Lead ML Scientist, Recommender Systems at Scale

Relay; Greater London; Hybrid; GBP 150,000 - 210,000; Full time

Job summary

Relay is seeking a Principal Machine Learning Scientist in the United Kingdom to shape the future of our recommender systems. You will drive end-to-end development from research to production, designing models that power routing, pricing and delivery decisions at scale.

You will collaborate with Operational Research and data teams, bringing deep expertise in recommender systems, reinforcement learning and large language models.

Qualifications

• Built recommender systems at scale and in production.
• Deep expertise in recommender systems, reinforcement learning and LLMs.
• Ability to experiment and base decisions on evidence.

Responsibilities

• Set the standard for recommender systems at the company.
• Lead the evolution of the recommender from research to production.
• Design and build recommender systems powering key decisions.
• Partner with Operational Research to unite recommender models and optimisation.
• Contribute to the company's research culture and tech community.

Skills

Recommender systems

Reinforcement learning

LLMs

Education

PhD in related field

Tools

Python

TensorFlow/PyTorch

Job description

Relay is seeking a Principal Machine Learning Scientist in the United Kingdom to shape the future of our recommender systems. You will drive end-to-end development from research to production, designing models that power routing, pricing and delivery decisions at scale.

You will collaborate with Operational Research and data teams, bringing deep expertise in recommender systems, reinforcement learning and large language models.