AI Engineer - GraphRAG

Role Summary

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

environments.

• 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

data pipelines.

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

influence trading decisions.

• 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.