💼 Full-Time Position

Senior Javascript Developer

🏢
83zero Limited
📍 cardiff, wales, United-Kingdom
📍
Location
cardiff, United-Kingdom
📅
Posted
June 08, 2026
⏰
Type
Full-Time
🎯

Full-Time Opportunity: This is a permanent, full-time position with a competitive package and real career growth potential.

Job Description

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 en...