Full Stack Engineer

⏳ 12-month initial contract – with extensions

I’m looking for an experienced Full-Stack Developer to join a technology team building modern, production-grade applications with React, Python and Generative AI at their core.

This is a genuinely hands-on engineering role for someone who enjoys working across the stack – building polished frontend experiences, designing robust backend services and APIs, and developing applications that integrate LLMs, tools and AI agents.

You won’t simply be maintaining existing applications. You’ll be helping shape and build new digital products where traditional software engineering meets the rapidly evolving world of LLM-powered applications and agentic AI.

What You’ll Be Doing:

• Design and develop production-grade full-stack applications using React.js and Python
• Build modern, responsive frontend applications with React
• Develop scalable backend services using Python and FastAPI
• Design and build robust REST APIs, including authentication and API versioning
• Build applications incorporating Large Language Models (LLMs)
• Develop and implement prompting, tool-use and agent-based application patterns
• Integrate AI capabilities into real-world products and workflows
• Work across the full software development lifecycle, from design and architecture through to production
• Collaborate with product, engineering and other technical stakeholders to turn requirements into scalable solutions
• Maintain strong engineering standards around performance, reliability and maintainability

What We’re Looking For:

• 6+ years of full-stack development experience
• Strong, production-level React.js experience
• Strong backend development experience with Python
• Hands-on experience with FastAPI
• Strong API development experience, particularly REST API design
• Good understanding of authentication and API versioning
• Practical experience building applications using LLMs
• Understanding of modern LLM application patterns including prompts, tools and agents
• Comfortable owning features across both frontend and backend development
• Strong software engineering fundamentals and a product-focused mindset

Core Technology

Frontend: React.js

Backend: Python, FastAPI

APIs: REST, Authentication, API Versioning

AI / LLM: Large Language Models, Prompt Engineering, Tool Use, AI Agents

Why This Role?

This is a great opportunity for an experienced full-stack engineer who wants to move beyond traditional web development and work on products where AI is an integral part of the application architecture.

Salt is acting as an Employment Business in relation to this vacancy.