Once For All - Mobile App UX/UI Designer

UX Designer is needed in Basingstoke, United Kingdom.

Client: Once For All

Location: Basingstoke, United Kingdom

Contract: Contractor

Job Description

Once For All is a high-growth, cloud-based, SaaS subscription business that aids customers in managing their supply chain governance, risk management, and compliance. With over 250k customers across 20 different sectors in the UK, including construction, transport, retail, hospitality, education, facility and property management, manufacturing, and government, we are looking for a Mobile App UX/UI Designer for a 6-month contract role. The designer will lead the design and user experience of our upcoming marketplace app, collaborating closely with product managers, developers, and researchers to ensure a seamless, user-friendly mobile experience focused on mobile-first design, usability, and a clean interface that promotes engagement and conversion.

Job Responsibilities

• Design user-centered experiences for the marketplace mobile app from concept to high-fidelity UI.
• Develop wireframes, interactive prototypes, and user flows to illustrate design ideas.
• Ensure designs are mobile-first and optimized for iOS and Android platforms.
• Collaborate with user research teams to gather insights and refine designs based on feedback.
• Work within and contribute to Once For All’s design system, ensuring consistency across products.
• Partner with developers for smooth handoff and implementation of designs.
• Advocate for accessibility and best UX/UI practices in mobile design.

Requirements

• 5+ years of UX/UI design experience, with a focus on mobile apps.
• Strong portfolio showcasing marketplace, SaaS, or B2B mobile product designs.
• Proficiency in Figma, including components, variables, tokens, and prototyping.
• Experience in mobile-first and responsive design, adhering to iOS and Android UI guidelines.
• Knowledge of user testing, feedback loops, and data-driven design decisions.
• Familiarity with design handoff tools and collaboration with developers.
• Strong communication skills and ability to present design rationale effectively.

Nice to Have

• Experience designing for B2B marketplaces or procurement platforms.
• Understanding of motion design and micro-interactions for app engagement.
• Familiarity with construction industry software or compliance-related platforms.
• Knowledge of front-end development principles (HTML, CSS, React Native) for better collaboration.

Why Join Us?

• Work on a high-impact marketplace app for a leading SaaS platform in the construction industry.
• Fully remote and flexible freelance contract.
• Competitive rates with the opportunity to shape the mobile experience of a growing platform.
• Collaboration with a talented and passionate cross-functional team.