Senior Frontend Developer

Hello! We are looking for a Senior Frontend Developer to join our tech team and play a key role in enhancing our product and elevating the user experience. Work format: Possibility to work fully remotely or from our offices in Warsaw or Kyiv About us: We are a mobile and web application (www.ohayu.com) that enables easy and fast purchases of mobile data packages in any country in the world, leveraging eSIM technology; Our product allows seamless use of internet services while traveling at rates much lower than roaming and without having to search for local operators or purchase physical SIM cards. Your tasks: Take ownership of the overall frontend architecture and scalability; Collaborate closely with the design team to translate Figma designs into high-quality, responsive user interfaces; Optimize website performance, speed, and accessibility across devices and browsers; Implement fast, iterative changes to support A/B testing and continuous UX improvement; Mentor and support other frontend developers, conducting code reviews and sharing knowledge. About you: 7+ years of JavaScript experience; 5+ years of React experience; 4+ years of Next.js experience; 3+ years of Typescript experience Strong proficiency with the Vite ecosystem and modern build tools; Great knowledge of Crash Analysis Tools and Production Management; Independence at work, full ownership of tasks, mentoring and brainstorming skills; At least intermediate English level (all work communication in English). Nice to have: Familiarity with styled-components or other CSS-in-JS libraries. Why to join us: Building product-driven application with a strong emphasis on UX/UI; Startup environment, where your ideas are valued, and you have the freedom to innovate and take full ownership; Be part of a groundbreaking venture in the rapidly evolving field of eSIM technology, shaping the future of connectivity and mobile devices. Join us in reshaping the future of connectivity. Apply To This Job