Data Scientist, AI Growth — Hybrid (London/Amsterdam)

Just Eat Takeaway.com; Enfield; Hybrid; GBP 70,000 - 110,000; Full time

Job summary

Just Eat Takeaway.com is seeking a Data Scientist to join our AI Growth team in London or Amsterdam. You will help build end-to-end ML solutions, from data exploration to production deployment, influencing engagement and order growth across our marketplace.

You will work on embedding models, fine-tuned LLMs, personalized recommendations, and robust A/B experiments, partnering with ML engineers, product teams and commercial stakeholders to ship impact at scale.

Qualifications

• Experience delivering end-to-end ML solutions from problem framing through data exploration to production deployment and experiment measurement.
• 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.
• 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.

Responsibilities

• Lead 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, generating customer and partner representations that improve search relevance and app experiences.
• 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.
• Contribute to JET's foundation model platform and personalised targeting systems, pushing boundaries to create lasting impact across millions of customer interactions.
• Set clear goals by designing experiments that influence commercial decisions while ensuring statistical validity and actionable insights.
• Aim higher by staying current with advances in search, retrieval, recommendations and LLM applications, bringing fresh ideas to drive the AI Growth vision forward.

Skills

ML/AI development

Embedding models

Fine-tuned LLMs

Rankings systems

Python

SQL

MLOps

A/B testing

Data pipelines

Problem framing

Tools

Airflow

Spark

Pandas

Git

Job description

Just Eat Takeaway.com is seeking a Data Scientist to join our AI Growth team in London or Amsterdam. You will help build end-to-end ML solutions, from data exploration to production deployment, influencing engagement and order growth across our marketplace.

You will work on embedding models, fine-tuned LLMs, personalized recommendations, and robust A/B experiments, partnering with ML engineers, product teams and commercial stakeholders to ship impact at scale.