Machine Learning Engineer

Job Description

Machine Learning Engineer – Deliveroo Ads

Join us in our mission to enable the highest quality machine decision-making at Deliveroo. As part of the Ads Machine Learning team, you will be central to maximising ad relevance, performance, and revenue. Our mission is to connect consumers with relevant ads and empower our partners (merchants, grocers, and FMCG brands) to grow their business.

The Team

The Ads ML team is a high-impact group responsible for building and maintaining the in-house Machine Learning models that power Deliveroo's advertising product. We focus on three core areas to drive company profitability and partner success:

• Ad Ranking & Relevance: Developing recommender systems to ensure customers see the most relevant ads.

• Automated Bidding: Building engines to manage advertiser bids automatically and optimise return on ad spend (ROAS).

• Personalisation: Rely on contextual bandit techniques to personalise user experience by dynamically adjusting the volume of ads visible to each customer.

You will:

• Own the design, development, and productionisation of machine learning models used in Ads ranking, bidding, and relevance systems.

• Build monitoring, evaluation, and alerting frameworks to detect model underperformance, drift, or unexpected behaviour in our production Ads pipelines.

• Partner closely with Product Managers and Engineers to turn complex advertising challenges into robust, scalable ML solutions.

• Work with data scientists and engineers across the company to productionise models and embed them into high-throughput, low-latency systems.

• Contribute to technical excellence within the team by following and setting best practices for ML quality, reliability, and maintainability.

Requirements

• 3+ years' experience as an ML Engineer or Data Scientist

• 3+ years' experience writing production code in Python

• Experience using tools like Git, Docker, Kubernetes, CircleCI

• Solid understanding of ML fundamentals, including supervised learning, ranking, or recommendation systems (experience in Ad-Tech is a plus).

• You have a bias for simplicity and a focus on shipping work that drives measurable business impact.

• Strong communication skills and the ability to work effectively in a collaborative, cross-functional team.

• Experience mentoring others in the team.

Workplace & Benefits

At Deliveroo we know that people are the heart of the business and we prioritise their welfare. Benefits differ by country, but we offer many benefits in areas including healthcare, well-being, parental leave, pensions, and generous annual leave allowances, including time off to support a charitable cause of your choice. Benefits are country-specific, please ask your recruiter for more information.

Diversity

At Deliveroo, we believe a great workplace is one that represents the world we live in and how beautifully diverse it can be. That means we have no judgement when it comes to any one of the things that make you who you are - your gender, race, sexuality, religion or a secret aversion to coriander. All you need is a passion for (most) food and a desire to be part of one of the fastest-growing businesses in a rapidly growing industry.

We are committed to diversity, equity and inclusion in all aspects of our hiring process. We recognise that some candidates may require adjustments to apply for a position or fairly participate in the interview process. If you require any adjustments, please don't hesitate to let us know. We will make every effort to provide the necessary adjustments to ensure you have an equitable opportunity to succeed.