Senior Frontend Enigneer

Position: Senior Frontend Engineer Type of contract: COE (UoP) up to 22 700 PLN gross/month Working model: fully remote You can join our client and work on a modern digital platform designed to better connect shoppers and retailers within the global e-commerce ecosystem. The project focuses on building and enhancing scalable web applications and core services that power user interactions. You’ll collaborate closely with product and design teams to deliver intuitive, high-performance user experiences. The environment emphasizes innovation, usability, and continuous improvement of frontend architecture. Role summary: As a Senior Engineer, you will take ownership of designing and developing responsive, high-quality user interfaces while collaborating with cross-functional teams. The role involves translating UI/UX designs into functional applications, improving performance, and ensuring consistency through reusable components. You’ll also contribute to code quality through reviews and support architectural decisions. The position requires strong expertise in modern frontend technologies, especially React and TypeScript, along with experience in scalable application development. Responsibilities: Design and develop modern, responsive user interfaces Collaborate with designers, backend engineers, and DevOps teams Review code and maintain high engineering standards Build reusable UI components and optimize performance Ensure cross-browser compatibility and accessibility Key requirements: Degree in Computer Science (or equivalent experience) 4+ years of experience in software engineering Hands-on experience in writing production code for web applications; Practical knowledge in front-end technologies such as JavaScript, TypeScript, CSS, HTML, with strong proficiency in TypeScript (generics, type-safe APIs, strict mode); Expertise in the React ecosystem including React 19, React Router, modern bundlers (Rsbuild/Webpack/Vite), and micro-frontend architectures (Module Federation); Experience with state management and data-fetching libraries such as Zustand, TanStack React Query, and reactive patterns with RxJS; Familiarity with modern component libraries and styling toolchains- HeroUI, Tailwind CSS, design-token-driven theming; Experience with unit and E2E testing frameworks such as Jest, Testing Library, and Playwright; Experience working with internal packages and publishing them to a private registry and Semantic Versioning; Familiarity with CI/CD pipelines and release workflows- Azure DevOps, GitHub Actions, or Jenkins- including PR validation, artifact promotion, and multi-environment deploys; An understanding of cloud computing principles and practices; experience with production applications in cloud environments. Azure and Kubernetes experience is preferred; Knowledge in key programming concepts like memory management, optimization techniques, API design, relational mapping frameworks, and distributed applications; An understanding of database concepts and experience writing SQL in a relational database such as MySQL or PostgreSQL; Familiarity with monitoring and logging solutions; Self-starter who can move projects forward by filling in the gaps on Agile teams, from delivering complete, well-defined functionalities with high quality standards, through reviewing other Engineers’ code to contributing to design sessions. Offer: COE, up to 22 700 PLN gross per month Private healthcare, life insurance, sports card, and lunch subsidy Learning and development support (including tuition assistance) Employee Assistance Program Remote or hybrid work model supporting work–life balance Opportunity to collaborate with experienced engineers on global-scale e-commerce solutions