Senior Product Designer in Hampshire

Once For All is a high-growth, cloud-based, SaaS subscription business. Our technology helps our customers to manage their supply chain governance, risk management and compliance. We work across public and private sector and have over 250k customers across the UK across 20 different sectors including construction, transport, retail, hospitality education, facility and property management, manufacturing, local and central government.

Role Summary

We’re looking for a Senior Product Designer to help shape the future of the Once For All platform. You will be part of a small, cross-functional product team (Design, Frontend, Backend, QA, Product) working together to deliver meaningful product outcomes, not just design outputs. This is not a traditional handoff model—design and engineering collaborate closely throughout. You’ll be working in a fast-moving environment where problems may not always be fully defined upfront, and comfort with ambiguity is essential. You will play a key role in bridging design and engineering—defining behaviour, logic, and edge cases, and working alongside engineers to bring solutions to life. We are evolving toward a design-to-build way of working, where design takes ideas further toward real product outcomes—without replacing engineering ownership.

Job Responsibilities

• Lead end-to-end product design as part of a cross-functional team, from discovery through to delivery and iteration.
• Translate research and product insights into clear, scalable solutions across complex, multi-role workflows.
• Design with a systems-first mindset, defining components, states, behaviours, and edge cases—not just static screens.
• Work closely with engineers throughout the process, collaborating on implementation rather than handing off designs.
• Define interaction logic and product behaviour, ensuring solutions are clear, feasible, and ready to be built.
• Use AI-assisted workflows to explore, prototype, and iterate quickly—accelerating learning and improving product outcomes.
• Make thoughtful decisions about when AI adds value to the user experience, and when simpler approaches are more appropriate.
• Design AI-enhanced experiences where relevant (e.g. assisted workflows, automation, decision support), ensuring clarity and user control.
• Contribute to and help evolve our design system, and create clear flows and prototypes that communicate behaviour, interaction, and edge cases effectively.
• Support and mentor other designers through collaboration and feedback.

What We’re Looking For

• 7+ years of product design experience, with a strong focus on B2B SaaS platforms.
• A portfolio demonstrating complex workflows, systems thinking, and data-heavy or multi-role products.
• High proficiency in Figma (including variables, tokens, prototyping, and system-based design).
• Experience working within and contributing to design systems.
• Experience using AI to support design workflows, with an understanding of where it adds value and where it does not.
• Strong experience designing end-to-end experiences, with the ability to take work from concept through to build-ready solutions in close collaboration with engineering.
• Strong understanding of interaction design, states, edge cases, and responsive behaviour.
• Ability to communicate design intent clearly to both technical and non-technical stakeholders.
• Experience working in agile, cross-functional teams.
• Interest in, or experience designing, AI-powered or AI-assisted product experiences (e.g. recommendations, copilots, automation, or decision-support tools).

How Success is Measured

• Success in this role is measured by product outcomes, not just design output.
• Improving user efficiency and experience across complex workflows.
• Delivering solutions that are successfully implemented and adopted.
• Contributing to faster, more effective collaboration between design and engineering.
• Raising the overall quality and consistency of the product.

Nice to Have

• Experience designing for compliance, procurement, ESG, or marketplace platforms.
• Familiarity with Storybook or similar tools, and how design systems translate into code.
• Basic understanding of frontend technologies (HTML, CSS, React).
• Familiarity with modern AI‑assisted tools (e.g. Figma Make, Claude, or similar).
• Experience prototyping or experimenting with code-based or AI‑assisted solutions.
• Experience designing AI-native interfaces, including handling uncertainty, confidence, and human-in-the-loop interactions.
• Experience mentoring or supporting other designers.

Why Join Us?

• Help shape a modern SaaS design function evolving toward design-to-build workflows.
• Work in a collaborative environment where design and engineering are closely aligned.
• Opportunity to experiment with AI tools and new ways of building digital products.
• Flexible, remote-first working model with meaningful in-person collaboration.
• Competitive salary and the opportunity to have real impact at scale.

What we offer

• Wellness fund or Private Medical Insurance (dependent upon role)
• Pension
• Life Assurance x 3
• 25 days holiday plus 8 Bank Holidays
• Ongoing continual professional development (CPD)
• Holiday purchase Scheme up to 5 days
• 1 paid and 1 unpaid volunteering day
• 24/7 and 365 Days Employee Assistance Programme
• Team and company offsite events
• Specsavers eye care voucher
• Free Tea, Coffee and fruit every week – Basingstoke office