Senior AI / LLM Engineer (Azure AI)

Location: hirify.global HQ in London; office-related benefits reference the Leavesden office.

Company

hirify.global is an online fashion retailer building customer experiences and operational systems used by millions.

What you will do

• Design and build production-grade LLM-powered systems using RAG, fine-tuning, tool use, and multi-agent orchestration.
• Develop agentic workflows for automation, reasoning, and conversational experiences.
• Build reusable AI infrastructure, including prompt orchestration, vector search and retrieval pipelines, and evaluation and observability frameworks.
• Develop offline and online LLM evaluation frameworks and implement safety guardrails for hallucination mitigation, filtering, and explainability.
• Partner with Trust & Security to embed AI risk controls into system design.
• Optimise AI platforms for performance, cost, reliability, and horizontal reuse across engineering squads.

Requirements

• Hands-on experience with Azure OpenAI, Azure AI Studio, Azure Machine Learning, and production cloud infrastructure.
• Strong Python skills and experience with modern AI frameworks such as Semantic Kernel or LangChain.
• Deep understanding of LLMs and transformer-based models, including embeddings, tokenisation, and context management.
• Experience designing end-to-end RAG pipelines, agent-based systems, multi-agent patterns, tool usage, and workflow orchestration.
• Experience implementing model evaluation, AI safety, governance, guardrails, secure scalable systems, and cost optimisation.

Culture & Benefits

• Employee discount and access to employee sample sales.
• 25 days of annual leave plus an additional celebration day.
• Discretionary bonus scheme, private medical care, pension contributions matched up to 5%, and a flexible benefits allowance.
• Personalised learning and career development opportunities.
• Summer hours with 3pm finishes on Fridays in June, July, and August.
• Free shuttlebus service between Watford station and the Leavesden office.