Data Scientist

Just Eat Holding; West of England; On-site; GBP 90,000 - 140,000; Full time

Job summary

Just Eat Takeaway.com is seeking a data science professional to join the Partner Algorithms team in the UK. You will build end-to-end ML/AI solutions, including embedding models, fine-tuned LLMs, and ranking systems to boost customer engagement and order growth across multiple markets.

Strong coding, experimentation, and collaboration with product teams are essential. You will contribute to production-ready ML systems, run A/B experiments with statistical rigour, and stay current with advances

Qualifications

• Experience designing and running production-grade ML solutions.
• Strong Python coding, clean, testable code for large-scale systems.
• Proficient SQL skills for complex data warehouses and pipelines.
• Ability to explain technical results to non-technical stakeholders.

Responsibilities

• Develop and deploy ML/AI solutions (embedding models, LLMs, ranking) to drive engagement and orders.
• Apply generative AI techniques to personalization at scale for millions of users.
• Own experiments from design to interpretation and business impact.
• Collaborate with ML engineers to productionise models and maintain robust pipelines (MLOps).
• Translate business questions into modelling approaches and communicate findings clearly.
• Write production-quality Python and efficient SQL for scalable data analysis.

Skills

A/B testing

Python

SQL

Communication

Autonomy

Job description

Ready for a challenge?

Then Just Eat Takeaway.com might be the place for you. We're a leading global online delivery platform, and our vision is to empower everyday convenience.Whether it's a Friday-night feast, a post-gym poke bowl, or grabbing some groceries, our tech platform connects tens of millions of customers with hundreds of thousands of restaurant, grocery and convenience partners across the globe.

About this role

Join our Partner Algorithms team and help build the intelligence behind Just Eat's marketplace, powering personalised experiences for tens of millions of customers across 14 countries. This is your opportunity to deliver end-to-end machine learning solutions that directly impact customer engagement and order growth.We're building JET's recommendation systems, generating personalised carousels of restaurants to help people find their order right on the home page of the app. We're looking for someone who can live our behaviours of lead, deliver and care while bringing technical excellence and innovation.This role sits at the intersection of cutting-edge AI as we integrate, train and develop ML and generative models into a live production environment. Help us compute data at scale for millions of users to help people find the food they want.

We need someone who can challenge assumptions, translate ambiguous business problems into elegant technical solutions, and ship production-quality ML systems that make a measurable difference to our customers and partners.

These are some of the key components to the position:

• Work within a team on the development and deployment of ML/AI solutions including embedding models, fine-tuned LLMs, and ranking systems that drive engagement and orders while raising the bar for technical excellence.
• Apply generative AI and LLM techniques to personalisation challenges at scale, generating recommendations for millions of customers
• Own your results by designing, running and interpreting A/B experiments with statistical rigour, measuring real impact on business metrics and holding yourself accountable.
• Collaborate with ML engineers to productionise models, implementing MLOps best practices and maintaining monitored pipelines that deliver consistent value.
• Break down silos by translating complex business questions into clear modelling approaches and communicating results effectively to product and commercial stakeholders.
• Be determined to take end-to-end ownership of well-scoped workstreams, independently framing problems, choosing approaches, running experiments and presenting findings.
• Move fast by writing production-quality Python code and efficient SQL for data pipelines and analyses that can scale across our marketplace.
• Aim higher by staying current with advances in search, retrieval, recommendations and LLM applications, bringing fresh ideas to drive the vision forward.

What will you bring to the team?

• Strong experimentation skills with ability to design and interpret A/B tests, reason about statistical significance, and understand the gap between offline and online performance.
• Production-grade Python coding abilities that go beyond notebooks, writing clean, testable code suitable for engineering workflows and collaboration with technical teams.
• Proficient SQL skills across complex data warehouses, including partitioning, window functions, and large-table joins, with focus on query efficiency and data quality.
• Excellent problem-framing and communication skills to translate ambiguous business questions into modelling approaches and explain technical results to non-technical stakeholders based on respect and mutual support.
• Self-starter attitude comfortable with autonomy and ambiguity, thriving in fast-paced environments where you can build rapidly, test rigorously and roll out successes at scale.
• Strong collaboration skills to work effectively with senior data scientists, ML engineers, product partners and commercial teams across different levels and functions.

This role will involve a lot of learning from experienced senior data scientists and a great opportunity to develop your skillset. If you are missing any specific point but are enthusiastic about the space and have evidence of taking your own initiative to upskill then don't hesitate to apply.

Bonus skills that will help you excel:

• Hands-on expertise in search, retrieval and recommendation techniques including embedding-based approaches, learning-to-rank, and vector similarity search with measurable business impact.
• Practical experience applying LLMs in production environments, including prompt engineering, fine-tuning, structured output validation and assessing generative output quality.
• Familiarity with real-time data pipelines and streaming infrastructure.

At JET, this is how we play

Our teams forge connections internally and work with some of the best-known brands on the planet, giving us truly international impact in a dynamic environment.Being the best at what we do isn't just abou