Senior Data Scientist

What You’ll do

Your key accountabilities will include:

• Use machine learning, recommender systems, and LLM-powered conversational AI to deliver deeply personalised product and outfit recommendations.
• Design, develop, and productionise end-to-end ML and GenAI systems, including retrieval, ranking, and LLM-based components powering conversational experiences.
• Design and develop frameworks for evaluating LLM outputs (e.g. relevance, grounding, safety, and user satisfaction) and integrate them into continuous experimentation pipelines.
• Partner cross-functionally to deliver production-ready solutions aligned to product and commercial goals.
• Contribute to best practices in model development, deployment, and monitoring across the team.

Who you are

Your skills and experience will include:

• Proven track record of owning ML/AI problems end-to-end — from framing and modelling through to production deployment, monitoring, and continuous improvement — delivering measurable business impact.
• Applies strong software engineering principles to build robust, scalable ML systems, taking responsibility for performance and reliability in production rather than handing off.
• Experience working with large-scale datasets and distributed data processing (e.g. Spark), and with modern recommendation or personalisation systems (e.g. large scale retrieval and ranking architectures, real-time inference, vector representations, approximate nearest neighbour search) at scale.
• Strong collaborator and communicator, comfortable working across Product, Engineering, and business teams.

Benefits

• After completing your probationary period, you’ll receive a 20% colleague discount across all M&S products and many of our third‑party brands for you and a member of your household.
• Competitive holiday entitlement with the potential to buy extra holiday days.
• Discretionary bonus schemes awarded based on how you achieve your personal objectives and our performance as a business.
• A generous Defined Contribution Pension Scheme and Life Assurance.
• A dedicated welcome to our teams with a tailored induction and a wide range of training programmes to develop your skills.
• Amazing perks and discounts via our M&S Choices portal to maximise your financial and personal wellbeing.
• Industry‑leading parental, adoption and neonatal policies, providing support and flexibility for your family.
• Access to a fantastic range of wellbeing support for all colleagues including access to our 24/7 Virtual GP and PAM Assist to support you and your family.
• A charity volunteer day to support a charity or cause you’re passionate about through a dedicated day away from work.

#J-18808-Ljbffr…