Join a forward-thinking UK energy provider focused on sustainable solutions. We''re looking for a Senior Product Designer to shape and enhance key customer experiences across digital journeys, designing clear, intuitive, high-quality interactions across web and mobile that help customers complete important tasks with ease and confidence.

This is a senior, hands-on role for someone with strong end-to-end product design expertise who thrives in complex environments and can move quickly from defining problems to delivering polished solutions. The role is an initial six-month contract (with potential extension), full-time (37 hours/week), with a hybrid model (one day every two weeks in the London office).

• Own the design of customer-facing journeys from discovery through to final UI

• Translate complex service challenges into intuitive, accessible experiences

• Collaborate cross-functionally with product, research, content, engineering, and business teams

• Deliver interaction design, user flows, wireframes, and high-fidelity UI

• Influence product direction through problem framing, ideation, and prioritisation

• Balance customer needs with business and operational feasibility

• Use data, insights, and testing to continuously improve usability

• Ensure consistency across end-to-end journeys

• Contribute to and evolve design systems and patterns

• Champion accessible, inclusive, and consistent design standards

• Enable rapid iteration while maintaining high-quality design craft

• Extensive senior-level product design experience across complex digital products

• Strong portfolio covering both mobile apps and responsive web

• Proven ability to simplify complex or regulated journeys

• Expertise in UX, interaction design, and visual execution

• Skilled in journey mapping, flows, and information architecture

• Comfortable working in ambiguity and shaping solutions with cross-functional teams

• Data-informed approach using user research and usability testing

• Strong balance of pace, quality, and commercial priorities

• Excellent communication skills with the ability to explain design decisions clearly

• Self-starter who delivers impact quickly

• Utilities, energy, or similarly complex service-led industries

• Experience across account management, service tools, billing, payments, onboarding, loyalty, and self-service journeys

• Working within regulated environments with accessibility standards

• Experience contributing to or working within established design systems

Rullion celebrates and supports diversity and is committed to ensuring equal opportunities for both employees and applicants.