Javascript Developer

Node.js Contractor – AI Tool Replatforming

Remote | Outside IR35 | £450–500/day

We are looking for an experienced Node.js contractor to help replatform and modernise an internally developed AI-driven data platform.

The existing tool was rapidly developed by a member of the technical team using AI-assisted development tools and is currently running locally on a laptop environment. We now need an experienced engineer to rewrite/refactor the application into a secure, production-ready Node.js solution suitable for deployment within our server infrastructure.

The Role

You will take ownership of analysing the current Python-based application and rebuilding/refactoring it into a scalable and maintainable Node.js platform.

The application:

• Pulls data from multiple external sources including:
• RSS feeds
• Websites
• APIs
• Processes and stores data within a database
• Includes a front-end interface for displaying and interacting with the data

A key part of the engagement will be ensuring the rebuilt platform is secure, robust, and capable of passing penetration/security testing.

Required Skills & Experience

• Strong commercial experience with Node.js
• Experience refactoring or rewriting existing applications
• Solid understanding of secure software engineering practices
• Experience building applications that integrate with APIs, web scraping, and data feeds
• Database design and integration experience
• Front-end development capability (React/Vue/modern JS frameworks beneficial)
• Experience deploying applications into production server environments
• Understanding of authentication, security hardening, and application resilience
• Ability to work independently and make pragmatic architectural decisions

Desirable

• Previous experience working with AI/LLM-powered applications
• Python experience to help interpret the existing codebase
• Experience preparing systems for penetration testing/compliance review
• DevOps/cloud infrastructure experience

Contract Details

• Contract: Outside IR35
• Rate: £450–500 per day
• Location: Fully remote
• Start: ASAP
• Duration: Initially 10-12 weeks but potential for extension

We’re looking for someone pragmatic, technically strong, and comfortable taking an early-stage internal tool and turning it into a secure, production-grade platform.