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Frontend Engineer - Headless CMS (WordPress, React, Next.js) (f/m/x) Miejsce pracy: Warszawa Technologies we use Expected React.js Next WordPress CSS3 HTML GraphQL jQuery About the project We are looking for a Senior Engineer to build and evolve our headless eCommerce platforms based on WordPress, React and Next.js. With a planned migration to Drupal, this role offers the opportunity to work on modern frontend solutions and a major CMS transformation. Sii ensures that all employment-related decisions are made solely on the basis of qualifications and competencies. We are committed to equal treatment of all individuals, regardless of any protected characteristics, and promoting a diverse and inclusive work environment. Your responsibilities Developing and maintaining eCommerce features Ensuring high performance, responsiveness, and accessibility across all devices Collaborating closely with UX/UI designers to deliver intuitive and visually appealing interfaces Optimizing applications for maximum speed and scalability Participating in all phases of the development lifecycle from design to deployment Coordinating with other team members and stakeholders Improving platform architecture through continuous refactoring and technical enhancements Our requirements Minimum 5 years of experience in building headless websites using WordPress, including custom plugins, REST/GraphQL APIs, and multilingual setups Strong frontend development skills with HTML, CSS, JavaScript, React, Next.js, Tailwind CSS and modern UI frameworks Experience building reusable component libraries and working with Storybook and Figma Knowledge of Drupal is a strong advantage Solid understanding of API-driven architectures and CMS integrations Familiarity with Agile/Scrum development processes Experience with digital accessibility standards (WCAG) Experience using GenAI tools to support and accelerate the development process Willingness to commute to the office in Warsaw 2-3 days a week Fluent Polish required Residing in Poland required What we offer Great Place to Work since 2015 - it’s thanks to feedback from our workers that we get this special title and constantly implement new ideas Employment stability - revenue of PLN 2.1BN, no debts, since 2006 on the market We share the profit with Workers - over PLN 76M has already been allocated for this aim since 2022 Attractive benefits package - private healthcare, benefits cafeteria platform, car discounts and more Comfortable workplace – class A offices or remote work Dozens of fascinating projects for prestigious brands from all over the world – you can change them thanks to Job Changer application PLN 1 000 000 per year for your ideas - with this amount, we support the passions and voluntary actions of our workers Investment in your growth – meetups, webinars, training platform and technology blog – you choose Fantastic atmosphere created by all Sii Power People Recruitment stages Send your CV Talk to us about your expectations Learn more about our projects and choose the best Start your adventure with Sii! Sii Sp. z o.o. Sii is the leading technology consulting, digital transformation, engineering, and business services vendor in Poland. We already employ more than 7 300 professionals and implement projects in a variety of industries for clients from many countries around the world. The Great Place to Work title, won 10 times in a row, proves that at Sii, we create a friendly work environment. Sii ensures that all employment-related decisions are made solely on the basis of qualifications and competencies. We are committed to equal treatment of all individuals, regardless of any protected characteristics, and promoting a diverse and inclusive work environment.