Principal Machine Learning Engineer at ASOS

Department: Tech - Digital ProductSeniority in posting: senior

Setup: Hybrid
Location: London, England
Type: Full-time
Level: staff+
Posted: Sep 25, 2026

Description

ASOS is hiring a Principal Machine Learning Engineer for its Search & Discovery team to define the technical architecture and long-term direction of AI-powered fashion discovery. The role owns large-scale recommendation, retrieval, personalisation, search relevance, deep learning, and generative AI systems; leads production delivery, scalability, reliability, and MLOps; and provides technical leadership, mentoring, and stakeholder influence across engineering teams.

Required Skills

Machine learning
Technical architecture
Recommendation systems
Deep learning
Large language models
Python
MLOps
RAG

Additional Information

Required Previous Experiences: Extensive experience designing, building, and operating large-scale machine learning systems in production environments
Experience owning and influencing technical architecture across complex engineering ecosystems
Extensive experience across the machine learning lifecycle, including data analysis, feature engineering, model development, evaluation, deployment, monitoring, and continual improvement
Experience building scalable, observable, and highly reliable machine learning services using cloud-based technologies, distributed infrastructure, and large datasets
Experience setting architectural direction, driving engineering strategy, and encouraging adoption of technical standards across teams
Experience mentoring senior engineers and supporting wider engineering development
Translation Company Name: ASOS