Senior UI Designer - Contract UK

📍 Job Overview

Job Title: Senior UI Designer - Contract UK

Company: VML/WPP Enterprise Solutions

Location: London, United Kingdom

Job Type: Contract

Category: Creative & Design / User Experience

Date Posted: 2026-08-20

Experience Level: Mid-Senior Level (5-10 years implied)

Remote Status: On-site

🚀 Role Summary

• Design pixel-perfect, responsive interfaces for high-profile clients, enhancing user experience and driving conversion rates through strategic UI design.

• Collaborate within a cross-functional CX team, including UX, UI, Service Design, Optimisation, and Consulting leads, to deliver integrated digital solutions.

• Leverage and contribute to design systems to ensure consistent, scalable visual identity across consumer-facing brands, particularly in the eCommerce landscape.

• Maintain a deep understanding of user-centered design best practices, conversion optimization principles, and accessibility standards to inform design decisions.

📝 Enhancement Note: While the title specifies "Contract," the description uses terms like "permanent Senior UI designer" and "career development." This suggests the role might be a long-term contract with potential for permanent conversion or a permanent position that was initially posted as a contract. The emphasis on "rapidly expanding CX team" and "growth systems" indicates a dynamic environment focused on digital transformation and client success.

📈 Primary Responsibilities

• Crafting the digital brand look and feel, translating brand strategy into compelling visual interfaces that resonate with target audiences.

• Designing responsive interfaces across various devices and platforms, ensuring a seamless and intuitive user journey.

• Applying user-centered design methodologies to create intuitive and engaging user experiences that align with client business objectives.

• Implementing conversion-led design strategies to optimize transactional websites and increase key performance indicators (KPIs) such as conversion rates and customer engagement.

• Working with and contributing to established design systems to maintain brand consistency and accelerate the design process for large-scale consumer-facing brands.

• Staying abreast of the latest advancements in design technology, tools, and industry trends to bring innovative solutions to client projects.

• Communicating design concepts, rationale, and solutions effectively to stakeholders, clients, and internal teams, confidently defending design decisions.

• Collaborating closely with UX consultants, product managers, developers, and other designers to ensure cohesive and high-quality end-to-end product delivery.

• Ensuring adherence to accessibility principles (e.g., WCAG) in all design outputs to create inclusive digital experiences.

📝 Enhancement Note: The role emphasizes a blend of creative execution and strategic thinking, focusing on conversion-driven design within a CX context. Responsibilities highlight a hands-on approach, requiring the ability to manage projects independently while also fostering strong collaboration within a multidisciplinary team.

🎓 Skills & Qualifications

Education: Bachelor's degree in Graphic Design, UI Design, or a related discipline.

Experience: A minimum of 5-10 years of professional UI design experience, with a strong focus on digital and eCommerce platforms.

Required Skills:

• Proven experience in UI design, with a strong portfolio showcasing high-quality online design, specifically within the eCommerce sector.

• Expertise in using design systems on large consumer-facing brands.

• Proficiency in industry-standard design tools: Figma, Sketch, and Adobe Creative Suite.

• Deep understanding of user-centered design principles and best practices.

• Solid grasp of conversion-led design strategies and their application to transactional websites.

• Knowledge of accessibility principles and their implementation in digital design.

• Exceptional eye for design, including typography, layout, and visual hierarchy.

• Ability to communicate design decisions clearly and persuasively to diverse audiences.

• Strong project management skills, with the ability to manage multiple projects simultaneously and deliver under tight deadlines.

• Excellent problem-solving abilities and a detail-oriented approach.

• A strong work ethic, self-motivation, and enthusiasm for technology and web-based applications. Preferred Skills:

• Experience with design tokens.

• Familiarity with animation tools such as Adobe After Effects and Final Cut Pro for enhanced visual storytelling or prototyping.

• Experience working within a digital or creative agency environment or an in-house design studio.

📝 Enhancement Note: The "Bonus points" section strongly implies that experience with design tokens and animation software are highly valued, suggesting an interest in more advanced UI/UX capabilities. The requirement for a "compelling portfolio" is paramount, indicating it will be a primary evaluation tool.

📊 Process & Systems Portfolio Requirements

Portfolio Essentials:

• A compelling portfolio demonstrating high-quality online design, with a specific emphasis on successful eCommerce projects.

• Case studies that clearly articulate the design process, challenges faced, solutions implemented, and measurable outcomes (e.g., increased conversion rates, improved user satisfaction).

• Examples of work created using or contributing to design systems, showcasing scalability and consistency.

• Demonstrations of responsive design across various screen sizes and devices.

• Evidence of applying user-centered design principles and conversion optimization strategies. Process Documentation:

• Showcase an understanding of the end-to-end design process, from initial concept and user research to final implementation and iteration.

• Illustrate how you translate business requirements and user needs into effective UI designs.

• Provide examples of how you collaborate with cross-functional teams (UX, development, product management) throughout the design lifecycle.

• Detail your approach to gathering feedback and iterating on designs based on stakeholder input and user testing.

📝 Enhancement Note: The portfolio is expected to be the primary evidence of a candidate's capabilities, particularly in demonstrating impact on conversion and user experience within an eCommerce context. Candidates should be prepared to walk through their portfolio and discuss specific design decisions and their rationale.

💵 Compensation & Benefits

Salary Range: As this is a contract role in London, UK, and for a Senior UI Designer with 5-10 years of experience, the estimated salary range is £50,000 - £80,000 per annum, depending on experience, the specific contract duration, and the extent of responsibilities.

Benefits:

• Opportunity to work with globally recognized and exciting brands.

• Prioritized career development and skill growth opportunities.

• Empowerment to make a significant impact on client projects.

• A culture that values individuality and respects personal contributions.

• Potential for future career progression within VML/WPP Enterprise Solutions.

Working Hours: 40 hours per week, typical for a full-time contract role. While the role is on-site, flexibility may be discussed based on project needs and team collaboration.

📝 Enhancement Note: The salary estimate is based on industry benchmarks for Senior UI Designers in London for contract positions, considering the specified experience level and the agency environment. Benefits are primarily focused on professional growth and project exposure, common for contract roles within large agencies.

🎯 Team & Company Context

🏢 Company Culture

Industry: Marketing and Advertising, Digital Transformation, Enterprise Solutions, Consulting. VML/WPP Enterprise Solutions operates at the intersection of technology, creativity, and business strategy, helping clients build and operate growth systems.

Company Size: Part of WPP, a global network of agencies. WPP Enterprise Solutions itself comprises over 12,000 experts globally. This scale offers opportunities for diverse project exposure and collaboration with a vast network of specialists.

Founded: WPP was founded in 1982. VML merged with Wunderman to form Wunderman Thompson in 2018, and later rebranded as VML in 2024, integrating with WPP's Enterprise Solutions arm. This history signifies a long-standing presence and evolution in the advertising and marketing industry.

Team Structure:

• The role is within a rapidly expanding CX team, working alongside Leads in UX, UI, Service Design, Optimisation, and Consulting.

• This indicates a highly collaborative, multidisciplinary team structure focused on delivering comprehensive customer experience solutions.

• The Senior UI Designer will report to a Design Lead or a CX Lead, with direct interaction with product managers and developers. Methodology:

• Focus on designing, building, and operating "growth systems" for clients, integrating strategy with execution.

• Emphasis on business transformation and marketing modernization, leveraging AI and partnerships with leading technology providers (Adobe, AWS, Salesforce, etc.).

• A data-driven approach to design, aiming to improve user experience and increase conversion rates.

Company Website: https://www.vml.com/

📝 Enhancement Note: The company culture is shaped by WPP's global presence and VML's creative heritage, with a strong emphasis on innovation, collaboration, and client-centric solutions. The "Heart, Brains, Courage" values guide their approach to work and team dynamics.

📈 Career & Growth Analysis

Operations Career Level: Senior Individual Contributor within the Design discipline. This role is crucial for executing high-quality UI designs that directly impact client conversion and user experience. It's a hands-on role with leadership potential in design execution and mentorship.

Reporting Structure: The Senior UI Designer will likely report to a Design Lead or a CX Lead within the Enterprise Solutions division. They will collaborate closely with UX Leads, Product Managers, and Development teams, fostering a matrixed reporting environment for project execution.

Operations Impact: The UI Designer's work directly influences client conversion rates, customer engagement, and overall brand perception. By creating intuitive and effective interfaces for eCommerce platforms, they contribute directly to revenue generation and client success, aligning with the company's mission to build growth systems.

Growth Opportunities:

• Skill Advancement: Deepen expertise in eCommerce UI design, conversion optimization, and design systems. Opportunity to learn about new design tools, AI applications in design, and emerging design trends.

• Leadership Potential: Potential to mentor junior designers, lead design initiatives on specific projects, and contribute to the evolution of design processes and standards within the team.

• Cross-functional Exposure: Gain exposure to UX, Service Design, Consulting, and Development, broadening understanding of the full product lifecycle and CX strategy.

• Client Portfolio Growth: Work with a diverse range of leading global brands, expanding professional network and portfolio with high-impact projects.

📝 Enhancement Note: While the role is contract, the emphasis on career development and growth suggests VML/WPP Enterprise Solutions invests in its talent. Opportunities for skill enhancement and potential leadership are strong, especially within a large, dynamic organization.

🌐 Work Environment

Office Type: On-site role in London, UK. This suggests a collaborative office environment where in-person interaction, brainstorming, and team synergy are valued.

Office Location(s): London, United Kingdom. This provides access to a major business hub with excellent transport links and a vibrant professional community.

Workspace Context:

• A fast-paced, ever-moving environment within a creative agency setting.

• Expect a collaborative workspace where designers work closely with UX, product managers, and developers.

• Access to modern design tools and technology is expected.

• The environment likely encourages innovation, experimentation, and continuous learning.

Work Schedule: Standard full-time hours (approx. 40 hours/week) are anticipated for this contract position. While on-site, the agency environment may offer some flexibility depending on project demands and team agreements.

📝 Enhancement Note: The "fast-paced, ever-moving environment" description points to a dynamic agency culture that requires adaptability and efficiency. The on-site nature emphasizes the importance of in-person collaboration and team cohesion.

📄 Application & Portfolio Review Process

Interview Process:

• Initial Screening: A review of your resume and portfolio to assess suitability for the role and alignment with required skills.

• Portfolio Presentation: A dedicated session where you will present your portfolio, discussing key projects, design process, challenges, and outcomes. Be prepared to articulate your role and impact.

• Skills Assessment: Potential for a design challenge or case study to evaluate your problem-solving abilities, design thinking, and proficiency with tools like Figma or Sketch.

• Team/Stakeholder Interviews: Meetings with design leads, UX consultants, product managers, and potentially other team members to assess cultural fit, collaboration style, and communication skills.

• Final Interview: Likely with a senior leader to discuss overall fit, career aspirations, and confirm expectations.

Portfolio Review Tips:

• Curate Strategically: Select 3-5 of your strongest projects that best showcase your UI design skills, particularly in eCommerce and conversion-led design.

• Tell a Story: For each project, clearly outline the problem, your approach, the tools/processes used, your specific contributions, and the measurable results achieved.

• Highlight Impact: Quantify your achievements whenever possible (e.g., "increased conversion by 15%," "reduced user error rate by 10%").

• Showcase Process: Demonstrate your understanding of user-centered design, wireframing, prototyping, and iteration.

• Emphasize Collaboration: Discuss how you worked with cross-functional teams and stakeholders.

• Design Systems & Accessibility: If applicable, showcase your experience with design systems and how you've incorporated accessibility principles.

Challenge Preparation:

• Familiarize yourself with common UI design challenges for eCommerce and transactional websites.

• Practice articulating your design decisions concisely and justifying them based on user needs and business goals.

• Be prepared to work through a problem-solving exercise, sketching out ideas and explaining your thought process.

• Understand the company's core values (Heart, Brains, Courage) and how your approach aligns with them.

📝 Enhancement Note: The interview process will heavily rely on evaluating your portfolio and your ability to articulate your design process and its impact. Be ready to discuss specific design choices and their rationale, especially concerning conversion optimization and user experience.

🛠 Tools & Technology Stack

Primary Tools:

• Figma: Essential for UI design, prototyping, and collaboration. Expected proficiency for creating responsive interfaces and working with design systems.

• Sketch: Another key design tool, often used for UI design and prototyping. Familiarity with Sketch alongside Figma is beneficial.

• Adobe Creative Suite: Proficiency in tools like Photoshop and Illustrator for image editing, asset creation, and general graphic design tasks.

Analytics & Reporting:

• While not explicitly listed as a primary tool for the UI Designer, understanding how to interpret analytics and user feedback (e.g., heatmaps, user session recordings, A/B test results) to inform design decisions is crucial. Familiarity with tools like Google Analytics, Hotjar, or similar platforms would be advantageous. CRM & Automation:

• The role operates within WPP Enterprise Solutions, which focuses on growth systems. While the UI Designer may not directly manage CRM or automation platforms, an understanding of how UI design integrates with these systems (e.g., user journeys within a CRM workflow) is beneficial. Other Potential Tools:

• Prototyping Tools: InVision, Adobe XD (though Figma and Sketch are primary).

• Collaboration Tools: Slack, Microsoft Teams, Jira, Confluence.

• Design System Management Tools: Zeplin, Abstract.

📝 Enhancement Note: Proficiency in Figma and Sketch is non-negotiable. The role requires a strong foundation in core UI design tools, with an understanding of how these tools integrate into broader digital transformation and CX initiatives. Experience with design tokens is a preferred skill, indicating a forward-thinking approach to design system implementation.

👥 Team Culture & Values

Operations Values:

• Heart: Fostering empathy and trust to build genuine connections and human-centric work. For a UI Designer, this translates to designing with deep consideration for the user's needs and emotional response.

• Brains: Valuing relentless curiosity and collaborative intelligence to solve complex challenges. This means approaching design problems with a thoughtful, analytical mindset and seeking innovative solutions through teamwork.

• Courage: Inspiring boldness in speaking up, embracing experimentation, and advocating for impactful solutions. UI Designers are expected to confidently present their ideas, challenge conventions when necessary, and push for high-quality, effective designs.

Collaboration Style:

• Cross-functional Integration: Close collaboration with UX, Service Design, Product Management, and Development is fundamental to the role. This involves active participation in team meetings, workshops, and design reviews.

• User-Centricity: A shared commitment to user needs and business objectives, ensuring that all design decisions are grounded in research and aligned with strategic goals.

• Feedback-Driven: An environment where constructive feedback is encouraged and utilized for continuous improvement of designs and processes.

• Agile Mindset: Working within a fast-paced, iterative environment, adapting to changes and delivering solutions efficiently.

📝 Enhancement Note: The company's core values (Heart, Brains, Courage) are central to its culture and should be reflected in how candidates approach their work and interactions. Demonstrating empathy, intellectual curiosity, and the confidence to advocate for strong design will be key.

⚡ Challenges & Growth Opportunities

Challenges:

• Balancing User Needs with Business Goals: Effectively translating client business objectives and conversion targets into user-friendly and aesthetically pleasing interfaces.

• Fast-Paced Agency Environment: Adapting to tight deadlines, evolving project scopes, and the need for rapid iteration in a client-facing role.

• Maintaining Consistency Across Brands: Ensuring brand integrity and a cohesive user experience when working on multiple large-scale consumer-facing brands with diverse visual identities.

• Staying Current with Technology: Keeping pace with rapid advancements in AI, design tools, and digital trends to maintain a competitive edge and offer innovative solutions.

Learning & Development Opportunities:

• Advanced UI/UX Techniques: Opportunities to deepen expertise in conversion optimization, accessibility, micro-interactions, and advanced prototyping.

• Design Systems Expertise: Contributing to and learning from sophisticated design systems, potentially exploring design tokens and their implementation.

• Industry Exposure: Working with a diverse portfolio of leading global brands, gaining insights into various market sectors and their unique design challenges.

• Mentorship and Collaboration: Learning from experienced leads in UX, Service Design, and Consulting, and potentially mentoring junior designers.

• Continuous Learning: Access to WPP's resources, industry events, and internal training programs to stay updated on the latest design trends and technologies.

📝 Enhancement Note: The challenges presented are typical for senior roles in agency environments, emphasizing problem-solving and adaptability. The growth opportunities are significant, particularly for those looking to expand their expertise in high-demand areas like conversion design and design systems.

💡 Interview Preparation

Strategy Questions:

• "Describe a time you designed an interface that significantly increased conversion rates. What was your process, and what were the key design elements that contributed to its success?" (Focus on process, metrics, and specific design choices).

• "How do you approach balancing user needs with demanding business objectives and tight deadlines in a fast-paced agency environment?" (Highlight your problem-solving, prioritization, and communication skills).

• "Walk us through your experience with design systems. How have you used them to ensure consistency and scalability, and what are your thoughts on design tokens?" (Demonstrate practical application and forward-thinking knowledge). Company & Culture Questions:

• "What do you know about VML/WPP Enterprise Solutions and our approach to building growth systems for clients?" (Show you've researched the company and understand its mission).

• "How do you embody our core values of Heart, Brains, and Courage in your design work and team interactions?" (Connect your personal work ethic and approach to their stated values).

• "How do you ensure inclusivity and accessibility in your UI designs?" (Demonstrate your commitment to user-centered and ethical design practices). Portfolio Presentation Strategy:

• Structure is Key: Organize your presentation logically, starting with an overview of your role and the project's objective.

• Visuals First: Use high-quality mockups, prototypes, and user flows to illustrate your work.

• Narrate Your Process: Explain why you made certain design decisions, referencing user research, business goals, and design principles.

• Quantify Impact: Be ready to discuss metrics and the tangible results of your designs.

• Handle Questions Gracefully: Listen carefully to questions, take a moment to consider your answer, and respond thoughtfully. Don't be afraid to say you'd need more information to give a definitive answer, but always try to provide a reasoned approach.

• Showcase Collaboration: Mention how you worked with other team members and stakeholders.

📝 Enhancement Note: Prepare to not only show your design work but also to articulate the strategic thinking, problem-solving, and collaborative efforts behind it. The interview will assess your technical skills, process, and cultural fit.

📌 Application Steps

To apply for this Senior UI Designer contract position:

• Submit your application through the provided link on Greenhouse.

• Curate Your Portfolio: Ensure your portfolio prominently features your strongest UI design work, with a clear emphasis on eCommerce projects and demonstrated impact on conversion and user experience.

• Tailor Your Resume: Highlight relevant experience in UI design, specific tools (Figma, Sketch, Adobe Creative Suite), design systems, user-centered design, and conversion-led strategies. Quantify achievements where possible.

• Prepare Your Narrative: Practice walking through your portfolio projects, explaining your design process, challenges, solutions, and outcomes. Be ready to discuss your role and contributions in detail.

• Research the Company: Familiarize yourself with VML/WPP Enterprise Solutions, their mission, clients, and core values (Heart, Brains, Courage). Understand their focus on growth systems and digital transformation.

⚠️ Important Notice: This enhanced job description includes AI-generated insights and operations industry-standard assumptions. All details should be verified directly with the hiring organization before making application decisions.