Junior Data Scientist

Welcome to Haleon. We’re a purpose-driven, world-class consumer company putting everyday health in the hands of millions. In just three years since our launch, we’ve grown, evolved and are now entering an exciting new chapter – one filled with bold ambitions and enormous opportunity.

Our trusted portfolio of brands – including Sensodyne®, Panadol®, Advil®, Voltaren®, Theraflu®, Otrivin®, and Centrum® – lead in resilient and growing categories. What sets us apart is our unique blend of deep human understanding and trusted science.

Now it’s time to fully realise the full potential of our business and our people. We do this through our Win as One strategy. It puts our purpose – to deliver better everyday health with humanity – at the heart of everything we do. It unites us, inspires us, and challenges us to be better every day, driven by our agile, performance-focused culture.

About the Role

At Haleon, Digital & Technology is transforming how we leverage data, artificial intelligence and advanced analytics to drive innovation across our global business. As part of this transformation, we are expanding our Generative AI capabilities and are seeking a talented Gen AI Data Scientist to help build and deploy next-generation AI solutions at enterprise scale.

This is an exciting opportunity to work at the forefront of Generative AI, developing Large Language Model (LLM)-based applications and agentic AI solutions that solve real business challenges. You will work with cutting-edge technologies, collaborate with multidisciplinary teams, and play a key role in shaping Haleon's AI strategy and capabilities.

The role is ideally suited to a technically strong Junior Data Scientist with hands-on experience in machine learning, natural language processing, LLMs and AI application development who is passionate about turning innovation into business value.

Key Responsibilities

• Conceptualise, prototype and deploy innovative solutions using state-of-the-art Large Language Models
• Design and build agentic AI workflows using Foundry or equivalent AI orchestration frameworks.
• Improve model performance through prompt engineering, prompt tuning and model fine-tuning techniques.
• Develop scalable evaluation, monitoring and performance measurement pipelines for AI models and agentic systems.
• Collaborate with business stakeholders, product teams and technical specialists to define requirements and deliver impactful solutions.
• Apply machine learning and NLP techniques to solve complex business and technical challenges.

Qualifications & Experience

Essential

• MSc or higher qualification in a STEM subject such as Computer Science, Data Science, Mathematics, Engineering, Physics or a related discipline.
• Strong proficiency in Python and experience developing production-quality code.
• Solid understanding of machine learning concepts, including model training, hyperparameter optimisation, experiment tracking and model evaluation.
• Practical experience working with Large Language Models (LLMs), including GPT models, BERT, Word2Vec, GloVe and related technologies.
• Experience developing solutions using Generative AI, Natural Language Processing (NLP) and Agentic AI techniques.
• Hands-on experience with deep learning frameworks such as TensorFlow, PyTorch, Keras, Hugging Face and LangChain.

Desirable

• Experience with coding assistants and AI development tools such as Codex, Claude or equivalent technologies.
• Experience working with Microsoft Azure and cloud-based AI services.
• Experience deploying machine learning models and AI applications through REST APIs.

Why Join Haleon?

This is an opportunity to help shape the future of AI within a global consumer health organisation. You will work on high-impact projects, leveraging cutting-edge Generative AI technologies to solve real-world business challenges and create value across our enterprise.

You'll collaborate with leading data scientists, engineers, product teams and business stakeholders while gaining exposure to some of the latest advancements in artificial intelligence and machine learning.

If you're passionate about Generative AI, large language models and building innovative AI-powered solutions that can transform the way people work, we'd love to hear from you.

Job Posting End Date

2026-10-14

Equal Opportunities

Haleon are committed to mobilising our purpose in a way that represents the diverse consumers and communities who rely on our brands every day. It guides us in creating an inclusive culture, where different backgrounds and views are valued and respected – all in support of understanding and best serving the needs of our consumers and unleashing the full potential of our people. It’s important to us that Haleon is a place where all our employees feel they truly belong.

During the application process, we may ask you to share some personal information, which is entirely voluntary. This information ensures we meet certain regulatory and reporting obligations and supports the development, refinement, and execution of our inclusion and belonging programmes that are open to all Haleon employees.

The personal information you provide will be kept confidential, used only for legitimate business purposes, and will never be used in making any employment decisions, including hiring decisions.

Adjustment or Accommodations Request

If you require a reasonable adjustment or accommodation or other assistance to apply for a job at Haleon at any stage of the application process, please let your recruiter know by providing them with a description of specific adjustments you are requesting. We’ll provide all reasonable adjustments to support you throughout the recruitment process and treat all information you provide us in confidence.

Note to candidates

The Haleon recruitment team will contact you using a Haleon email account (@haleon.com). If you are not sure whether the email you received is from Haleon, please get in touch.