Senior Data Scientist

This section tells you all you need to know about the position and its responsibilities, outlining everything we hope to see in a successful candidate., * Problem Framing : Proven ability to translate business challenges into well-defined DS/ML or optimisation problems and select appropriate approaches to deliver value

• Problem Solving: Apply statistical, machine learning, and optimisation methods to address ambiguous, high-impact business problems across the retail value chain (e.g., inventory optimisation, demand forecasting, clustering, pricing)
• ML System Design & Productionisation : Lead the design, development, testing, evaluation, and monitoring of predictive models in a production environment
• Cross-Functional Collaboration: Work closely with Data Engineers, MLOps, Product Managers, and business stakeholders to align data science initiatives with the organisation's commercial strategy and priorities
• Technical Leadership : Drive the adoption of best practices in coding standards (e.g., code reviews, testing, documentation), exploratory analysis, model development, evaluation, and monitoring, At M&S, we have Data Scientists, Analysts, and Technical Product Managers, who all share a genuine passion for harnessing data to improve people's lives. And we're in a unique position where we can actually help many different kinds of people, from our customers to our colleagues in store and in our support centre. Deepak (He / Him) | Data Scientist Read full storyEnd of quote slider carousel Make Your Mark Upcoming projects

Take part in our M&S Digital & Tech team days. Grow your digital and data skills through our BEAM Academy. Or challenge yourself at one of our business-wide hackathons. We also partner with Women in Data, Databricks and Cajigo to increase opportunities for women in digital and data. Opportunities to be heard

Your voice and your ideas matter here. Our 8 colleague networks are places to find support, listen to each other and encourage debate. You can pitch ideas 'Straight to Stuart', our CEO, or get involved in our BIG (Business involvement Group). Colleague Networks

We want you to feel supported, no matter what. Forces Community Network

Supporting colleagues connected to the Armed Forces, aiding their transition to civilian life, and ensuring that they thrive in the workplace. Culture and Heritage Network

Raising awareness of various religions and cultures through events and comms, to educate others and better represent our M&S colleagues and customers. Cancer Network

Fostering a supportive and inclusive workplace culture, addressing stigma, providing guidance and raising awareness to empower and assist colleagues affected by cancer. Family & Carers Network

A support network for parents and carers, offering a space for colleagues to share experiences, exchange ideas, and access useful resources. Health and Wellbeing Network

Providing a safe space for colleagues with all types of health conditions or disabilities and supporting with business initiatives to ensure our stores are truly accessible for our customers. Menopause Network

Initiating and encouraging open conversations about menopause by offering support and sharing experiences. LGBTQ+ Network

Proactively representing LGBTQ+ issues and opportunities to deliver a truly inclusive place to work and shop for our colleagues and customers. Gender Equality Network

Addressing gender-related challenges, raising awareness, and driving action to ensure equal opportunities for all. Forces Community Network

Supporting colleagues connected to the Armed Forces, aiding their transition to civilian life, and ensuring that they thrive in the workplace. Culture and Heritage Network

Raising awareness of various religions and cultures through events and comms, to educate others and better represent our M&S colleagues and customers. Cancer Network

Fostering a supportive and inclusive workplace culture, addressing stigma, providing guidance and raising awareness to empower and assist colleagues affected by cancer. Family & Carers Network

A support network for parents and carers, offering a space for colleagues to share experiences, exchange ideas, and access useful resources. Health and Wellbeing Network

Providing a safe space for colleagues with all types of health conditions or disabilities and supporting with business initiatives to ensure our stores are truly accessible for our customers. Menopause Network

Initiating and encouraging open conversations about menopause by offering support and sharing experiences. LGBTQ+ Network

Proactively representing LGBTQ+ issues and opportunities to deliver a truly inclusive place to work and shop for our colleagues and customers. Gender Equality Network

Addressing gender-related challenges, raising awareness, and driving action to ensure equal opportunities for all. Forces Community Network

Supporting colleagues connected to the Armed Forces, aiding their transition to civilian life, and ensuring that they thrive in the workplace. Culture and Heritage Network

Raising awareness of various religions and cultures through events and comms, to educate others and better represent our M&S colleagues and customers. Cancer Network

Fostering a supportive and inclusive workplace culture, addressing stigma, providing guidance and raising awareness to empower and assist colleagues affected by cancer. Family & Carers Network

A support network for parents and carers, offering a space for colleagues to share experiences, exchange ideas, and access useful resources. Health and Wellbeing Network

Providing a safe space for colleagues with all types of health conditions or disabilities and supporting with business initiatives to ensure our stores are truly accessible for our customers. Menopause Network

Initiating and encouraging open conversations about menopause by offering support and sharing experiences. LGBTQ+ Network

Proactively representing LGBTQ+ issues and opportunities to deliver a truly inclusive place to work and shop for our colleagues and customers. Gender Equality Network

Addressing gender-related challenges, raising awareness, and driving action to ensure equal opportunities for all. End of slider Colleague Networks carousel Benefits Wellbeing hub

Get access to resources to support your wellbeing, including a free virtual GP service.

• Wellbeing hub

• Wellbeing hub Get access to resources to support your wellbeing, including a free virtual GP service.

• Giving back

• Giving back Support your favourite charities by donating through your pay or even volunteering for them.

• Pay

• Technical: Strong hands-on experience and expertise in the Python data science ecosystem. Experience with distributed computing frameworks like Apache Spark (PySpark) or similar is preferred
• Data Science/ML: Strong experience in exploratory data analysis, machine learning algorithms, statistical inference, and experimental design, with desirable experience in optimisation techniques (e.g., linear/non-linear programming, or heuristics)
• Ownership : Proven track record of successfully leading and shipping end-to-end data science products with measurable business value in a production environment
• Communication Skills: Strong ability to communicate complex technical concepts and findings into clear, actionable insights for both technical and non-technical audiences
• Software Engineering : Good understanding of software engineering fundamentals, including version control, modular design, testing, and CI/CD, applied to the delivery of clean, scalable, and maintainable code

Team Digital & Tech Store London Support Office Location London, Greater London Contract type Permanent Position type Full Time Salary Competitive + Benefits Closing date: 30th April 2026

• Intro

• About the role

• Meet the Team

• People Stories

• Make Your Mark

• Colleague Networks

• Benefits, Here are some of the benefits we offer that make working for M&S just that little bit more special…

• After completing your probationary period, you'll receive 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., Earn a competitive salary.

• Colleague discount

• Colleague discount After completing your probation period, you'll receive 20% colleague discount across all M&S products and many of our third-party brands for you and a member of your household. Please note only contracts of more than 12 weeks are eligible for this benefit.

• Time off

• Time off Competitive holiday entitlement with the potential to buy extra holiday days.

• Bonus

• Bonus We have discretionary bonus schemes depending on your role and our business performance.

• Life assurance

• Life assurance Get cover for twice your salary up to age 70 (double with our Pension Plan).

• Workplace savings

• Workplace savings We'll help you save through our Pension Savings Plan, Share Buy and Sharesave schemes.

• My Choices

• My Choices Save on everyday costs through discounts and offers and get access to great health benefits.

• Cycle to work

• Cycle to work Bike/accessory hire with Cycle to Work and save on tax and national insurance.

• Smart tech

• Smart tech Buy the latest technology with interest-free financing directly from your salary.

• Family friendly policy

• Family friendly policy Industry-leading maternity, paternity, adoption and neo-natal policies, providing support and flexibility for you and your family.

• Wellbeing hub

• Giving back

• Pay

• Colleague discount

• Time off

• Bonus

• Life assurance

• Workplace savings

• My Choices

• Cycle to work

• Smart tech

• Family friendly policy

Being a part of M&S is exactly that - playing your part to bring the magic of M&S to our customers every day. We're an inclusive, dynamic, exciting, and ever evolving business built on doing the right thing and bringing exceptional quality, value, service to every customer, whenever, wherever and however they want to shop with us., We are ambitious about the future of retail. We're disrupting, innovating and leading the industry into a more conscientious, inspiring digital era. We're transforming how we work together and offering our most exciting opportunities yet. Marks & Spencer strives to be an inclusive organisation, trusted and admired by our colleagues, customers and suppliers. Join us and make change happen. We are committed to building diverse and representative teams, where everyone can bring their whole selves to work and be at their best. We support each other and work together to win together. If you feel you'd benefit from any support or reasonable adjustments during any stage of the recruitment process, please don't hesitate to let us know when completing your application. This information will be picked up by our team, so we can try and put steps in place to help you be at your best through this process. #hybridrole #LI-Hybrid #LI-HB1 Meet the Team Being an in-person business We're at our best when we're close to customers, and for many of us at M&S, that means working in store every day. To stay close to customers, our support teams are in the office three days a week as we believe that skills are developed through collaboration, and that spending time together makes us more creative and connected. It also means we can solve problems as soon as they arise, learn and grow as a team, build trust, and get closer to our colleagues. JanakHalfordDeepakJanakHalfordDeepakJanakHalfordDeepak I think all engineers just love solving puzzles and problems. At M&S, we're constantly learning new things, whether it's mastering Swift UI or understanding how customers interact with technology. But this is also a business that listens to engineers and values what we bring to the table. That's different, believe me. Janak (He / Him) | Staff iOS Engineer Read full story Being in third-party brands, working on things M&S hasn't done before… that plays to my sweet spot. I've worked in many organisations throughout my career, and it's rare to see such cause and effect in your work. The way we're structured means you're encouraged to solve problems and you have the autonomy to make progress quickly. Halford (He / Him) | Head of Technical Program Management Read full story At M&S, we have Data Scientists, Analysts, and Technical Product Managers, who all share a genuine passion for harnessing data to improve people's lives. And we're in a unique position where we can actually help many different kinds of people, from our customers to our colleagues in store and in our support centre. Deepak (He / Him) | Data Scientist Read full story I think all engineers just love solving puzzles and problems. At M&S, we're constantly learning new things, whether it's mastering Swift UI or understanding how customers interact with technology. But this is also a business that listens to engineers and values what we bring to the table. That's different, believe me. Janak (He / Him) | Staff iOS Engineer Read full story Being in third-party brands, working on things M&S hasn't done before… that plays to my sweet spot. I've worked in many organisations throughout my career, and it's rare to see such cause and effect in your work. The way we're structured means you're encouraged to solve problems and you have the autonomy to make progress quickly. Halford (He / Him) | Head of Technical Program Management Read full story At M&S, we have Data Scientists, Analysts, and Technical Product Managers, who all share a genuine passion for harnessing data to improve people's lives. And we're in a unique position where we can actually help many different kinds of people, from our customers to our colleagues in store and in our support centre. Deepak (He / Him) | Data Scientist Read full story I think all engineers just love solving puzzles and problems. At M&S, we're constantly learning new things, whether it's mastering Swift UI or understanding how customers interact with technology. But this is also a business that listens to engineers and values what we bring to the table. That's different, believe me. Janak (He / Him) | Staff iOS Engineer Read full story Being in third-party brands, working on things M&S hasn't done before… that plays to my sweet spot. I've worked in many organisations throughout my career, and it's rare to see such cause and effect in your work. The way we're structured means you're encouraged to solve problems and you have the autonomy to make progress quickly. Halford (He / Him) | Head of Technical Program Management Read full story