
Proton · Taipei; Geneva
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 dem...
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!
With Meet, your calls remain private. No third parties—advertisers, hackers, spying governments, or even us—can access your calls.
As a Frontend Engineer in the Meet team, you will play a key role in building intuitive, performant, and secure user experiences
for our communication platform.
You will be responsible for developing and maintaining user-facing features, ensuring seamless interactions, responsiveness, and
high-quality UI across devices. Working closely with backend, design, and other teams, you will help deliver features that are
both reliable and user-centric.
You will advocate for clean, maintainable code and strong frontend architecture, while balancing performance, accessibility, and
rapid feature delivery to provide the best experience for our users.
We believe in small empowered teams that focus on delivering large impact. This requires strong engineers with product engineering
mindset who can collaborate well, take ownership, and do whatever is needed to achieve our ambitious goals. Join a global team to
shape Proton Meet, which was launched in 2026 to provide free encrypted video calls for all.
Even if you don’t meet all the requirements listed above, but feel you could still be a great fit, please still apply.
investors with conflicting agendas, not governments. The work you do here is real, and the impact is measurable. (read more
about our impact here)
accelerate your career because you'll be thrown into real challenges, with real ownership, from day one.
leave, and wellness support so you can bring your best self to work every day
we're building. When Proton wins, you win.
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
for you.
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.
BUILD SOMETHING MONUMENTAL FOR HEALTHCARE! At Tandem Health we’re reimagining healthcare by putting clinicians first. Our platform - designed by clinicians, for clinicians - is built on deep insight into real-world pain points, with intuitive medical notes and workflows that truly support patient care. We’re a fast-scaling health-tech company backed by top investors and expanding globally. We move fast, stay curious, and believe building something that matters starts with an extraordinary team. If you're passionate about impact and innovation, we'd love to meet you! ABOUT THE ROLE You're the kind of engineer who gets curious when things don't behave as expected. When audio drops, latency spikes, devices behave inconsistently, or streams become unreliable, you want to understand why. You've spent time building systems where audio and real-time media matter. Maybe you've worked on streaming platforms, communication products, podcasting infrastructure, video conferencing, live broadcasting, or other media-heavy applications. You've seen the challenges that come with real-time systems and know that delivering a seamless experience requires careful engineering across the entire stack. At Tandem Health, you'll help build and scale the audio infrastructure powering millions of healthcare conversations. From device capture and streaming to transcription and AI-powered documentation, you'll work on systems that need to be reliable, low-latency, and production-ready at scale. This is a highly impactful role where you'll work closely with product, AI, and platform teams to ensure that every conversation reaches our systems with the quality and reliability needed to support clinicians across Europe. WHAT YOU WILL DO * Build and improve the systems that power real-time audio streaming throughout our platform. * Work across the full media pipeline, including device capture, buffering, transport, streaming, transcription, monitoring, and quality assurance. * Design and operate reliable, scalable infrastructure capable of handling large volumes of real-time audio data. * Investigate and solve challenging production issues related to latency, connectivity, audio quality, and device compatibility. * Collaborate with engineers across frontend, backend, infrastructure, and AI teams to build seamless end-to-end experiences. * Improve observability, testing, and tooling to ensure our media systems remain stable as we continue to scale. * Help shape technical direction and engineering best practices for real-time media systems at Tandem. WHAT YOU BRING * Experience building and operating production systems involving audio, video, streaming, or other real-time data. * Strong software engineering fundamentals and experience building reliable backend systems. * Familiarity with technologies and protocols commonly used in real-time media systems such as WebRTC, RTP, RTCP, WebSockets, streaming infrastructure, or similar technologies. * Experience troubleshooting performance, latency, reliability, and scalability issues in production environments. * A systems-oriented mindset and a strong desire to understand how things work beneath the surface. * Ability to work across multiple layers of the stack and collaborate effectively with engineers from different disciplines. * Strong communication skills and a pragmatic approach to solving complex technical problems. BONUS POINTS: * Experience working with large-scale audio processing pipelines. * Experience with speech-to-text, transcription, or conversational AI systems. * Experience building products where audio or video is a core part of the user experience. * Experience with frontend development in React and TypeScript. * Experience with C# and Windows-based development. * Experience working in healthcare, regulated environments, or other reliability-critical domains. LOCATION We believe the best ideas happen when we’re together. This role is based in our vibrant HQ in the Epicenter building in the heart of Stockholm where you will work primarily from our office to collaborate, connect, and build our culture. HOW TO APPLY We adopt a continuous selection process, so please make sure to apply with your CV in English. Our interview process consists of 4 stages: 1. Screening interview with Talent Acquisition 2. Technical interviews with some of our Engineering team 3. System Design Interview at our office - Join us in the Stockholm office for a lunch and a Product focused System Design interview to experience our culture firsthand, collaborate with our team, and see how you work in action. 4. Follow-up interview with our CTO & Co-Founder We're currently in the middle of vacation season, which means it may take us a little longer to review applications and get back to you. Thanks for your patience - we're looking forward to reading your application! BENEFITS * Competitive salary & company stock options * 30 days/year of paid vacation * 5,000 SEK wellness allowance (friskvårdsbidrag) plus an additional 6,000 SEK yearly to spend on other health related initiatives * Generous Parental leave top-up for new parents * Private Medical Insurance to stay healthy * Mental health support through our partner Mindler * Pension program * Social and team-building activities (off-sites, after works, winter/summer parties) * An opportunity to make a real positive impact in the world of healthcare * Work with some of the best minds in AI, healthcare, and engineering. We review our benefits packages on a regular basis and might modify our benefits from time to time. CULTURE AT TANDEM At Tandem, we move fast, think big, and take ownership. We're a high-performing, diverse team with a shared drive to change the future of healthcare - and we’re just getting started. Our culture is built on action, ambition, and learning. You'll be trusted to take the lead, challenge yourself, and make an impact from day one. We believe real growth happens when you're stretched, supported, and surrounded by smart, passionate teammates who want to win together. Even though we’re spread across countries, we come together often in Sweden for team meetings, social events, and offsites - blending global reach with real human connection. We hire for talent, potential, and attitude - valuing different backgrounds and fresh perspectives. Great ideas come from everywhere, and we’re building a team that reflects the world we want to change. Tandem handles sensitive patient data and will conduct a background check before hiring any candidate.
ABOUT ELEVENLABS ElevenLabs is an AI research and product company transforming how we interact with technology. We launched in January 2023 with the first human-like AI voice model. Today, we serve millions of users and thousands of businesses - from fast-growing startups to large enterprises like Deutsche Telekom and Meta. Our investors are some of the world's most prominent, including Andreessen Horowitz, ICONIQ Growth and Sequoia. We've raised $781M in funding and our last valuation was $11B - multiples of 11, always. We have expanded from voice into three main platforms: * ElevenAgents enables businesses to deliver seamless and intelligent customer experiences, with the integrations, testing, monitoring, and reliability necessary to deploy voice and chat agents at scale. * ElevenCreative empowers creators and marketers to generate and edit speech, music, image, and video across 70+ languages. * ElevenAPI gives developers access to our leading AI audio foundational models. Everything we do is the result of the creativity and commitment of our team - builders doing the best work of their lives. We are researchers, engineers, and operators. IOI medalists and ex-founders. If you want to work hard and create lasting positive impact, we want to hear from you. HOW WE WORK * High-velocity: Rapid experimentation, lean autonomous teams, and minimal bureaucracy. * Impact not job titles: We don’t have job titles. Instead, it’s about the impact you have. No task is above or beneath you. * AI first: We use AI to move faster with higher-quality results. We do this across the whole company—from engineering to growth to operations. * Excellence everywhere: Everything we do should match the quality of our AI models. * Global team: We prioritize your talent, not your location. WHAT WE OFFER * Innovative culture: You’ll be part of a generational opportunity to define the trajectory of AI, surrounded by a team pushing the boundaries of what’s possible. * Growth paths: Joining ElevenLabs means joining a dynamic team with countless opportunities to drive impact - beyond your immediate role and responsibilities. * Learning & development: ElevenLabs proactively supports professional development through an annual discretionary stipend. * Social travel: We also provide an annual discretionary stipend to meet up with colleagues each year, however you choose. * Annual company offsite: Each year, we bring the entire team together in a new location - past offsites have included Croatia and Italy. * Co-working: If you’re not located near one of our main hubs, we offer a monthly co-working stipend. ABOUT THE ROLE We're looking for an experienced AI Safety Engineer to drive the deployment and operationalization of automated moderation and guardrail systems that protect our platform and users across a multimodal space. You'll work alongside a team of ML and full stack engineers to build production-grade safety infrastructure from the ground up. This is a product ownership role where you'll be responsible for end-to-end technical execution of our safety systems, from architecture to deployment andto monitoring. You'll bridge the gap between ML research and production-grade systems, ensuring our safety infrastructure is robust, observable, and scalable. What you'll do: * Design and build scalable backend infrastructure for content moderation, abuse detection and agents guardrails, deploying AI/ML models into production systems * Architect robust APIs, data pipelines, and service architectures supporting real-time and batch moderation workflows * Implement comprehensive monitoring, alerting, and observability systems; establish SLIs, SLOs, and performance benchmarks * Partner with ML engineers to translate research models into production-ready systems and integrate them across our product suite * Drive technical decisions and contribute vision to the safety roadmap on how the next generation of platform guardrails should be built for scale and precision. REQUIREMENTS * 6+ years of backend software engineering experience building production systems at scale * Strong production backend experience: distributed systems, APIs, data pipelines, and Python expertise (asynchronous Python, backend frameworks) * Infrastructure & DevOps proficiency: cloud platforms (AWS/GCP), containerization (Docker/K8s), CI/CD pipelines * Observability mindset with experience in monitoring tools (Prometheus, Grafana) and building observable systems * Track record of taking products or systems from 0→1 with measurable impact, including deploying or working alongside ML/AI systems in production Bonus: * Trust & Safety, Content Moderation, or Integrity engineering experience * MLOps experience: deployment, monitoring, and versioning of ML models * Experience with SQL, data analysis tools, real-time streaming systems (Kafka, Redis), or event-driven architectures * Familiarity with React or modern frontend frameworks LOCATION This role is remote and can be executed globally. If you prefer, you can work from our offices in London, New York, San Francisco, and Warsaw. #LI-remote
Principal Java Engineer - Backend Platform Salary: £76,340 - £100,340 Per Annum Contract: Full-Time, Permanent Location: Hybrid - minimum 2 days per week in office, Basingstoke/London/Bristol ABOUT THE ROLE The Principal Software Engineer (Full-Stack, Backend-leaning) is a senior engineer responsible for the backend architecture, data pipelines, and API layer of a new sports technology product, while remaining capable of contributing to frontend development as needed. This role sits within a small, fast-moving product engineering team and requires someone comfortable owning end-to-end technical delivery across the stack, with backend and data work as the primary focus. WHAT YOU’LL BUILD You will be a core contributor to a new backend platform being built from scratch. The work spans the full data journey - from ingestion at the edge through to storage, transformation, and delivery to end users. Key areas of focus include: * Low-latency data pipelines that ingest and process live sports tracking data, with strict latency requirements for time-critical outputs delivered to coaches and analysts in near real-time. * Event-driven processing using Kafka for streaming data and control messages between on-site devices and cloud services, handling both fast-path live outputs and asynchronous post-processing workflows via SQS and AWS Batch. * Cloud infrastructure on AWS, including Greengrass for edge-to-cloud orchestration, S3 for video and data storage, and Lambda for lightweight processing tasks. * Data transformation and aggregation layers that normalise tracking outputs, store them in a data lake, and make them available to downstream consumers via clean API contracts. * REST and WebSocket APIs that serve both a live data product for immediate consumption and an insights portal for historical analysis and performance comparison. * Observability and reliability - instrumentation, logging, and tracing are built in from the start, not bolted on. The platform needs to run 24/7 without on-site support. KEY RESPONSIBILITIES * Design and build backend services and APIs (REST/WebSocket) supporting data ingestion, transformation, and delivery to frontend and downstream consumers, with particular attention to latency and throughput given real-time processing requirements. * Own data storage and pipeline architecture, including integration with streaming/event infrastructure. * Implement authentication and authorisation in line with the team's chosen cloud identity and access management approach. * Provide technical direction and review for frontend development (React/TypeScript), working closely with frontend engineers to align on approach, component contracts, and data shapes - this is a collaboration and oversight function rather than day-to-day frontend delivery. * Collaborate closely with computer vision/data science engineers to define and consume data contracts. * Participate in technical decision-making for a product in active development, including architecture choices with long-term implications for scale, latency, and maintainability. * Contribute to technical leadership of the wider engineering team, given the seniority of this role. SKILLS AND EXPERIENCE * Strong backend engineering background with production experience in Java (required). * Demonstrated experience building low-latency, high-throughput systems - this is a core requirement, not a nice-to-have. * Working knowledge of a modern frontend framework such as React/TypeScript, sufficient to review and direct frontend work rather than deliver it independently. * Experience with cloud infrastructure and event-driven architectures (e.g. Kafka or equivalent streaming technology). * Experience designing and evolving API contracts (OpenAPI or similar) in a fast-moving, still-evolving product environment. * Familiarity with modern cloud identity and access management approaches (e.g. AWS Cognito or equivalent) is a plus. * Strong communication skills - able to work directly with product and cross-functional stakeholders, and to mentor or direct engineers outside their own core discipline. * Comfortable with ambiguity: this is a build-phase product with evolving scope and infrastructure decisions still being finalised. BENEFITS AND PERKS * 25 days annual leave (excluding bank holidays) * Enhanced pension scheme with 5% matching * Hybrid working model * Complimentary Unmind wellbeing app * Onsite gym (Basingstoke) * Access to sporting events and tickets * Sony Group Company discounts EQUAL OPPORTUNITY EMPLOYER Hawk-Eye is committed to fostering an inclusive and diverse workplace. We ensure all employees are treated fairly, regardless of gender, marital status, race, nationality, religion, age, disability, or union membership. We value diversity and strive to create an environment where everyone can reach their full potential. APPLY TODAY If you are passionate about building high-performance backend systems and want to work on real-time data products at scale, we would love to hear from you.