Job Title
UX Engineer - Experimentation & Optimisation
Location
Asda House
Employment Type
Full time
Contract Type
Permanent
Hours Per Week
37.5
Salary
Competitive salary plus benefits.
Category
User Experience Design
Closing Date
11 September 2025
Lets find your role
As an Experimentation & Optimisation Engineer, you will play a key role in enhancing the ecommerce experience by implementing and managing A/B tests, multivariate tests, and personalization experiments. Working within the UX, Research, and Conversion Rate Optimisation (CRO) team, you will collaborate with designers, other developers (internal and external to Asda), and analysts to test hypotheses, validate design improvements, and drive data-informed decisions that improve conversion rates and customer engagement.
You will:
Implement & Manage Experiments
Develop, deploy, and maintain A/B and multivariate tests across ecommerce platforms, ensuring robust and scalable execution. Work with experimentation platforms to set up, monitor, and analyse tests. Ensure experiments run efficiently, with proper randomization, targeting, and performance tracking.
Improve Conversion Rate Through Testing
Collaborate with the CRO Lead, UX and Content design, Research, and Product teams to identify testing opportunities that reduce friction and enhance the user journey.
Data-Driven Insights & Technical Optimisation
Collaborate with Data & Analytics, and UX Research to analyse user behaviour, to shape test hypotheses and identify blockers. Ensure test variations maintain site performance, SEO, and accessibility.
Cross-Functional Collaboration & Knowledge Sharing
Work closely with eComm teams as well as UX Designers and Product Managers to integrate testing into Agile workflows. Share insights, methodologies, and best practices to foster a culture of experimentation across the business. Ensure that all tests are aligned with business goals and customer needs.
Maintain Ethical, Compliant & Scalable Testing Practices
Ensure all experiments adhere to ethical standards, including data privacy regulations (e.g., GDPR, CCPA). Develop scalable testing processes that allow for rapid iteration without disrupting the user experience. Advocate for accessibility and inclusivity in all testing initiatives.
Lets find out about you
* Experimentation & A/B Testing: Experience with A/B testing tools, ensuring proper test setup and execution.
* Front-End Development: Strong proficiency in JavaScript, HTML, and CSS to implement and modify test variations.
* Performance & Site Optimization: Understanding of web performance metrics and techniques to improve performance and usability.
* Collaboration & Communication: Ability to work effectively with eComm Events, Monetisation and Trading teams as well as UX, Product, and Development teams, translating test insights into actionable recommendations.
* Agile & Iterative Mindset: Experience working in agile environments, running fast-paced experiments, and iterating based on results.
Everything you'll love
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 Wagestream, 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