https://jobs.co.uk/job/senior-javascript-developer-83zero-ltd--31df1948-244e-4f79-a8e5-c2442a0f1c33 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--31df1948-244e-4f79-a8e5-c2442a0f1c33 https://jobs.co.uk/job/senior-javascript-developer-83zero-ltd--31df1948-244e-4f79-a8e5-c2442a0f1c33 Sun, 17 May 2026 23:00:00 GMT Location: Cardiff | Salary: £60000 - £80000/annum benefits, perks, healthcare options | Type: Permanent | Senior Full Stack JavaScript Developer Salary: -60,000 - -80,000 base salary plus benefits, perks, and healthcare options Location: Cardiff - Hybrid We''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 practices Build scalable web & mobile apps using JavaScript, Node.js, React/Angular/Vue Design and develop robust front-end and back-end systems Apply TDD and modern development practices Collaborate with architects, clients, and cross-functional teams Use AI tools (e.g. GitHub Copilot) to enhance delivery and quality What we''re looking for: Strong full stack JavaScript experience (Node.js + modern frameworks) Experience with Express.js, Nest.js, or Hapi.js Front-end expertise in React, Angular, Vue or similar (including Remix.js) Strong HTML5, CSS3, JavaScript (ES6+), TypeScri... Permanent