Conversion Rate Optimisation Assistant Manager
Team
Digital \& Tech
Store
London Support Office
Location
London, Greater London
Contract type
Permanent
Position type
Full Time
Salary
Competitive \+ Benefits
Closing date: 4th June 2026
- Intro
- About the role
- Meet the Team
- People Stories
- Make Your Mark
- Colleague Networks
- Benefits
- How to Apply
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Everyone is welcome at M\&S. No exceptions. It’s your background, abilities and differences that make you, uniquely you. And when you’re part of M\&S, that individuality has the potential to make waves.
About the role
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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.
All the details
What's in it for you?
Working at M\&S means being part of something bigger \- helping to deliver quality, value and service to millions of customers every day. We’re inclusive, fast\-moving and always evolving, with a strong sense of purpose and a focus on doing the right thing.
Here are just a few of the benefits that make working here even more rewarding:
- 20% colleague discount on all M\&S products and many third\-party brands for you and someone in your household, available once you’ve completed your probation
- Competitive holiday allowance with the option to buy more
- Discretionary bonus schemes linked to your performance and ours
- Strong pension and life assurance to help plan for the future
- Tailored induction and training to support your development from day one
- Exclusive perks and savings through our M\&S Choices portal
- Market\-leading family policies, including parental, adoption and neonatal leave
- 24/7 wellbeing support, including virtual GP access and mental health services
- One paid volunteer day a year to support a cause that matters to you
To support in delivering measurable improvements through conversion rate optimisation in the customer journey through experimentation. This role owns the day‑to‑day planning and execution of experiments, supports analysis and reporting, and builds strong foundations in experimentation, UX optimisation, and data‑led decision making.
- Identify optimisation opportunities across websites, apps, landing pages, and funnels
- Support in delivering the CRO roadmap aligned to business and incremental revenue objectives
- Maintain testing best practices and QA standards \& develop clear hypotheses grounded in qualitative and quantitative insights
- Take findings from experiments and turn into actionable recommendations to support category growth or digital best practices
- Communicate test plans, results, and learnings clearly to stakeholders.
- Driving a test \& learn roadmap using customer insight and onsite data to focus on optimisation across these areas and digital channels.
- Working with the data insights team, product development, trading, UX \& UI and analytics teams to identify new opportunities.
- Working with third party providers to build and drive a roadmap that looks to improve and optimise the onsite experience and delivering value.
- Use industry data sources to drive and prioritise changes within M\&S.com.
- Ability to analyse and report information.
- Experience in CRO/experimentation or digital optimisation.
- Strong organisational skills.
- Ability to create relationships with other members of M\&S.com and the wider business.
- Adobe Analytics, Content Square or other web analytics tools.
- Ability to form strong hypotheses and challenge assumptions with data.
- Experience with Optimizley or other A/B testing platforms.
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.\#LI\-CA1
Meet the Team
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Being an in\-person business
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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.
Halford
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Janak
Deepak
Halford
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Janak
Deepak
Halford
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Janak
Deepak
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
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
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
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
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
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
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
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
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
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Make Your Mark
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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
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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.
LGBTQ\+ Network
Proactively representing LGBTQ\+ issues and opportunities to deliver a truly inclusive place to work and shop for our colleagues and customers.
Family \& Carers Network
A support network for parent
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