Senior JavaScript React Developer (Next.js)

In Cyclad we work with top international IT companies in order to boost their potential in delivering outstanding, cutting-edge technologies that shape the world of the future. For our client, we are looking for a Senior JavaScript React Developer to join our client's Website & eCommerce team. In this role, you will be responsible for building and maintaining modern, high-performance frontend solutions using React.js and Next.js. You will collaborate closely with designers, backend developers, and international stakeholders while driving best practices across the development lifecycle.   You will play a key role in the evolution of large-scale, multi-country digital platforms and contribute to the transition toward a new multisite Drupal platform planned for 2026.   Project information: • Location: Warsaw, Poland • Work Setup: Hybrid work (2 - 3 days/ week in the office) • Rate: 125 PLN/net/h + VAT (B2B contract) • Language: English (B2+ Required) • Start date: depending on candidate availability Project scope: • Develop and maintain frontend components using React.js and Next.js (SSG/SSR, i18n, performance optimization) • Build and support custom CMS modules, plugins, and integrations • Contribute to all phases of the software development lifecycle: design, development, testing, deployment, and maintenance • Drive and promote best practices, including test-driven development, CI/CD, SCRUM, refactoring, and code standards • Collaborate closely with UX/UI designers and frontend/backend developers to deliver intuitive and visually appealing user experiences • Ensure website content is easily editable by non-technical users • Optimize applications for performance, scalability, and accessibility (WCAG) • Work with distributed international teams and key stakeholders • Stay up to date with emerging frontend technologies and industry trends Requirements: • Technical Skills:• Frontend: Strong skills in React.js and Next.js (SSG/SSR, i18n, performance optimization). • Languages: JavaScript/TypeScript, HTML5, SCSS/Tailwind. • APIs: REST, GraphQL. • Tooling: Jira, Git, Figma, Confluence. • Architecture (Preferred): Headless, Decoupled, Micro Frontends, Component-based design. • Cloud & DevOps: Docker, Kubernetes, GitLab CI/CD, AWS/Azure/GCP. • Competences: • Strong front-end skills: HTML, CSS, JavaScript, jQuery, plus modern frameworks (React, Next.js). • Understanding of the entire web development process (design, development, deployment). • Good understanding of asynchronous request handling, partial page updates, and AJAX. • Proficient in cross-browser compatibility and scalable application design principles. • Experience with data migration, transformation, and scripting. • Familiarity with Agile and Scrum methodologies. • Prior experience with digital accessibility (WCAG) We offer: • Full-time job agreement based on B2B • Private medical care with dental care (covering 70% of costs) + rehabilitation package. Family package option possible • Multisport card (also for an accompanying person) • Life insurance