Senior Product Designer (d/f/m)

Senior Product Designer (d/f/m) LocationLondonEmployment TypeFull timeLocation TypeHybridDepartmentProduct DesignOur story:Every year millions of people are either filing their taxes in fear or giving up on their tax refund altogether. We're working on fixing that. Our intuitive apps enable anyone, regardless of education or background, to file their taxes with newfound confidence.Spread across Germany, Spain and the UK, the team at Taxfix Group with its brands Taxfix and Steuerbot, is a compassionate group of solution-finders. We speak our minds openly, and with over 400 professionals, including tax experts, developers, and IT security experts, we're rich in ideas and voices. Taxfix has put €5 billion back into our customers' pockets and we aren't stopping there. Your opportunity:AI is shifting how the best products get built. The handoffs between product, design, and engineering are slowing us down. The companies moving fastest are doing it with people who own the full loop, from the user problem to the shipped feature, without losing the thread. We call these people Builders, and we're rebuilding our R&D organization around them.A Builder has a primary craft - yours is design - but they don't stop there. They stretch across product, design, and engineering as the situation demands, using AI to cover the gaps. They're accountable to outcomes, not job descriptions.In a world where it's easier than ever to get software to 75%, with AI-generated UI, no-code tools, and rapid prototyping, the last 25% is where everything is decided. That gap between "good enough" and "unforgettable" is where great designers live. If you find handoffs frustrating because you want to see your ideas through, this role is for you.You'll join the mission team building the UK product for its Consumer, Self-employed, and SME customers - a fast-evolving area that collaborates with a sister product in Spain. You'll work in close collaboration with our Head of Product for UK, engineers, and a small group of other people sharing the same goals. Your responsibilities and decisions:Take a user problem from rough idea to shipped interface. Write the brief, design the flow, prototype it, and ship it, with as few handoffs as possible. Own the full loop.Plan and own design activities within your mission team, aligning with timelines and quarterly OKRs. Translate business goals, technical constraints, and data into design solutions that can be implemented and measured.Support the rest of the UK team’s design thinking - pressure-test ideas, give direction, and sometimes deliver the designs outright so the team keeps moving.AI tools, Figma, or code, whatever gets there fastest. You use AI - including Claude Code - to explore, prototype, and accelerate, but your taste is the editorial layer. You know when AI-generated UI is wrong even when it looks right, and you fix it. You leverage agents and skills provided by Research, Content design, and others to deliver high-quality outputs. You use AI as a force multiplier.You deploy rapid, experience-driven experiments directly into production to evaluate customer demand and determine whether additional engineering resources are justified. You move fast, you test in the real product, and you don't wait to be unblocked.When the user problem calls for something new you extend our design system to cover the use case. You reason about what the right interaction is, then build it - contributing back to our design system if the pattern is effective and has broader use.You're the person who notices the detail others miss and pushes the work to where it needs to be. Not perfectionism for its own sake: the craft that makes a tax product feel trustworthy, where getting it wrong has real consequences for real people. Sweat the final 10%.You know the metric your team is trying to move. You measure your week by what changed for users, not by screens delivered. Be accountable to outcomes.You give feedback directly, to anyone, regardless...