Senior AI Engineer - LLM Systems & Orchestration

asos.com Ltd; Greater London; Hybrid; GBP 120,000 - 180,000; Full time

Benefits offered by this job

Employee sample sales

25 days paid annual leave + an extra

Discretionary bonus scheme

Private medical care scheme

Flexible benefits allowance - cash or…

Personalised learning opportunities

Job summary

ASOS is hiring a Senior AI / LLM Engineer to design and industrialise core AI capabilities powering ASOS. You’ll build reusable, production-grade AI platforms that scale across the business, solving deep technical problems in models, reasoning systems, and orchestration.

You’ll work on systems at real scale, partnering with Trust & Security to embed AI risk controls and driving horizontal reuse across squads for cost-effective, high-performance AI solutions.

Qualifications

• Strong hands-on experience with the Azure AI ecosystem— including Azure OpenAI, Azure AI Studio, and Azure Machine Learning
• Experience building and running production-grade AI systems on cloud infrastructure (APIs, event-driven architectures, scalable compute such as AKS or similar)
• Proficiency in Python, with experience across modern AI frameworks (e.g. Semantic Kernel, LangChain or equivalents)

Responsibilities

• Design and build LLM-powered systems (RAG, fine-tuning, tool use, multi-agent orchestration)
• Develop agentic workflows for automation, reasoning, and conversational experiences
• Define patterns for autonomous + human-in-the-loop systems
• Build and scale solutions on the Azure AI stack (Azure OpenAI, AI Studio, Azure ML, Cognitive Services)
• Create reusable infrastructure: prompt orchestration layers, vector search and retrieval pipelines & evaluation and observability frameworks
• Design and implement LLM evaluation frameworks (offline + online)
• Implement AI safety guardrails (hallucination control, filtering, explainability)
• Partner with Trust & Security to embed AI risk controls by design
• Enable horizontal reuse across squads— building once, scaling many times
• Optimise systems for performance, cost, and reliability (token-aware design)
• Champion best practice in AI engineering, governance, and platform thinking
• Support a culture of inclusive, responsible AI development

Skills

Azure AI

Azure OpenAI

Python

LangChain

Semantic Kernel

AKS

RAG pipelines

LLM architectures

Agent orchestration

AI safety

Tools

Azure ML

Kubernetes

Job description

ASOS is hiring a Senior AI / LLM Engineer to design and industrialise core AI capabilities powering ASOS. You’ll build reusable, production-grade AI platforms that scale across the business, solving deep technical problems in models, reasoning systems, and orchestration.

You’ll work on systems at real scale, partnering with Trust & Security to embed AI risk controls and driving horizontal reuse across squads for cost-effective, high-performance AI solutions.