Senior UX/UI Designer (CRO) - Contract

Who We Are

WPP Enterprise Solutions designs, builds, and operates the growth systems that competitive businesses rely on. In a world where Al is reshaping how companies drive growth, we lead clients in business transformation and marketing modernization, connecting strategy directly to execution. Our 12,000 experts in engineering and platforms, commerce, consulting, content transformation, CRM, and CX work within a unified global operating unit across 40+ markets.

WPP Enterprise Solutions works alongside best-in-class partners including Adobe, AWS, Braze, Google, Microsoft, Salesforce, and Shopify, as well as innovators in AI, to deliver growth solutions tailored to the needs of our clients’ businesses. VML, part of WPP, supports WPP Enterprise Solutions by helping brands activate transformation through creativity and experience. Senior UX/UI or Product Designer (70% UI / 30% UX) with a specialized focus on Conversion Rate Optimisation (CRO) and experimentation to join our dynamic, flexible team, embedded directly within our dedicated CRO squad.

The opportunity: We are seeking a highly skilled and passionate UX/UI or Product Designer with a specialized focus on Conversion Rate Optimisation (CRO) and experimentation to join our dynamic, flexible team, embedded directly within our dedicated CRO squad. This hybrid role is for a hands-on designer who excels at crafting, optimizing, and delivering high-performing digital experiences across desktop and mobile. You will design premium web experiences and landing pages that drive user engagement, maximize conversions, and seamlessly support business growth.

You will be instrumental in translating user data, behaviour analytics, and strategic hypotheses into high-impact design variations and optimized user journeys. Working collaboratively within a cross-functional CRO squad, you will be responsible for the end-to-end design lifecycle of A/B and multivariate tests, ensuring every design is both meticulously executed and strategically optimized for maximum performance. What you’ll be doing: You are a hands-on, highly motivated, and self-sufficient UX/UI or Product Designer with deep expertise in conversion-centered design principles, web/mobile usability, and data-driven Optimisation.

Your passion for user-centric design pushes you to create intuitive, efficient, and visually stunning digital experiences that perform. Conversion-Centered Design Execution: Lead the end-to-end UX/UI design process for A/B testing, multivariate testing, landing pages, and ongoing Optimisation initiatives across web and mobile platforms. Develop detailed user flows, interaction models, wireframes, and interactive, high-fidelity prototypes specifically optimized for experimentation and user validation.

Create pixel-perfect UI designs that respect and elevate our clients' brand guidelines, utilizing persuasive design patterns, psychological triggers, and clear, conversion-focused hierarchies. Work with and support tokenized design systems (DS) , ensuring scalability, efficiency, and consistency of components across a multi-brand environment. Design and optimize unique, tailored user journeys for our client's portfolio of sub-brands , ensuring sub-brand visual identities and unique experiences are maintained while adhering to core design system architectures.

Focus on landing page layouts , micro-interactions, persuasive copywriting placement, and checkout/signup funnel Optimisation to systematically minimize friction. Translate user feedback, testing data, and statistical results from A/B tests into actionable, iterative design recommendations. Ensure all experiment designs are technically feasible and collaborate closely with developers during implementation, providing detailed specifications and reviewing builds to ensure high-fidelity execution of tests.