Senior Machine Learning Engineer

Deliveroo

SENIOR 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. We’re looking for a Senior Machine Learning Engineer to join our London team. In this role, you’ll help shape the decision-making systems that directly impact customer experience, trust, and fairness at Deliveroo. This role is based in our London office with a hybrid setup, typically 3 days in the office. WHAT YOU’LL BE DOING You’ll be joining the Care team. Care is an area with significant opportunity and real customer impact; you’ll take ownership of existing models and help define strong ML foundations in spaces that are still evolving, from LLM-powered automation to customer compensation logic. Here’s what your day-to-day might look like: * Own the full ML lifecycle: Lead the design, development, and productionisation of machine learning models used in customer support and high-stakes decision systems. * Architect for reliability: Build robust monitoring, evaluation, and alerting frameworks to detect model underperformance, drift, or unexpected behaviour in real-time. * Collaborate on product strategy: Partner closely with Product Managers to turn ambiguous customer problems into robust, scalable ML solutions. * Drive technical excellence: Provide technical leadership in areas with unclear ownership, setting the gold standard for ML quality, reliability, and maintainability. * Bridge science and engineering: Work with data scientists and engineers across the global organisation to embed models into high-performance, scalable systems. WHAT YOU’LL NEED TO THRIVE Essential * Significant experience as an ML Engineer or Data Scientist, with a proven ability to write high-quality production code in Python. * Demonstrated ownership of productionising Generative AI workstreams or Agentic AI projects, including a deep understanding of LLMs, transformers, and fine-tuning. * Proven ability to deploy and manage models using modern infrastructure tools such as Docker, Kubernetes, and CircleCI. * Strong foundational knowledge of traditional ML and evaluation techniques, balanced with a bias for simplicity and measurable business impact. * A collaborative mindset with experience mentoring peers and a drive to solve complex, real-world problems at scale. Nice to Have * Experience with evaluation harnesses and frameworks specifically designed for Generative AI. * Familiarity with observability, monitoring, and safety techniques for deployed GenAI systems. * Experience working with strongly typed languages, such as Go. WHY JOIN US? At Deliveroo, you’ll do work that matters—solving real-world problems in a three-sided marketplace that’s constantly evolving. We’re food lovers, problem solvers, community builders and more, brought together by a shared drive to make things better. Working here you can expect to: 🔧 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. 💰 Share in the success you help create Competitive salary and equity options, so you’re rewarded for the impact you make. ➡️ Want a deeper look at how we build? Check out our Tech Blog. OUR GLOBAL STRUCTURE Deliveroo is now part of DoorDash, bringing together teams with even greater reach, scale, and ambition. Depending on your role, you may collaborate with teammates, systems, and leaders across DoorDash and Wolt. Together, we’re unlocking new possibilities as one global team. 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 have a disability or long-term health condition and need support to apply for one of our roles, or require any reasonable adjustments during the recruitment process, you’ll have the opportunity to let us know once you’ve submitted your application. We’ll share details on how to request support so we can ensure you have a fair and equitable experience. If you’re excited about making a real impact in a fast-moving marketplace and growing your career alongside ambitious, supportive teams, we’d love to hear from you!

Deliveroo

SENIOR 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 Global 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. We’re looking for a Senior Machine Learning Engineer to join our London office as part of a Global DoorDash engineering team (working hybrid, 3 days in the office). You’ll be conceptualizing, designing, implementing, and validating algorithmic improvements to the search and personalization experiences at the heart of our fast-growing New Verticals business, encompassing grocery, convenience, and retail delivery. WHAT YOU’LL DO You’ll be joining the New Verticals Personalisation team (Search & Recommendations). This team sits at the heart of how customers discover and shop across grocery, convenience, and retail categories, and is a key driver of the growth of Deliveroo's expanding New Verticals business. Working across the wider DoorDash engineering team, you’ll help shape intelligent, consumer-facing experiences that solve real customer problems at scale. This role spans a broad range of cutting-edge machine learning challenges, including modern recommendation and ranking systems, real-time decisioning as well as GenAI-powered experiences. Here’s what your day-to-day might look like: * Design and build production-grade machine learning and optimisation systems that power Deliveroo's New Verticals search and recommendations at scale. * Partner with engineering and product leaders to help shape the product roadmap leveraging ML. * Provide technical leadership across multiple product areas, identifying and prioritising opportunities for high-impact algorithmic improvements. * Mentor junior team members, and lead cross functional pods to generate collective impact across the business. WHAT YOU’LL NEED TO THRIVE Our ideal candidate will bring strong expertise in some of these areas and curiosity to grow in others: * Proven track record of designing and shipping impactful algorithms that deliver measurable business outcomes in a production environment. * Deep expertise in applied ML for Search/NLP/IR/RecSys - both classical and deep learning based. Additional familiarity with explore/exploit/MAB algorithms, LLMs, and causal inference techniques are a plus. * Machine learning background in Python; experience with PyTorch or TensorFlow preferred. * Ability to think holistically about business problems, moving beyond technical implementation to influence long-term strategy and roadmap. * Excellent communication and stakeholder management skills, with the ability to influence both technical and non-technical leaders across the global organisation. WHY JOIN US? At Deliveroo, you'll do work that matters—solving real-world problems in a three-sided marketplace that’s constantly evolving. We’re food lovers, problem solvers, community builders and more, brought together by a shared drive to make things better. Working here you can expect to: 🔧 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. 💰 Share in the success you help create Competitive salary and equity options, so you’re rewarded for the impact you make. ➡️ Want a deeper look at how we build? Check out our Tech Blog. OUR GLOBAL STRUCTURE Deliveroo is now part of DoorDash, bringing together teams with even greater reach, scale, and ambition. Depending on your role, you may collaborate with teammates, systems, and leaders across DoorDash and Wolt. Together, we’re unlocking new possibilities as one global team. 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 have a disability or long-term health condition and need support to apply for one of our roles, or require any reasonable adjustments during the recruitment process, you’ll have the opportunity to let us know once you’ve submitted your application. We’ll share details on how to request support so we can ensure you have a fair and equitable experience. If you’re excited about making a real impact in a fast-moving marketplace and growing your career alongside ambitious, supportive teams, we’d love to hear from you!

Deliveroo

DATA SCIENCE MANAGER Join us in our mission to transform the way people shop and eat, where impact, innovation and growth drive everything we do. Our Data Science organisation sits at the heart of Deliveroo, powering decision-making across product, commercial and operational teams through experimentation and causal inference. We’re hiring multiple Data Science Managers across different areas of the business. Rather than hiring for one fixed team, we use the interview process to understand your strengths, interests and development areas, and then align you to the right scope, level and team. WHAT YOU’LL BE DOING You’ll own the analytical direction and measurable impact of a product or business area, while leading and developing a high performing team of data scientists or machine learning engineers. Depending on the area you join, you could be: * Building experimentation and causal inference frameworks to improve customer retention, loyalty and subscription growth * Leading pricing, promotions or value strategy, balancing growth, profitability and long term customer trust * Improving discovery, search or personalisation through rapid iteration on high impact algorithms * Driving customer acquisition and engagement across restaurants, retail or new verticals using data-led targeting and incentives Across all roles, you’ll remain hands-on while managing a team. You’ll decide which problems are worth solving and ensure data science work translates into better product and commercial decisions, not just analysis. You'll partner with Product, Engineering, Ops, Marketing and Finance as a thought partner, and set the bar for analytical rigour, prioritisation and impact across noisy metrics, real trade-offs and strong stakeholder opinions. WHAT YOU’LL NEED TO THRIVE Our ideal candidate will bring strong expertise in some of these areas and curiosity to grow in others: * Experience line managing data scientists and supporting their career development * A strong background as a senior individual contributor, with hands-on experience in experimentation, causal inference or applied machine learning * Proven ability to identify high impact opportunities and turn insights into clear strategy and execution * Confidence working with senior stakeholders and explaining complex technical concepts to non-technical audiences * Comfort operating in fast moving, ambiguous environments where prioritisation and judgement matter as much as technical skill WHY JOIN US? At Deliveroo, you’ll work on real world problems at global scale, across a three-sided marketplace that is constantly evolving. We’re food lovers, problem solvers, community organisers and more, united by a shared drive to make things better. Working here, you can expect: * High autonomy to shape strategy and deliver meaningful impact * Support to learn and grow through L&D programmes, mentoring and peer learning * A strong focus on wellbeing, with benefits that vary by country * A place to belong, with a diverse global workforce and active employee communities DIVERSITY, EQUITY AND INCLUSION At Deliveroo, we believe great workplaces reflect the world around us. We welcome candidates from all backgrounds regardless of age, gender, ethnicity, disability, sexual orientation, gender identity, socio-economic background, religion or belief. If you require adjustments at any stage of the application or interview process, please let us know. We’re committed to ensuring everyone has an equitable opportunity to succeed. Ready to own impact and shape how decisions are made at Deliveroo? Apply today.