We are redirecting you to the source. If you are not redirected in 3 seconds, please click here.

(791) Senior React Developer at Altoros. Altoros, . an established provider of software development services, is looking for a. Senior React Developer.. Requirements:. . 5+ years of professional experience in front-end development. . Profound knowledge of JavaScript (ES6+). . Strong experience with React.js. . Familiarity with other UI frameworks (Vue.js, Angular etc. — optional)and React-based frameworks such as . Next.js. (big plus). . Experience with state management tools (Redux, Zustand, Recoil, etc.). . Experience with modern build tools (Webpack, Vite). . Solid understanding of HTML5, CSS3, W3C standards. . Experience with CSS-in-JS libraries and/or preprocessors (SASS, LESS, Styled Components). . Experience designing scalable front-end application architectures. . Proficiency in using AI tools to enhance development workflow and reduce manual effort. . Experience writing unit and end-to-end tests. . Understanding of common design patterns and component-based architecture. . Excellent communication skills and ability to work in customer-facing environments. . English: B2+ / Upper-Intermediate+, comfortable with technical discussions and client interviews. . A big plus: experience in cross-platform mobile development (e.g., React Native). . Responsibilities:. . Develop new user-facing features using React.js. . Build reusable components and front-end libraries for future use. . Write and maintain unit tests (Jest / Testing Library or similar). . Leverage AI-powered tools (e.g., GitHub Copilot, ChatGPT) to boost productivity and automate repetitive development tasks such as test writing, code refactoring, or documentation. . Collaborate closely with UX/UI team to deliver the best possible customer experience, balancing business goals and technical constraints. . Produce internal documentation to support maintainability and onboarding. . Participate in sales/estimation process as a technical specialist. . Attend meetings with potential and current customers, as needed. . Join Altoros Team!. Company Location: Poland.