UX/UI Designer

Senior UX/UI Designer

Location: London | Hybrid – 2–3 days per week in the office

The Role

We’re looking for a strategic, technically proficient and data-informed Senior UX/UI Designer to join a growing digital UX/UI team within a leading international e-commerce business.

You’ll be responsible for delivering research-led UX/UI solutions that directly support commercial objectives across customer acquisition, conversion and retention .

The role will involve defining and optimising user journeys across multiple brands, websites and European markets. You’ll improve existing digital experiences through continuous experimentation and A/B testing , while also helping shape new features aligned with wider business and technology roadmaps.

Working closely with front-end and back-end developers, Product Owners, Analysts and Research teams, you’ll operate within Agile sprint cycles to deliver iterative solutions grounded in user insight, data and performance.

A strong understanding of Next.js, HTML, CSS and scalable design frameworks is important to ensure designs translate effectively into front-end delivery.

Key Responsibilities

• Design, prototype and validate optimised user journeys across multiple brands and markets.
• Lead A/B testing initiatives using research, analytics and performance data to continuously improve digital experiences.
• Champion UX best practice throughout the digital product lifecycle.
• Work closely with Business, Technology and Content teams to translate requirements into actionable design work.
• Coordinate cross-functional delivery, identifying risks and blockers and helping keep projects on track.
• Collaborate closely with developers and Product teams within Agile sprint environments.
• Provide UX expertise and testing support across CMS and wider platform migrations.
• Maintain and develop scalable UX and design frameworks that improve consistency and efficiency.
• Produce high-quality low- and high-fidelity prototypes using Figma , with responsive design and accessibility embedded from the outset.
• Use AI-enabled tools to accelerate research, ideation and wireframe validation.
• Translate customer and market insight into design decisions that improve conversion, engagement and revenue.
• Ensure accessibility, localisation and cross-market usability are considered across all design outputs.

What We’re Looking For

• 4–6+ years’ UX experience , ideally with a strong commercially focused e-commerce portfolio .
• Proven experience improving customer journeys and commercial KPIs such as conversion rate, Average Order Value (AOV) and Customer Acquisition Cost (CAC) .
• Experience working across fast-paced, multi-brand or multi-market digital environments.
• Expert knowledge of user-centred design methodologies and tools including Figma, Hotjar and GA4 .
• Comfortable working within Agile/sprint-based environments using tools such as Jira, ClickUp or Asana .
• Strong understanding of experimentation, research and data-led design.
• Excellent time management and the ability to manage several projects simultaneously.
• Confident working closely with developers, Product teams, Researchers and senior stakeholders.
• Commercially minded, able to balance creative ideas with technical feasibility and measurable business impact.
• Strong attention to detail and a structured approach to design delivery.
• Clear and confident communication skills.
• Proactive, adaptable and comfortable operating within a fast-moving environment.