Senior UI/UX Designer

ACCIONA is a global company, leading in the development of regenerative infrastructure that creates a positive impact on society. Our workforce consists of more than 41,500 professionals, present in more than 40 countries across the five continents, all contributing in our mission to design a better planet. Are you a passionate individual who wants to make a difference, promote sustainable development, and find solutions to the biggest global challenges, including climate change, overpopulation, and water scarcity? Come and join us in building the infrastructure our planet needs to achieve a sustainable future.

The Opportunity

The Senior UI/UX Designer plays a pivotal role in shaping, modernising, and elevating the user experience across Acciona's digital ecosystem-spanning both established platforms and new systems designed to support the organisation's growing operational and business needs.

This role leads the end‑to‑end design process, driving the UX vision, influencing product direction, and ensuring every digital solution-whether improving an existing tool or designing a completely new product-delivers intuitive, contemporary, and impactful experiences. You will help build Acciona's next generation of digital capability by championing user‑centred design, consistent UI standards, and seamless interactions across all touchpoints.

Key responsibilities:

• Lead the creation of high‑fidelity wireframes, prototypes, journey maps, UX flows, and interaction patterns for both legacy platforms and new product concepts.
• Collaborate with Business Analysts, Product Managers, and development teams to define product experiences aligned with user needs and strategic business goals.
• Drive and maintain a modernised design system, ensuring consistent UI patterns and interaction standards across all digital platforms.
• Validate design concepts through usability testing, user research, rapid prototyping, and iterative refinement.
• Oversee design quality during development, conducting design reviews and ensuring accurate implementation of UX/UI specifications.
• Provide strategic UX input into planning, prioritisation, sprint activities, and product roadmap development.
• Support the rollout, adoption, and user training for new features and digital products.
• Mentor designers and uplift design thinking, user‑centric practices, and experience‑led decision‑making across the organisation

About You:

• Expert capability in end‑to‑end UX/UI design, including wireframing, prototyping, interaction design, and creating user journeys for complex digital ecosystems.
• Strong stakeholder collaboration skills, with the ability to partner effectively with BAs, PMs, developers, and business leaders to shape user‑centred product direction.
• Advanced problem‑solving and design thinking abilities, using research, testing, and iterative refinement to validate concepts and drive high‑quality digital experiences.
• Leadership in design maturity, including mentoring others, maintaining design systems, ensuring UI consistency, and influencing UX strategy across products and team