events, and turn player feedback into actionable insights for the team.

Reports to

Community Team Lead

What will you do?

• Be one of the public faces and voices of World of Tanks Blitz, proactively engaging with players across social and community platforms.
• Build and maintain strong relationships with the Ukrainian and Russian-speaking player community, creating a positive and engaging brand presence.
• Develop and implement community growth strategies to expand reach, increase engagement, and strengthen player loyalty.
• Manage social media and community publications, ensuring timely, relevant, and engaging content across assigned channels.
• Communicate game updates, new features, events, and campaigns clearly and effectively to players.
• Plan and execute community activities, player events, campaigns, and livestream participation.
• Answer general and game-specific questions from players, using your game knowledge to support meaningful interactions.
• Play World of Tanks Blitz regularly to stay informed about gameplay, features, and player experience, and apply this knowledge in community work.
• Support the setup, maintenance, and effective use of communication platforms and community tools.
• Collaborate closely with internal teams and regional offices on communication planning and campaign execution.
• Gather, analyze, and summarize community sentiment and player feedback, and prepare regular reports and digests for internal stakeholders.

What are we looking for?

• 2+ years of proven experience in community management, communications, moderation, or online community development.
• Strong interest in mobile and/or PC games, with a good understanding of gaming communities and player behavior.
• Excellent written and verbal communication skills in Ukrainian and Russian, with the ability to communicate effectively across different audiences, formats, and platforms, while remaining sensitive to regional and cultural nuances.
• English at B1 level or higher.
• Confidence working in multicultural environments and the ability to remain calm, thoughtful, and professional in fast-paced or high-pressure situations, especially in public communication.
• A proactive, responsible, and hands-on attitude, with the ability to manage both strategic and operational tasks.
• Strong collaboration skills, willingness to share knowledge, support teammates, provide constructive feedback, and step in when urgent issues arise.

What additional skills will help you stand out?

• Experience with World of Tanks or other Wargaming titles.
• Familiarity with basic data analysis and sentiment reporting.
• Experience producing or hosting livestreams.
• Working knowledge of livestreaming, audio, and video tools and technologies.

Work mode

• Hybrid (2-3 days of work from the office)

Benefits

Benefits and perks are tailored to the local market and culture. Our benefits in Nicosia include:

• 21 days annual leave (additional days based on years of service: up to 25 days) 
• Additional paid time off (5 Personal Days, Birthday Leave, Marriage Leave, Compassionate Leave) 
• Sick Leave (10 days top-up to statutory allowance per year)
• Maternity Leave (18 weeks top-up to statutory allowance per case)
• Career development and education opportunities within the company
• English Language courses fully covered by the company upon Manager’s approval
• Premium Private Health Care
• Mental well-being program (iFeel)
• Onsite gym and spa
• Free parking close to the Nicosia offices, based on availability
• Free drinks-equipped kitchen in every floor building
• Eurobank benefits (if applicable)
• Employee discounts (e.g. restaurants, bars, etc.)
• Personal Gaming Account 
• Onsite canteen with subsidized prices for food and drinks
• Company events, Social Clubs
• Seniority Awards  
• Referral program - You can recommend the best talents to the company and receive a reward 

Please submit your CV in English to ensure smooth processing and review.

Job Overview

World of Tanks Blitz, an online mobile shooter with tens of millions of installs, is looking for a passionate gamer and skilled communicator to join our team. In this role, you will act as the key liaison between the game team and our Ukrainian and Russian-speaking player base across community and media platforms such as Discord, Telegram, Instagram, YouTube, TikTok, and others. You will help strengthen player relationships, grow community engagement and loyalty, support communications around game updates and events, and turn player feedback into actionable insights for the team.

Reports to

Community Team Lead

What will you do?

• Be one of the public faces and voices of World of Tanks Blitz, proactively engaging with players across social and community platforms.
• Build and maintain strong relationships with the Ukrainian and Russian-speaking player community, creating a positive and engaging brand presence.
• Develop and implement community growth strategies to expand reach, increase engagement, and strengthen player loyalty.
• Manage social media and community publications, ensuring timely, relevant, and engaging content across assigned channels.
• Communicate game updates, new features, events, and campaigns clearly and effectively to players.
• Plan and execute community activities, player events, campaigns, and livestream participation.
• Answer general and game-specific questions from players, using your game knowledge to support meaningful interactions.
• Play World of Tanks Blitz regularly to stay informed about gameplay, features, and player experience, and apply this knowledge in community work.
• Support the setup, maintenance, and effective use of communication platforms and community tools.
• Collaborate closely with internal teams and regional offices on communication planning and campaign execution.
• Gather, analyze, and summarize community sentiment and player feedback, and prepare regular reports and digests for internal stakeholders.

What are we looking for?

• 2+ years of proven experience in community management, communications, moderation, or online community development.
• Strong interest in mobile and/or PC games, with a good understanding of gaming communities and player behavior.
• Excellent written and verbal communication skills in Ukrainian and Russian, with the ability to communicate effectively across different audiences, formats, and platforms, while remaining sensitive to regional and cultural nuances.
• English at B1 level or higher.
• Confidence working in multicultural environments and the ability to remain calm, thoughtful, and professional in fast-paced or high-pressure situations, especially in public communication.
• A proactive, responsible, and hands-on attitude, with the ability to manage both strategic and operational tasks.
• Strong collaboration skills, willingness to share knowledge, support teammates, provide constructive feedback, and step in when urgent issues arise.

What additional skills will help you stand out?

• Experience with World of Tanks or other Wargaming titles.
• Familiarity with basic data analysis and sentiment reporting.
• Experience producing or hosting livestreams.
• Working knowledge of livestreaming, audio, and video tools and technologies.

Work mode

• Full-time employment
• Hybrid (2-3 days of work from the office) 
• This role isn't eligible for relocation & immigration support // Candidates must be legally authorized to work in Poland at the time of application

Type of Contract and Salary

• Employment Contract (umowa o prace)
• The salary range for this role is 12800-16000 PLN gross monthly (The final salary within the range will depend on the candidate’s experience, skills, and performance during the interview. Please note that this salary range applies to Poland; for other locations, it might be different.)

Benefits

Benefits and perks are tailored to the local market and culture. Our benefits in Warsaw include:

• Additional paid time off (5 Personal Days, Birthday Leave) on top of the statutory minimum
• Sick Leave 100% Compensation (10 days per calendar year)
• Career development and education opportunities within the company
• Premium Private Health Care 
• Mental well-being program (iFeel)
• Multisport card
• Personal Gaming Account 
• Company events
• Seniority Awards  
• Referral program - you can recommend the best talents to the Company and receive a reward  

Please submit your CV in English to ensure smooth processing and review.

Job Overview

World of Tanks Blitz, an online mobile shooter with tens of millions of installs, is looking for a passionate gamer and skilled communicator to join our team in Vilnius. In this role, you will act as the key liaison between the game team and our Ukrainian and Russian-speaking player base across community and media platforms such as Discord, Telegram, Instagram, YouTube, TikTok, and others. You will help strengthen player relationships, grow community engagement and loyalty, support communications around game updates and events, and turn player feedback into actionable insights for the team.

Reports to

Community Team Lead

What will you do?

• Be one of the public faces and voices of World of Tanks Blitz, proactively engaging with players across social and community platforms.
• Build and maintain strong relationships with the Ukrainian and Russian-speaking player community, creating a positive and engaging brand presence.
• Develop and implement community growth strategies to expand reach, increase engagement, and strengthen player loyalty.
• Manage social media and community publications, ensuring timely, relevant, and engaging content across assigned channels.
• Communicate game updates, new features, events, and campaigns clearly and effectively to players.
• Plan and execute community activities, player events, campaigns, and livestream participation.
• Answer general and game-specific questions from players, using your game knowledge to support meaningful interactions.
• Play World of Tanks Blitz regularly to stay informed about gameplay, features, and player experience, and apply this knowledge in community work.
• Support the setup, maintenance, and effective use of communication platforms and community tools.
• Collaborate closely with internal teams and regional offices on communication planning and campaign execution.
• Gather, analyze, and summarize community sentiment and player feedback, and prepare regular reports and digests for internal stakeholders.

What are we looking for?

• 2+ years of proven experience in community management, communications, moderation, or online community development.
• Strong interest in mobile and/or PC games, with a good understanding of gaming communities and player behavior.
• Excellent written and verbal communication skills in Ukrainian and Russian, with the ability to communicate effectively across different audiences, formats, and platforms, while remaining sensitive to regional and cultural nuances.
• English at B1 level or higher.
• Confidence working in multicultural environments and the ability to remain calm, thoughtful, and professional in fast-paced or high-pressure situations, especially in public communication.
• A proactive, responsible, and hands-on attitude, with the ability to manage both strategic and operational tasks.
• Strong collaboration skills, willingness to share knowledge, support teammates, provide constructive feedback, and step in when urgent issues arise.

What additional skills will help you stand out?

• Experience with World of Tanks or other Wargaming titles.
• Familiarity with basic data analysis and sentiment reporting.
• Experience producing or hosting livestreams.
• Working knowledge of livestreaming, audio, and video tools and technologies.

Work mode

• Hybrid (2-3 days of work from the office) 
• This role isn't eligible for relocation & immigration support.

The salary range for this role in Vilnius is EUR 3000-3800 monthly gross.

Benefits

Benefits and perks are tailored to the local market and culture. Our benefits in Vilnius include:

• Additional paid time off 
• Sick Leave Compensation
• Pregnancy and Childbirth Leave Benefit  
• Career development and education opportunities within the company
• Meal Allowance
• Premium Private Health Care 
• Mental well-being program (iFeel)
• Perks discounts platform (over 450 exclusive discounts)
• Personal Gaming Account
• Coffee, fruits, and snacks in the office
• Company events 
• Seniority Awards  
• Referral program - You can recommend the best talents to the company and receive a reward  

Please submit your CV in English to ensure smooth processing and review.

Job Overview

World of Tanks Blitz, an online mobile shooter with tens of millions of installs, is looking for a passionate gamer and skilled communicator to join our team. In this role, you will act as the key liaison between the game team and our Ukrainian and Russian-speaking player base across community and media platforms such as Discord, Telegram, Instagram, YouTube, TikTok, and others. You will help strengthen player relationships, grow community engagement and loyalty, support communications around game updates and events, and turn player feedback into actionable insights for the team.

Reports to

Community Team Lead

What will you do?

• Be one of the public faces and voices of World of Tanks Blitz, proactively engaging with players across social and community platforms.
• Build and maintain strong relationships with the Ukrainian and Russian-speaking player community, creating a positive and engaging brand presence.
• Develop and implement community growth strategies to expand reach, increase engagement, and strengthen player loyalty.
• Manage social media and community publications, ensuring timely, relevant, and engaging content across assigned channels.
• Communicate game updates, new features, events, and campaigns clearly and effectively to players.
• Plan and execute community activities, player events, campaigns, and livestream participation.
• Answer general and game-specific questions from players, using your game knowledge to support meaningful interactions.
• Play World of Tanks Blitz regularly to stay informed about gameplay, features, and player experience, and apply this knowledge in community work.
• Support the setup, maintenance, and effective use of communication platforms and community tools.
• Collaborate closely with internal teams and regional offices on communication planning and campaign execution.
• Gather, analyze, and summarize community sentiment and player feedback, and prepare regular reports and digests for internal stakeholders.

What are we looking for?

• 2+ years of proven experience in community management, communications, moderation, or online community development.
• Strong interest in mobile and/or PC games, with a good understanding of gaming communities and player behavior.
• Excellent written and verbal communication skills in Ukrainian and Russian, with the ability to communicate effectively across different audiences, formats, and platforms, while remaining sensitive to regional and cultural nuances.
• English at B1 level or higher.
• Confidence working in multicultural environments and the ability to remain calm, thoughtful, and professional in fast-paced or high-pressure situations, especially in public communication.
• A proactive, responsible, and hands-on attitude, with the ability to manage both strategic and operational tasks.
• Strong collaboration skills, willingness to share knowledge, support teammates, provide constructive feedback, and step in when urgent issues arise.

What additional skills will help you stand out?

• Experience with World of Tanks or other Wargaming titles.
• Familiarity with basic data analysis and sentiment reporting.
• Experience producing or hosting livestreams.
• Working knowledge of livestreaming, audio, and video tools and technologies.

Work mode

• Hybrid (2-3 days of work from the office) 
• This role isn't eligible for relocation & immigration support.

Benefits

Benefits and perks are tailored to the local market and culture. Our benefits in Belgrade include:

• Additional vacation days based on years of service at Wargaming: up to 5 days on top of the statutory minimum
• Additional paid time off (5 Personal Days, Birthday Leave, Marriage Leave, Compassionate Leave)
• Sick Leave Compensation, Maternity Leave Benefits  
• Premium Private Health Insurance
• Career development and education opportunities within the company
• English clubs and platform for learning languages
• Mental well-being program (iFeel)
• Commuting allowance
• Company events
• FitPass membership
• Discounts for employees
• Personal Gaming Account
• Coffee, fruits, and snacks in the office
• On-site canteen with subsidized prices for food and drinks
• Seniority Awards
• Referral program - you can recommend the best talents to the Company and receive a reward

Please submit your CV in English to ensure smooth processing and review.

We are looking for an analytical Operations Manager to lead the supply side of our business in Lithuania, specifically overseeing Driver Growth, Driver Engagement, Fleets, and Vehicles. In a mature market, success depends on maintaining a reliable base of independent partner drivers and fleet partners. This role requires a disciplined approach to analytical forecasting, operational process management, and the financial oversight of large-scale supply programs.

Please note that this is a full-time permanent employment opportunity. The monthly gross salary for this role ranges from 4800€ to 6200€ and will depend on your skills, knowledge, and experience.

With over 200 million customers in 50+ countries, Bolt is one of the fastest-growing tech companies in Europe and Africa. And it's all thanks to our people.

We believe in creating an inclusive environment where everyone is welcome, regardless of race, colour, religion, gender identity, sexual orientation, national origin, age, or disability.

Our ultimate goal is to make cities for people, not cars, and we need your help to achieve this mission!

You will ensure the health of our marketplace by identifying supply trends and market risks. This position is built on three pillars: rigorous program management, efficient operational workflows, and professional partnership management. You will lead a local team and work closely with Regional, Central Operations, Legal, and Public Policy teams to navigate regulatory shifts and implement strategies that protect and grow our supply base.

• Forecasting & Analysis: Lead supply forecasting and review market trends daily to identify performance risks and suggest proactive growth and retention strategies.
• Budget Management: Own the planning and financial execution of supply initiatives, ensuring efficient ROI and disciplined budget allocation.
• Process & Compliance: Oversee core operational workflows—including partner registration, onboarding, and compliance—ensuring they are scalable and adhere to local and EU regulations.
• Partner Value Proposition: Develop and execute local programs that create tangible value for independent partner drivers to increase platform engagement and frequency.
• Fleet Partnership Management: Build and maintain professional relationships with fleet partners. Act as a point of contact to ensure their operational success and long-term loyalty to the Bolt platform.
• Supply Growth: Drive the strategy for attracting and activating new individual partner drivers and fleet partners.
• Regulatory Implementation: Translate legal and policy shifts into operational adjustments, ensuring the business remains ahead of compliance requirements.
• Team Leadership: Lead and develop a high-performing operations team, ensuring multiple workstreams are delivered on time and to a high standard.

• You have 5+ years of experience in Operations, Consulting, Finance, Analytics, or a related analytical role. A background in Finance is a big plus given the scale of budget management required.
• You have at least 2 years of experience leading a team, coordinating complex, interconnected domains.
• You have expert-level proficiency in Excel/Google Sheets. You are comfortable building forecasting models to justify significant financial decisions.
• You have a proven track record in managing complex projects and process-heavy environments with a detail-oriented approach to maintaining operational quality.
• You are a professional communicator able to build trust with external fleet partners and present financial data clearly to senior management.
• You possess a strong sense of ownership and an entrepreneurial attitude, moving with urgency to solve problems without waiting for direction.
• You hold a Bachelor's degree or higher in Business, Finance, Economics, Engineering, or a related analytical field.

Experience is great, but what we really look for is drive, intelligence, and integrity. So even if you don't tick every box, please consider applying!

Play a direct role in shaping the future of mobility.

Impact millions of customers and partners in 600+ cities across 50 countries.

Work in fast-moving autonomous teams with some of the smartest people in the world.

Accelerate your professional growth with unique career opportunities.

Get a rewarding salary and stock option package that lets you focus on doing your best work.

Enjoy the flexibility of working in a hybrid mode with a minimum of 2 days in the office each week to foster strong connections and teamwork.

Take care of your physical and mental health with our wellness perks.

*Some perks may differ depending on your location.

We are looking for an analytical and high-ownership Operations Manager to lead four of our most important domains in Lithuania: Planning & Analysis, Marketplace, Riders, and Trust & Safety. This is a high-impact role at the intersection of strategy and operations, directly supporting how Bolt operates in a key European market.

Please note that this is a full-time permanent employment opportunity. The monthly gross salary for this role ranges from 4800€ to 6200€ and will depend on your skills, knowledge, and experience.

With over 200 million customers in 50+ countries, Bolt is one of the fastest-growing tech companies in Europe and Africa. And it's all thanks to our people.

We believe in creating an inclusive environment where everyone is welcome, regardless of race, colour, religion, gender identity, sexual orientation, national origin, age, or disability.

Our ultimate goal is to make cities for people, not cars, and we need your help to achieve this mission!

You will own the operational strategy across four interconnected pillars. Your focus will be on monitoring city performance, executing rider strategy, and ensuring compliance and safety standards across the platform. You will report to the General Manager and work cross-functionally with Growth Analytics, Central Operations, Legal, and Product teams.

• Performance Tracking & Planning: Monitor and track the business performance of cities within your region. Identify performance risks early and suggest corrective actions based on data.
• Marketplace Optimization: Develop analytical models to optimize marketplace health. Suggest and implement price changes, budget allocations, and competition defense mechanisms to maintain market position.
• Rider Growth: Lead the Rider domain with the primary objective of growing rider activity. Develop local programs to unlock new rider segments and expand Bolt's use cases beyond standard ride-hailing.
• Competition & Trends: Monitor market trends, competitor offerings, and partner earnings to ensure Bolt maintains a competitive advantage.
• Team Leadership: Lead and develop a high-performing operations team, ensuring multiple workstreams are delivered on time and to a high standard.
•  Regulatory Implementation: Work with Legal and Public Policy teams to translate local and EU regulations into scalable operational processes.
•  Advocacy: Navigate local policies and transportation sector trends to ensure internal processes remain compliant and ahead of requirements.

• You have 5+ years of experience in Operations, Consulting, Finance, Analytics, or a related analytical role. Experience working within tech, mobility, or a highly regulated industry is an advantage.
• You have experience managing or leading a team for at least 2 years (a big plus).
• You have an entrepreneurial mindset – you spot opportunities, take ownership, and move with urgency without waiting to be asked.
• You are highly data-driven with excellent numerical skills. You are comfortable developing analytical and decision frameworks in Excel/Google Sheets to support your strategies and suggestions.
•  You have a strong sense of ownership and a hands-on approach. You are a problem-solver who can navigate obstacles independently and stay focused on results.
• You are an excellent communicator in both Lithuanian and English, able to present confidently to senior internal and external audiences.
•  You hold a Bachelor's degree or higher in Economics, Business, Finance, Engineering, or a related analytical field.

Experience is great, but what we really look for is drive, intelligence, and integrity. So even if you don't tick every box, please consider applying!

Play a direct role in shaping the future of mobility.

Impact millions of customers and partners in 600+ cities across 50 countries.

Work in fast-moving autonomous teams with some of the smartest people in the world.

Accelerate your professional growth with unique career opportunities.

Get a rewarding salary and stock option package that lets you focus on doing your best work.

Enjoy the flexibility of working in a hybrid mode with a minimum of 2 days in the office each week to foster strong connections and teamwork.

Take care of your physical and mental health with our wellness perks.

*Some perks may differ depending on your location.

• Have 7+ years’ experience building distributed backend systems
• Know what it takes to make systems fast, reliable and secure and when to prioritise each
• Are fluent in Java, Scala, Python or similar (and curious enough to learn Scala with us)
• Get DevOps, databases (SQL and NoSQL) and love designing APIs that just work
• Have a strong handle on writing clean, documented, version-controlled code
• Take ownership, show initiative and don’t wait to be told
• Are product-minded and always thinking about the end-user impact

Bonus if you’ve worked with:

• Stream processing
• Public cloud infrastructure (AWS, GCP etc.)

You’ll join a senior engineering team that moves fast, thinks big and builds tech used by millions daily. You’ll work on meaningful problems with real impact - in health, privacy and scale. This isn’t just code for the sake of code. This is building the future of personalised health.

#LI-Hybrid #LI-LM12