Contract Full-Stack JavaScript Developer - AI Platform

Reference: MC-753
🚀 Contract Full-Stack JavaScript Developer (AI Platform)
📍 Location: 3 days per week in London Office
📆 Duration: 4 weeks with a longer term extension afterwards.
💼 IR35 Status: Outside IR35
💰 Rate: £500p/d – £600p/d

Opus is partnering with a cutting-edge FinTech start-up to secure a Contract Full-Stack JavaScript Developer.

You’ll be joining a small, high-calibre team building a platform to improve workflows within the the FinTech space. They have a genuinely interesting problem at the intersection of frontend engineering, backend systems, and applied LLM tooling.

This is a true 0–1 build, ideal if you enjoy ownership, clean abstractions, and shipping product quickly.

🧠 What You’ll Be Working On
  • Building and extending agent-driven workflows.
  • Developing context management and LLM entry points. Only application-layer LLM integrations, not model training)
  • Expanding slide generation functions and data structures.
  • Full-stack feature development, with a frontend-heavy bias
  • Collaborating closely with product and engineering stakeholders in a fast-moving environment

🛠️ Tech Stack
  • Next.js
  • TypeScript
  • Tailwind CSS
  • Node.js
  • PostgreSQL
  • Claude Agent SDK
  • Pydantic
  • AWS
  • Terraform
  • Modal Sandboxes

📩 Interested?
Apply now or send your latest CV to matthew.carter@opusrs.com ASAP!
If you haven’t heard back within 48 hours, please assume your application was not successful this time.
ÂŁ500.00 - ÂŁ600.00
Per day
ÂŁ500 - ÂŁ600 per day

Tirupati

Contract

Added 13/04/2026
Reference: MC-753

Contract Full-Stack JavaScript Developer - AI Platform

Tirupati
Contract

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