Senior AI Platform Engineer: Scalable LLM Systems

ASOS.com Ltd; Camden Town; On-site; GBP 90,000 - 150,000; Full time

Benefits offered by this job

Employee discount

Sample sales

25 days annual leave + celebration day

Discretionary bonus scheme

Private medical care scheme

Flexible benefits allowance

Learning opportunities

Job summary

ASOS.com Ltd hires a Senior AI / LLM Engineer to design and industrialise core AI capabilities powering ASOS. You will create reusable, production-grade AI platforms used by teams across ASOS, enabling scalable, responsible AI at a global platform.

This role focuses on system-level thinking, not just feature delivery, and operates in ambiguity to solve frontier AI problems. Responsibilities include designing LLM-powered systems, agentic workflows, and scalable pipelines on Azure, with emphasis

Qualifications

• Experience with the Azure OpenAI/AI Studio/ML stack in production environments.
• Proven ability to design and implement large-scale LLM-powered systems.
• Strong focus on safety, governance, and guardrails in AI applications.
• Ability to build reusable AI platforms and promote cross-squad reuse.

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 pipelines & Evaluation observability.

Skills

System design

LLM architectures

AI safety

Observability

Cost optimization

Production-grade systems

Cross-functional collaboration

Tools

Azure OpenAI

Azure AI Studio

Azure Machine Learning

AKS

Semantic Kernel

LangChain

Job description

ASOS.com Ltd hires a Senior AI / LLM Engineer to design and industrialise core AI capabilities powering ASOS. You will create reusable, production-grade AI platforms used by teams across ASOS, enabling scalable, responsible AI at a global platform.

This role focuses on system-level thinking, not just feature delivery, and operates in ambiguity to solve frontier AI problems. Responsibilities include designing LLM-powered systems, agentic workflows, and scalable pipelines on Azure, with emphasis