Salary: £60,000 - 80,000 per year Requirements: We are looking for strong full stack JavaScript experience, including Node.js and modern front-end frameworks. We need experience with Express.js, Nest.js, or Hapi.js. We require front-end expertise in React, Angular, Vue, or similar frameworks, including Remix.js. We need strong skills in HTML5, CSS3, JavaScript (ES6), and TypeScript. We are looking for experience in a senior or lead role with mentoring responsibilities. We value a passion for building scalable, high-quality software. Responsibilities: We lead and mentor developers while driving engineering best practices. We build scalable web and mobile applications using JavaScript, Node.js, React, Angular, or Vue. We design and develop robust front-end and back-end systems. We apply TDD and modern development practices. We collaborate with architects, clients, and cross-functional teams. We use AI tools such as GitHub Copilot to improve delivery and quality. Technologies: AI Angular Copilot ES6 GitHub HTML5 JavaScript Mobile React TDD TypeScript Vue Web NodeJS ExpressJS Java More: We are a fast-moving engineering team building modern web and mobile applications that deliver real impact. Our work spans cutting-edge technologies including AI, cybersecurity, and autonomous systems, and we offer a Senior Full Stack JavaScript Developer role based in Cardiff with a hybrid working setup. We provide a competitive salary of £60,000 to £80,000 plus benefits, perks, and healthcare options. We prioritise innovation, collaboration, and wellbeing, and we are looking for someone ready to take the lead on exciting engineering challenges. last updated 21 week of 2026