AI Engineer – Knowledge Graphs & Full-Stack UK Client | Remote | Contract About AIgnite Nexus AIgnite Nexus is a London-based enterprise AI company. We design and build AI use cases for our clients and develop our own AI products, with governance and responsible AI built in from day one. The role You will build AI solutions from idea to production, for our clients and for AIgnite Nexus. You will work directly with the founders in a small, fast-moving team. What you will do
• Turn business problems into practical AI use cases, from prototype to production
• Design and build knowledge graphs that connect data from many sources
• Build LLM features such as GraphRAG, retrieval and AI agents
• Develop backends in Python and Node.js, and frontends in React
• Make AI results explainable and traceable, so clients can trust them What we are looking for
• Strong, hands-on experience building knowledge graphs (essential)
• Graph databases such as Neo4j, and query languages such as Cypher or SPARQL
• 4+ years of software engineering experience
• Expert Python, plus strong React,
Node.js and TypeScript
• Hands-on experience with LLMs, RAG, embeddings and vector search
• Experience with SQL, Docker and a cloud platform (AWS, Azure or GCP)
• Clear communication with clients and non-technical people
• Self-motivated and comfortable working independently in a start-up Nice to have
• Experience building AI solutions for enterprise clients
• GraphRAG, LangChain, LlamaIndex or similar
• Ontology design (RDF, OWL) and entity resolution
What we offer
• Competitive salary
• Remote-first, flexible hours
• Direct work with the founders and real influence on what we build
• Holiday, pension and benefits package
• Budget to learn new tools and technologies
How to apply
Click "Apply" and send your CV with a short note about a knowledge graph you have built. A GitHub or portfolio link is welcome.
• AIgnite Nexus is an equal prospect employer. We welcome applicants of every background.