Senior AI Engineer in London - The Portfolio Group

We are partnering with an established organisation currently investing significantly in its AI and generative search capabilities. They are looking to appoint a Senior AI Engineer to play a key role in designing and delivering production-grade AI systems focused on accuracy, scalability, and real-world impact.

This position sits within a growing AI function and will focus heavily on Retrieval-Augmented Generation (RAG), agentic workflows, evaluation frameworks, and LLM optimisation.

Key Responsibilities:

• Design and develop scalable RAG pipelines and generative AI workflows
• Build solutions using LangChain, LangGraph, and LlamaIndex
• Implement retrieval strategies including reranking, chunking, and retrieval fusion
• Develop agentic workflows with a focus on robustness and maintainability
• Contribute to experimentation, evaluation, and AI quality frameworks
• Support fine-tuning, instruction tuning, and model optimisation initiatives
• Mentor junior engineers and contribute to technical best practices

Key Requirements:

• Strong Python engineering experience
• Commercial experience building production-grade AI/ML systems
• Hands-on experience with RAG architectures and LLM workflows
• Experience with LangChain, LangGraph, and/or Llama Index
• Understanding of evaluation methodologies for generative AI
• Experience working within scalable cloud environments (AWS preferred)
• Ability to operate in a senior or technical leadership capacity

Desirable:

• Graph-RAG experience
• Databricks exposure
• Experience deploying customer-facing AI systems

This is an excellent opportunity to join a forward-thinking organisation where AI is a genuine strategic priority and engineering quality is highly valued.

51752MSR2

INDLON

The Portfolio Group are acting on behalf of our client in recruiting for this position.