Machine Learning Engineer

Join us in our mission to transform the way people shop and eat, where impact, innovation and growth drive everything we do. Our Engineering teams tackle complex technical challenges across a global, three-sided marketplace, building and scaling systems that serve millions of customers, riders and partners every day. From real-time logistics to resilient infrastructure and marketplace optimisation, we design, build and operate technology that powers Deliveroo’s growth at scale.

In this role, you’ll enable high-quality machine decision-making to maximise ad relevance, performance, and revenue for our global partners.

What You’ll Be Doing

• You’ll be joining the Ads Machine Learning team. We are a high-impact group responsible for the in-house models powering Deliveroo's advertising products, focusing on ad ranking, automated bidding, and contextual bandit-based personalisation.
• Own the end-to-end lifecycle of machine learning models used in Ads ranking, bidding, and relevance systems, from initial design to productionisation.
• Build robust infrastructure for monitoring, evaluation, and alerting to detect model drift or performance issues in high-throughput pipelines.
• Collaborate cross-functionally with Product Managers and Engineers to translate complex advertising challenges into scalable ML solutions.
• Embed models into low-latency systems by partnering with data scientists and engineers to ensure seamless production integration.
• Champion technical excellence by following best practices for ML quality, reliability, and maintainability across the team.

What You’ll Need to Thrive

• Significant experience as an ML Engineer or Data Scientist, with a proven ability to write clean, production-grade Python code.
• Technical proficiency with modern engineering tools including Git, Docker, Kubernetes, and CI/CD workflows (e.g., CircleCI).
• Solid understanding of ML fundamentals, including supervised learning, ranking, or recommendation systems.
• A bias for simplicity, with a demonstrated focus on shipping work that drives measurable business impact.
• Strong communication skills, with the ability to work effectively in a collaborative, fast-paced team environment.
• Experience in Ad-Tech or auction-based systems is a plus, but not essential.

Why Join Us?

• Solve meaningful problems at real scale. Work on a complex, always-on marketplace that impacts millions every day.
• See your impact, fast. Ship, test and improve ideas quickly in a low-hierarchy, high-ownership environment.
• Grow through challenge and ownership. Take on big, ambiguous problems and accelerate your career with strong support.
• A culture built for builders. High standards, collaboration, flexible working and continuous learning.

Diversity, Equity and Inclusion

At Deliveroo, we know that a great workplace reflects the world around us and that true diversity and inclusion make us stronger, more creative, and better at what we do. We’re committed to fostering an environment where everyone can do their best work and feel they belong. We believe in equality of opportunity and welcome candidates from all backgrounds regardless of age, gender, ethnicity, disability, sexual orientation, gender identity, socio-economic background, religion, or belief.

If you’re excited about solving meaningful problems at scale and growing with a supportive team, we’d love to hear from you.