Aubay UK is seeking an experienced AI Engineer with deep expertise in GraphRAG, knowledge graphs and modern AI engineering to join a high-profile Trading & Supply Emerging Technology initiative. This is a 6‑month contract inside IR35 focused on researching, prototyping and scaling advanced AI capabilities that combine LLMs, graph-based retrieval, semantic technologies and agentic AI. The role will work closely with front-office users to identify high-value opportunities, validate hypotheses and build solutions with a credible path to production.
Location
Waterloo, London. Hybrid working model with 2–3 days per week onsite.
Required Skills and Experience
- Strong hands-on experience designing and delivering GraphRAG solutions in enterprise
- Experience with Azure AI Foundry (or equivalent AI platforms), LangChain and/or LangGraph.
- Practical expertise in knowledge graph design, graph schemas, ontologies, entities, relationships and traversal patterns.
- Experience combining knowledge graphs with LLMs, RAG architectures and semantic/vector retrieval.
- Experience with graph databases such as Neo4j or equivalent technologies.
- Strong AI engineering and software development experience using modern programming frameworks and cloud-native architectures.
- Experience building scalable solutions using LLMs, AI agents and advanced AI frameworks.
- Strong understanding of semantic modelling, GraphQL and graph-based architectures.
- Experience supporting or building technology for front-office trading teams.
- Practical understanding of how trading decisions are informed by market data, analytics, positions, forecasts and qualitative information.
- Experience evolving experimental concepts into scalable production-ready solutions.
- Strong understanding of APIs, cloud platforms, enterprise integration, data engineering and
Desired Skills and Experience
- Experience within commodities, energy or trading markets.
- Knowledge of agentic AI, semantic layers and advanced retrieval technique
- Experience working with traders, quantitative analysts, market analysts or trading technology teams.
- Understanding of market fundamentals, pricing, exposures, forecasts and physical trading flows.
- Awareness of how qualitative information such as news, regulation and geopolitical events
- Knowledge of Trading & Supply business processes across front, middle and back office functions.
Role Responsibilities
- Design and build GraphRAG and knowledge graph-based AI solutions.
- Create graph data models, ontologies and semantic representations for complex business domains.
- Develop retrieval and reasoning approaches combining graph traversal, vector search and LLM capabilities.
- Partner directly with front-office users to understand workflows, challenges and decisionmaking processes.
- Research and evaluate emerging AI technologies and techniques.
- Rapidly prototype innovative solutions and assess commercial value.
- Build solutions with scalability, maintainability and production adoption in mind.
- Translate complex business and trading concepts into AI-ready technical models.
- Integrate AI solutions using APIs, GraphQL and enterprise platforms.
- Contribute to AI architecture, strategy, governance and responsible deployment practices.
- Support evaluation, monitoring and guardrails for AI-enabled capabilities.
- Focus on a small number of strategic priorities to maximise business impact.
About Aubay UK
Aubay UK is a trusted IT insourcing and business scaling partner, helping organisations deliver transformation through high-performing teams, offering roles across London, the West Midlands and Belfast. Based in Canary Wharf, we take on a people-first approach, enabling IT consultants to work on meaningful projects across the Energy, FinTech, and financial services sectors, while building stable careers, gaining valuable project exposure and benefiting from long-term development in a supportive working environment. Built on reliability and partnership, and backed by a wider global Aubay Group network of more than 9,000 experts, we offer a low-risk, high-value delivery model.
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AI Engineer - GraphRAG employer: Aubay UK
Aubay UK is an exceptional employer, offering a dynamic work environment in the heart of London Waterloo, where innovation meets sustainability in the energy sector. As a Principal AI Data Engineer, you will be part of a major transformation programme, with opportunities for professional growth and collaboration on cutting-edge AI solutions that contribute to a lower-carbon future. The company fosters a culture of excellence, providing employees with the resources and support needed to thrive in their careers while making a meaningful impact.
