Role Summary
We are seeking a passionate and skilled Frontend Engineer to join our growing Lumo AI team. You’ll work across all functions of Lumo, turning designs into responsive, fast and reliable interfaces. Your code will shape the day‑to‑day experience of users, making it smoother, clearer, and more enjoyable. Full Stack Engineering Create, evolve and sustain high‑performance features that tie together the front‑end and back‑end layers of our modern stack. Ensure every component scales smoothly and integrates cleanly. What You Will Do
Turn UI mockups into production‑ready React components. Integrate those components with our backend services using TypeScript and modern data‑fetching patterns. Optimize performance so pages load instantly even on slower connections. Collaborate closely with product managers, designers and other engineers to ship features end to end. Own the quality of your work: write tests, document decisions and participate in code reviews. Spot friction in the user journey and fix it before it becomes a complaint. What we expect
Strong expertise in React. Solid grasp of TypeScript and JavaScript fundamentals. Experience with state‑management and data‑fetching libraries. Ability to produce clean, maintainable code without cutting corners. Good communication skills and a willingness to give and receive honest feedback. A proactive attitude – you identify problems and solve them, not wait for direction. Nice to have
Exposure to AI or large language model products. Python scripting for tooling or data tasks. Knowledge of distributed systems and observability stacks. Hands‑on experience with design tools such as Figma. Why Join Lumo
You’ll be joining a mission‑driven team at Proton, trusted by over 100 million people worldwide and owned by the nonprofit Proton Foundation. This role offers the opportunity to shape the future of AI by building full‑stack infrastructure that proves privacy, performance, and reliability aren’t mutually exclusive. As a Frontend Engineer at Lumo, you’ll own the complete technical stack powering privacy‑first AI experiences, ensuring millions of users can rely on Lumo for their most sensitive conversations with complete confidence in both AI capabilities and privacy protection. 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. 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. 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.
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We are seeking a passionate and skilled Frontend Engineer to join our growing Lumo AI team. You’ll work across all functions of Lumo, turning designs into responsive, fast and reliable interfaces. Your code will shape the day‑to‑day experience of users, making it smoother, clearer, and more enjoyable. Full Stack Engineering Create, evolve and sustain high‑performance features that tie together the front‑end and back‑end layers of our modern stack. Ensure every component scales smoothly and integrates cleanly. What You Will Do
Turn UI mockups into production‑ready React components. Integrate those components with our backend services using TypeScript and modern data‑fetching patterns. Optimize performance so pages load instantly even on slower connections. Collaborate closely with product managers, designers and other engineers to ship features end to end. Own the quality of your work: write tests, document decisions and participate in code reviews. Spot friction in the user journey and fix it before it becomes a complaint. What we expect
Strong expertise in React. Solid grasp of TypeScript and JavaScript fundamentals. Experience with state‑management and data‑fetching libraries. Ability to produce clean, maintainable code without cutting corners. Good communication skills and a willingness to give and receive honest feedback. A proactive attitude – you identify problems and solve them, not wait for direction. Nice to have
Exposure to AI or large language model products. Python scripting for tooling or data tasks. Knowledge of distributed systems and observability stacks. Hands‑on experience with design tools such as Figma. Why Join Lumo
You’ll be joining a mission‑driven team at Proton, trusted by over 100 million people worldwide and owned by the nonprofit Proton Foundation. This role offers the opportunity to shape the future of AI by building full‑stack infrastructure that proves privacy, performance, and reliability aren’t mutually exclusive. As a Frontend Engineer at Lumo, you’ll own the complete technical stack powering privacy‑first AI experiences, ensuring millions of users can rely on Lumo for their most sensitive conversations with complete confidence in both AI capabilities and privacy protection. 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. 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. 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.
#J-18808-Ljbffr
Frontend Engineer (Lumo AI) Arbeitgeber: proton tehnologies
Lumo AI ist ein hervorragender Arbeitgeber, der Ihnen die Möglichkeit bietet, an bedeutungsvollen Projekten zu arbeiten, die das Vertrauen von über 100 Millionen Nutzern weltweit genießen. Unsere Unternehmenskultur fördert Zusammenarbeit und Innovation, während wir Ihnen die nötigen Ressourcen und Technologien zur Verfügung stellen, um Ihre Fähigkeiten weiterzuentwickeln. Bei Lumo haben Sie die Chance, in einem dynamischen Umfeld zu wachsen und aktiv zur Gestaltung der Zukunft der KI beizutragen, während Sie gleichzeitig die Privatsphäre unserer Nutzer schützen.
