Experimentation Engineer

This role requires on-site presence at Asda House in Leeds three days per week. We’re really looking forward to having you around!

Building and running experiments that improve customer experience and performance. This is a hands-on role where you will turn ideas into live experiments, working in a small experimentation team with an optimisation manager, alongside product, design, and research, primarily supporting Asda Groceries.

You’ll focus on improving key customer journeys within Asda Groceries, helping to make the experience simpler, faster, and more effective for customers. You’ll collaborate closely with product, design, engineering, research, and business teams to test ideas, generate insight, and deliver measurable improvements.

At Asda, we serve millions of customers every week, online, in-app, and in-store. Alongside that, George is one of the UK’s leading fashion brands, blending style, quality and value. We’re on a mission to transform how customers shop, browse, and experience Asda and George digitally, and experimentation is central to how we improve both customer experience and commercial performance.

We’ve recently completed modernising our digital platforms, and our focus now is on improving the quality of the experience through test and learn. We’re building a strong experimentation capability to help us move faster, validate ideas, and deliver measurable improvements. If you’re motivated by solving problems, working at pace, and seeing your work drive real outcomes, this is your chance.

What you’ll do:

• Translate test plans into robust, production-ready experiments
• Build and run A/B and multivariate tests using experimentation platforms, ideally Dynamic Yield
• Ensure high-quality delivery through thorough QA across browsers and devices
• Apply a customer-first mindset while improving commercial performance
• Work closely with technical and non-technical stakeholders to bring experiments to life
• Collaborate with design and product teams to align experimentation with customer experience goals
• Analyse results and identify clear next steps to drive continuous improvement
• Contribute to improving experimentation standards, processes, and ways of working

What You’ll Bring:

• Experience in online experimentation, strong interest in test-and-learn approaches
• Experience with experimentation platforms such as Dynamic Yield, Optimizely, Monetate, or similar
• Strong front-end skills in HTML, CSS, and JavaScript
• Ability to implement and validate changes in live environments
• Strong attention to detail and a disciplined approach to QA
• Comfortable working with both technical and non-technical stakeholders
• Ability to interpret experiment results and translate them into clear recommendations
• Proactive and adaptable, comfortable taking ownership and working across different problems without close direction

This position is open to flexible working / job share / part-time working.

To ensure we balance moments where we know we need to collaborate together and the need for flexibility, Asda has a hybrid way of working with a minimum 3 days a week in one of our Home Offices. Over and above this, each area of Asda may have additional requirements which may require spending more days in the office, visiting suppliers, stores or depots.

You will also get an excellent benefits package including:

• Discretionary company bonus
• Company pension up to 7% matched
• 15% colleague discount in store and online
• Free access to wellbeing services such as Stream, 24/7 virtual GP, counselling, health and dental cash plans and a 24/7 employee assistance helpline, alongside discounts across a range of services and activities, from airport parking, enhanced to theme parks and cinemas.
• Asda Allies Inclusion Networks – helping colleagues to make sure everybody is included and that our differences are recognised and celebrated
• Excellent parental leave policies, including maternity & adoption leave, paternity leave, shared parental leave, neonatal care leave, and support for those doing fertility treatments.

We want all colleagues to be able to bring their best and true selves to work, every day. Simply put, we want our colleagues to be Proud to be Asda and proud to be themselves.