Do you want to make a change in the FitTech industry with an agile, fast-moving team? How about being part of the culture that truly values your opinions and ideas? If you want to develop software that really matters and deliver the best solutions for our clients alongside a like-minded team, then you're in the right place. Be part of the digital transformation of the fitness industry!PerfectGym has joined forces with Sport Alliance, marking a significant milestone in our mission to digitize the fitness industry globally!The start date for this position is in FebruaryYour position in our team Join an engineering team that values mutual respect, collaboration, and a fun, supportive work environment. Build smart frontend solutions that deliver the best possible user experience. Work with modern technologies (e.g., React, TypeScript, MobX, Jest, MUI) as part of a cross-functional product team. Design and develop highly available, scalable software components in an agile setup. Think outside the box and always keep the big picture in mind! Your profile At least 3 years of professional experience in developing and operating high-availability applications. Excellent understanding of JavaScript/TypeScript, including core language concepts, and solid knowledge of web technologies (HTTP, REST, CSS). Strong understanding of the difference between simple jQuery-based HTML pages and large-scale, production-grade JavaScript applications. Experience designing and developing web applications, as well as writing automated tests (unit tests, E2E tests, etc.). Interest in emerging programming trends, strong teamwork skills in an international and multicultural environment, and confident communication in English. Nice to have: hands-on experience with React routing, including React Router (react-router-dom), nested routes, dynamic routes, route protection, redirection, and performance optimization. Your benefits with us Benefits package – private medical care and a sports card to support your health and well-being Flexible working hours – manage your schedule and enjoy a real work-life balance Flexible work model – work fully remotely or combine it with on-site collaboration at our modern office in Warsaw Flexible employment options – choose the type of contract that best suits your needs Access to Udemy Business – grow your skills with thousands of high-quality online courses Unique experience in the Fitness and SaaS industry – join a market-leading company in a dynamic, fast-growing field International team – collaborate with talented colleagues from around the world in a diverse and inclusive environment Unforgettable company events – take part in engaging team-building activities and memorable celebrations No dress code – express your personal style and feel comfortable at work