Front End Developer - React, Next.js, Javascript

About the job hackajob is collaborating with Solirius Reply to connect them with exceptional professionals for this role. Front End Engineer - React, Next.js, JavaScript (Remote, Contract - Outside IR35) The Role We are looking for an experienced Front End Engineer on an Outside IR35 contract basis to deliver user-centric digital services for our public sector clients. This is a fully remote role focused on building accessible, performant web applications aligned with GDS standards. You will work within multidisciplinary agile teams to produce production-quality front-end solutions that make a real difference to public services. Key Responsibilities Develop and maintain front-end applications using React and Next.js Build accessible, responsive interfaces compliant with WCAG 2.2 AA and GDS Design System Collaborate with designers, product owners, and back-end engineers in Agile delivery teams Write clean, testable JavaScript/TypeScript with comprehensive unit and integration tests Implement server-side rendering (SSR) and static site generation (SSG) using Next.js Contribute to technical decision-making and code reviews Ensure services meet GDS Service Standard and pass assessments Optimise application performance and Core Web Vitals Essential Skills & Experience Strong proficiency in React (hooks, context, state management) Production experience with Next.js (App Router, SSR, SSG, API routes) Advanced JavaScript (ES6+) and ideally TypeScript Public sector / government digital delivery experience (e.g., GDS, NHS Digital, HMRC, DWP, MOJ, Home Office) Understanding of GOV.UK Design System and accessible front-end development (WCAG 2.2 AA) Experience working in Agile/Scrum teams within government delivery frameworks Testing: Jest, React Testing Library, Cypress or Playwright Version control with Git (GitHub/GitLab) RESTful API integration and understanding of microservices architecture Desirable Skills TypeScript (advanced) GOV.UK Prototype Kit GDS Frontend (govuk-frontend) Design systems and component library development CI/CD pipelines (GitHub Actions, Jenkins, Azure DevOps) Cloud platforms (AWS, Azure) Performance optimisation and monitoring Accessibility auditing tools (axe, WAVE, PA11Y)