Full-Stack React Developer with Python Experience at UST Global, London, 6 Months initial, £Contract Rate

Full-Stack React Developer with Python Experience

Location: London

Hybrid working model-3 days from the client office in Central London

Permanent/Contract inside IR 35/ Fixed term contract for initially 6 months with possible extensions

Candidates with shorter notice periods and full work authorization in the UK will be given preference

We’re looking for a skilled Full-Stack React Developer with strong Python backend experience to join our team. You’ll be working on a next-generation conversational AI platform, helping to build robust, scalable applications that integrate with Large Language Models (LLMs). This is a chance to dive into cutting-edge AI technology while contributing to both the frontend and backend of a modern web app.

About the Platform

The platform includes features such as:

• Document integration with Microsoft 365 (OneDrive/SharePoint)
• Custom agent personas with configurable system instructions
• Multi-model LLM support with flexible backend options
• Rich conversation management with image support
• Document generation and audit logging
• Template-driven workflow automation

Technical Stack

Frontend:

• React 18+ with TypeScript
• Redux for state management
• Modern component architecture (TSX)
• Advanced image handling (drag-and-drop, copy/paste)
• Microsoft 365 API integration

Backend:

• Python with FastAPI
• Async/await for high-performance operations
• Strong typing practices (PEP 585)
• LLM service integrations
• Document processing and generation

Development Environment:

• Docker-based local development
• PNPM for package management
• UV for Python environments
• Modern development workflows

Key Responsibilities

Frontend Development (Primary)

• Build and maintain React components with TypeScript and Redux
• Develop responsive, user-friendly interfaces for conversational AI
• Implement advanced file handling (drag-and-drop, image processing)
• Create reusable UI components aligned with our architecture
• Integrate with Microsoft 365 APIs
• Optimize performance for real-time chat

Backend Integration & Support

• Collaborate on FastAPI backend services and API design
• Implement async Python functions for LLM integrations
• Work with document processing pipelines and logging systems
• Support containerization and deployment processes
• Improve error handling and system reliability

Full-Stack Contributions

• Design and implement features across frontend and backend
• Ensure smooth integration between React UI and Python APIs
• Take part in architecture discussions for new features
• Maintain clean, high-quality code following best practices

Required Qualifications

Frontend Expertise

• 3+ years of professional React experience
• Strong skills in TypeScript and modern JavaScript (ES6+)
• Solid knowledge of Redux for state management
• Experience with React hooks, context API, and modern patterns
• Background in component testing and frontend optimization

Python Background

• 2+ years of professional Python development
• Familiarity with FastAPI or similar frameworks (Django, Flask)
• Understanding of async/await and concurrent programming
• Strong grounding in modern Python typing and best practices
• Experience designing and consuming RESTful APIs

Technical Skills

• Proficiency with Git and collaborative workflows
• Experience with Docker and containerized apps
• Familiarity with build tools and package managers
• Knowledge of testing frameworks (frontend & backend)
• Awareness of cloud deployment practices

Preferred Qualifications

• Experience integrating Microsoft 365 services
• Knowledge of LLM/AI services (OpenAI, Azure Cognitive Services)
• Experience with document processing and generation libraries
• Background in enterprise-grade applications with audit needs
• Familiarity with Redux DevTools and advanced state patterns
• Experience with WebSockets for real-time features
• Understanding of accessibility standards and responsive design

If interested please apply with updated resume for an immediate discussion

#UST

React,Typescript,Redux, Python