AI Engineer - RAG (Retrieval-Augmented Generation) / Vector Databases and Langchain

Contract Role: AI Engineer - RAG (Retrieval-Augmented Generation) / Vector Databases and Langchain Contract Location: London. 2/3 days hybrid Contract Duration: 6 months Contract Start Date: Immediate Contract Classification: Inside IR35 Role Overview We are supporting a leading financial services organisation in hiring an experienced AI Engineer to support the development and optimisation of advanced GenAI solutions. This role will focus heavily on Retrieval-Augmented Generation (RAG), Vector Databases, Prompt Engineering, and LangChain frameworks to enhance enterprise AI capabilities. The successful candidate will play a key role in designing, building, and improving scalable AI applications, working closely with technical and business stakeholders to deliver high-impact solutions within a fast-paced environment. Key Responsibilities • Design, build, and optimise AI solutions using Retrieval-Augmented Generation (RAG) frameworks • Develop and maintain integrations with Vector Databases for efficient retrieval and contextual generation • Work extensively with LangChain to build and enhance LLM-based applications • Apply strong Prompt Engineering techniques to improve model performance and output quality • Develop scalable Python-based solutions to support GenAI initiatives • Collaborate with engineering, architecture, and business teams to translate requirements into technical delivery • Support continuous improvement of AI workflows, performance, and governance standards • Contribute to documentation, testing, and deployment best practices Required Skills & Experience • Strong Python development experience • Proven experience with Prompt Engineering and LLM optimisation • Hands-on experience with Retrieval-Augmented Generation (RAG) • Strong understanding of Vector Databases and retrieval frameworks • Experience using LangChain in enterprise or production environments • Experience working within cloud-based infrastructure and modern engineering environments • Strong problem-solving and stakeholder management skills Preferred Skills • Experience with Microsoft Azure • Experience with Agent Development Kit (ADK) • Exposure to enterprise AI governance and production deployment of GenAI solutions • Financial services experience preferred but not essential