Frontend Developer – £650/day – 6 months – Inside IR35 – 3 days onsite (London) React or Svelte – Commodities Trading – AWS – TypeScript You'll be working for a leading energy trading business, building out a modern post-trade platform that's genuinely pushing boundaries – live PnL, intraday position reporting, and digitised front office workflows. This is a business that backs its tech, delivers fast, and builds for the long-term. The must-haves: Strong React or Svelte experience (this needs to be hands-on and recent) TypeScript Built modern UIs as part of a product team Comfortable working in fast-moving agile squads Experience in commodities or trading (preferred but not essential) Experience in Python or AWS Services - if you have both this will make you a front runner for this position. Nice to haves (in order of priority – at least one or two is needed): Python (commercial experience) AWS services – S3, ECS, AppSync GraphQL or REST APIs Kafka or message queue systems PostgreSQL or NoSQL database experience To apply – click the link or for a faster response, email Barry.Ansell@HarringtonStarr.com