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 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!

• Our frontend is built with React and Rust
• Our backend API is based on PHP/Symfony
• All our client-code is open-source and GPL3.
• We are migrating our infrastructure to Kubernetes
• Everything runs on premise in Proton's data-centers
• To organize our work we use classic tools such as Jira and Confluence

• Extensive experience with React, developing performant and reusable components
• Proficiency with TypeScript or any typed language
• Experience leading large and complex projects as a front engineer
• Bonus for experience using agentic AI
• Bonus for experience in audio/video app, WebRTC and Messaging Layer Security

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:

• 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)
• 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
• 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.
• 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.

#LI-ONSITE

This role is one of our general tracks. Apply here for all engineering teams at Canonical who work on low-level system technology on autonomous devices across all seniority levels.

We hire careful and conscientious engineers who appreciate the challenge of memory, performance, battery and connectivity constrained code that has to work every time in an unreliable and unforgiving world, on x86, ARM or RISC-V silicon.

Canonical Ubuntu is the leading Linux for software engineers, desktops, cloud and IoT. We bring open source to the world as a high-performance, safe and secure platform for enterprise computing, software engineering, and connected devices.

These smart, connected devices have the potential to transform every industry. Classic Ubuntu – desktop or server – is widely used in embedded systems because of its developer focus and enterprise grade security maintenance. We partner with the world's most prominent silicon companies to optimise Ubuntu on their latest and greatest chips, as well as with major OEMs and ODMs (PC, servers and connected device manufacturers) to ensure that Ubuntu works perfectly on their hardware.

But while classic, ‘deb’ based Ubuntu is ideal for developers, it has too much variability for appliance or connected device environments, where you want to know *exactly* what the state of millions or billions of devices might be. So Canonical builds Ubuntu Core, a fully containerised version of Ubuntu that is mathematically precise and rigorously secure. We are working on additional solutions for even smaller devices.

We have several teams that focus on open source for embedded environments. We hire outstanding Linux software engineers with a passion for open source, innovation, cutting-edge hardware and software technologies in general. You will be expected to make significant contributions through high-quality design and code, and to develop your technical leadership.

These roles include:

• Ubuntu Core and snapd software development 
• Silicon software and optimisation engineers 
• Kernel driver and hardware enablement engineers 
• Hardware-centric Linux QA Engineers 
• Hardware Certification Engineers 
• Robotics engineers 
• Industrial IoT software engineers 
• Networking software engineers (switching, routing, access and SmartNICs)

At Canonical you will have the opportunity to engage with the broader open source community. We're looking for individuals who can help build a thriving community, contribute to a broad range of technologies, and contribute to the deployment of Ubuntu and Ubuntu Core across the widest range of devices.

Location: we have remote roles open in every time zone.

What your day will look like

Based on the first round of interviews we identify specific teams where you might be an excellent fit, and conduct second round interviews with those teams. Our engineers:

• Work with the latest Linux kernel and open source technologies
• Deliver Ubuntu for the latest IoT and server-class hardware platforms
• Integrate and maintain device-oriented software stacks
• Write high-quality, well-designed software
• Collaborate proactively with other globally distributed teams 
• Display technical leadership internally and within our external communities 
• Help our customers ship their apps and SDKs on Ubuntu
• Build device OS images with Ubuntu Core, Desktop and Server
• Optimise the Ubuntu kernel and libraries for silicon-specific capabilities 
• Debug issues and produce high-quality code to fix them 
• Contribute to technical documentation to make it the best of its kind 
• Discuss ideas and collaborate on finding good solutions 
• Participate as technical lead on complex customer engagements involving complete system architectures from cloud to edge 
• Work usually from home, with global travel 2 to 4 weeks for company events 

What we are looking for in you

• An exceptional academic track record from both high school and university
• Drive and a track record of going above-and-beyond expectations
• Undergraduate degree in Computer Science or STEM, or a compelling narrative about your alternative path
• Experience with Linux (Debian or Ubuntu preferred) 
• Passion for Linux or embedded systems software (e.g. kernel, graphics, Yocto) 
• Fluency in at least one of Golang, C, C++, or Rust 
• Professional written and spoken English 
• Excellent interpersonal skills, curiosity, flexibility, and accountability 
• Passion, thoughtfulness, and self-motivation 
• Excellent communication and presentation skills 
• Result-oriented, with a personal drive to meet commitments 
• Ability to travel twice a year, for company events up to two weeks each

Additional skills that you might also bring

• Experience with Debian/Ubuntu or other distro packaging 
• Understanding of build systems and toolchains, including for cross-compilation 
• Experience with firmware, uboot, UEFI, ACPI, DSDT, or boot loaders
• Experience with power management on PCI ASPM, SATA ALPM, low power profiles 
• Computer architecture knowledge of x86, ARM, RISC-V 
• Experience in board design, bring up, and validation 
• Experience with electrical engineering design tools (e.g. schematic capture, layout) 
• Familiarity with Ubuntu development model
• Performance engineering and security experience 
• Shell or Python scripting skills 

What we offer you

We consider geographical location, experience, and performance in shaping compensation worldwide. We revisit compensation annually (and more often for graduates and associates) to ensure we recognise outstanding performance. In addition to base pay, we offer a performance-driven annual bonus. We provide all team members with additional benefits, which reflect our values and ideals. We balance our programs to meet local needs and ensure fairness globally.

• Distributed work environment with twice-yearly team sprints in person
• Personal learning and development budget of USD 2,000 per year
• Annual compensation review
• Recognition rewards
• Annual holiday leave
• Maternity and paternity leave
• Employee Assistance Programme
• Opportunity to travel to new locations to meet colleagues
• Priority Pass, and travel upgrades for long haul company events

About Canonical

Canonical is a pioneering tech firm at the forefront of the global move to open source. As the company that publishes Ubuntu, one of the most important open source projects and the platform for AI, IoT and the cloud, we are changing the world on a daily basis. We recruit on a global basis and set a very high standard for people joining the company. We expect excellence - in order to succeed, we need to be the best at what we do. Canonical has been a remote-first company since its inception in 2004.​ Working here is a step into the future, and will challenge you to think differently, work smarter, learn new skills, and raise your game.

Canonical is an equal opportunity employer

We are proud to foster a workplace free from discrimination. Diversity of experience, perspectives, and background create a better work environment and better products. Whatever your identity, we will give your application fair consideration.

#LI-remote

Software has moved to play a central role in network technology. From outstanding routing implementations like Bird and FRR to overlay networking technology such as OVN/OVS and Cilium, from kernel with SwitchDev to userspace with DPDK, from P4 to OpenFlow, the relationship between network innovation and software continues to deepen. We are building teams to bring the very best open source networking software to market in a well integrated and opinionated stack that brings the latest hyperscaler innovation to end users and enterprise customers.

We work with networking silicon providers to optimize Ubuntu and related applications for their ASICs, boards and appliances. We aim to provide a complete open source stack for data center networking, from bare metal through virtualization, container and serverless, and also to address IoT networking systematically.

You will have a good chance of success if you are an outstanding software engineer, passionate about networking, with a special interest in the interface of hardware ASICs for acceleration and software for innovation and control. We value experience in open switch initiatives such as SoNIC and DENT, and upstream experience with components such as routing, kernel networking, eBPF, DNS, firewalls and load balancers. Our selection process is rigorous and requires work from the candidate as six to eight interviews over a period of months. We look for excellent academic results and a commitment to quality, resilience, documentation, security and performance in your work.

At Canonical you will have the opportunity to engage with the broader open-source community and industry leading partners in developing future-proof networking solutions. We're looking for individuals who can help build a thriving community, contribute to a broad range of technologies, and contribute to the deployment of Ubuntu, Ubuntu Core, Private Clouds, MAAS and Kubernetes across a broad range of devices and use cases.

Location: we have network software engineering roles in APAC (Top-of-Rack switches) and Americas (SmartNIC/DPU) time zones.

What your day will look like

• Work with the most advanced operating systems and network application technologies available
• Participate upstream and deliver the Ubuntu SoNIC stack
• Collaborate with public clouds and network silicon providers
• Design and implement the best software-defined networking experience for the data center
• Write high-quality, well-designed, fast, secure and well-documented software
• Debug issues and produce high-quality fixes
• Collaborate proactively with a globally distributed organization
• Contribute to technical documentation to make it the best of its kind
• Display technical leadership internally, towards our partners, and in the open source communities
• Influence open-source projects and communities
• Work from home, with global travel twice a year for company events of up to two weeks duration

What we are looking for in you

• An exceptional academic track record
• Undergraduate degree in Computer Science or STEM, or a compelling narrative about your alternative path
• Drive and a track record of going above-and-beyond expectations
• Knowledge of networking: architecture, design, and protocols
• Understanding of Linux networking, from kernel to user space
• Fluency in C/C++ and at least one of Rust, Python or Golang
• Professional written and spoken English 
• Experience with Linux
• Excellent interpersonal skills, curiosity, flexibility, and accountability 
• Passion, thoughtfulness, and self-motivation 
• Excellent communication and presentation skills 
• Result-oriented, with a personal drive to meet commitments 
• Ability to travel twice a year, for company events up to two weeks each

Additional skills that you might also bring

• Familiarity with existing open source networking technologies: SONIC / SAI, kernel (e.g. eBPF, AF_XDP), DPDK, Switchdev, OVN, Open vSwitch.
• Familiarity with data path hardware acceleration protocols and interfaces, such as RDMA, RoCE, iWARP, NVMe, SR-IOV
• Computer architecture knowledge of x86, ARM, and RISC-V
• Experience in complex IP network engineering and implementation
• Experience with virtualization technologies, e.g., QEMU, KVM, etc.
• Previous contribution to open source projects and community involvement
• Performance engineering and security experience

What we offer you

We consider geographical location, experience, and performance in shaping compensation worldwide. We revisit compensation annually (and more often for graduates and associates) to ensure we recognise outstanding performance. In addition to base pay, we offer a performance-driven annual bonus. We provide all team members with additional benefits, which reflect our values and ideals. We balance our programs to meet local needs and ensure fairness globally.

• Distributed work environment with twice-yearly team sprints in person
• Personal learning and development budget of USD 2,000 per year
• Annual compensation review
• Recognition rewards
• Annual holiday leave
• Maternity and paternity leave
• Employee Assistance Programme
• Opportunity to travel to new locations to meet colleagues
• Priority Pass, and travel upgrades for long haul company events

About Canonical

Canonical is a pioneering tech firm at the forefront of the global move to open source. As the company that publishes Ubuntu, one of the most important open source projects and the platform for AI, IoT and the cloud, we are changing the world every day. We recruit on a global basis and set a very high standard for people joining the company. We expect excellence - in order to succeed, we need to be the best at what we do. Canonical has been a remote-first company since its inception in 2004.​ Working here is a step into the future, and will challenge you to think differently, work smarter, learn new skills, and raise your game.

Canonical is an equal opportunity employer

We are proud to foster a workplace free from discrimination. Diversity of experience, perspectives, and background create a better work environment and better products. Whatever your identity, we will give your application fair consideration.

#LI-remote

We are supporting an APAC-focused technology company building a non-custodial, protocol-level payment infrastructure that enables seamless on-chain settlement for API-based services. The project sits at the intersection of Web3 payments, cryptographic verification, and high-reliability backend systems, with a strong emphasis on security, low latency, and production-grade operations.

This is a greenfield build where senior engineers will help define architecture, security models, and operational standards from day one.

As a Senior Software Engineer, you will take ownership of core backend services that verify cryptographically signed payment requests and coordinate on-chain settlement across multiple blockchain networks. You will work closely with security, compliance, and product stakeholders, and play a key role in shaping system design, reliability practices, and developer experience.

Responsibilities

• Design and implement high-performance backend APIs for payment verification and settlement
• Build cryptographic verification logic (signature validation, replay protection, idempotency)
• Integrate with blockchain RPC providers and design confirmation, retry, and failover strategies
• Architect secure key-management solutions (KMS/HSM), audit logging, and least-privilege access
• Develop chain adapters for EVM and non-EVM networks, starting with stablecoin transfers
• Own production readiness: SLOs, monitoring, alerting, and incident response workflows
• Write technical documentation, threat models, and operational runbooks
• Mentor junior engineers and contribute to engineering standards and best practices

Qualifications

• 5–8+ years of backend engineering experience, ideally in TypeScript/Node and/or Rust
• Strong understanding of cryptographic signatures, structured payloads, and API security
• Hands-on experience with EVM transaction lifecycle (nonce, gas, finality) and/or Solana
• Proven track record building production-grade distributed systems
• Experience with CI/CD, containerised deployments, and observability tooling
• Excellent written communication skills (design docs, threat models, runbooks)

Strongly Preferred

• Experience with payment or settlement systems (idempotency, retries, reconciliation)
• Familiarity with stablecoin transfer patterns (e.g. USDC on EVM chains)
• Background in non-custodial architectures or security-sensitive systems
• Exposure to protocol-level payment flows, API monetisation, or metered billing