About the teamYou’ll be joining the engineering team of a stealth-mode cybersecurity startup. Due to NDA restrictions, more details will be shared during the interview process.‍Аbout the roleAs a Senior Frontend Engineer, you will craft high-quality user interfaces with React and TypeScript, turning complex AI capabilities into seamless, intuitive experiences.You’ll collaborate closely with product, UX, and ML teams to deliver polished, high-impact features from concept to launch.You’ll take ownership of frontend architecture, ensure code quality, and play a key role in shaping both the product and engineering culture.‍Responsibilities: Lead the development of scalable, performant frontend features using React (TypeScript) Collaborate with cross-functional teams to build AI-powered, user-focused experiences Write clean, maintainable, and well-tested code with a focus on long-term scalability Drive technical discussions, mentor peers, and contribute to architectural strategy Rapidly prototype, measure success, and iterate based on user feedback ‍Requirements 7+ years of professional experience in frontend development — a must Deep expertise in React and TypeScript — a must Strong understanding of modern frontend architecture, performance, and accessibility Experience integrating REST APIs and working closely with backend systems Familiarity with cloud platforms (AWS/GCP) and CI/CD workflows A strong product mindset and curiosity about AI and intelligent interfaces Nice to have Experience working at early-stage startups Experience with Go Experience building or maintaining design systems Contributions to open-source projects Experience working with AI tools or developer platforms Benefits Work in a highly professional team. Informal and friendly atmosphere in the team Paid vacation — 20 business days per year, 100% sick leave payment Equipment provision Partially compensated educational costs (for courses, certifications, professional events, etc.) Legal and Accounting support in Poland Ability to work from our comfortable downtown office in Warsaw 5 sick days per year Medical insurance (after the end of the probationary period) English and Polish classes 2 times a week (online) Bright and memorable corporate life: corporate parties, gifts to employees on significant dates ‍