https://jobs.co.uk/job/senior-javascript-developer-83zero-ltd--266a9c05-9bb4-4bbe-8c26-1a8179764bbf RSS feed for Senior JavaScript Developer at 83zero Ltd. en-gb Tue, 26 May 2026 05:28:07 GMT https://jobs.co.uk/job/senior-javascript-developer-83zero-ltd--266a9c05-9bb4-4bbe-8c26-1a8179764bbf https://jobs.co.uk/job/senior-javascript-developer-83zero-ltd--266a9c05-9bb4-4bbe-8c26-1a8179764bbf Tue, 19 May 2026 11:52:56 GMT Location: City | Salary: 60000.00-60000.00 Annual | Type: Permanent | Senior Full Stack JavaScript Developer Salary: 60,000 - 80,000 base salary plus benefits, perks, and healthcare optionsLocation: Cardiff - HybridWe''re looking for a Senior Full Stack JavaScript Developer to join a fast-moving engineering team building modern web and mobile applications that deliver real impact.You''ll lead technical delivery, mentor engineers, and help shape scalable, secure solutions across projects involving cutting-edge technologies including AI, cybersecurity, and autonomous systems.What you''ll do:Lead and mentor developers, driving engineering best practicesBuild scalable web and mobile apps using JavaScript, Node.js, React/Angular/VueDesign and develop robust front-end and back-end systemsApply TDD and modern development practicesCollaborate with architects, clients, and cross-functional teamsUse AI tools (e.g. GitHub Copilot) to enhance delivery and qualityWhat we''re looking for:Strong full stack JavaScript experience (Node.js + modern frameworks)Experience with Express.js, Nest.js, or Hapi.jsFront-end expertise in React, Angular, Vue or similar (including Remix.js)Strong HTML5, CSS3, JavaScript (ES6+), TypeScript skillsExperience in a senior/lead role wi... Permanent