Javascript Developer

Node.js Contractor – AI Tool Replatforming

Remote | Outside IR35 | £450–500/day

Read the overview of this opportunity to understand what skills, including and relevant soft skills and software package proficiencies, are required.

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
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• 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.