Lead UX/UI Designer

Delta-Capita; Greater London; Hybrid; GBP 65,000 - 95,000; Full time

Job summary

Delta Capita in London is seeking an experienced, hands-on Lead UX/UI Designer to cover a 12-month maternity leave, starting November 2026, based in our London office. You will own the design of complex, multi-stakeholder products end to end, from early problem solving through to prototypes and production-ready UI.

You will mentor junior designers, collaborate with product managers and engineers, ship in short cycles, and ensure accessibility and quality against WCAG 2.2 AA standards.

Qualifications

• Proven track record as a Lead UX/UI Designer for large-scale digital products.
• Experience mentoring or line-managing junior designers.
• Strong collaboration with product managers, engineers and stakeholders.

Responsibilities

• Own complex projects end to end from discovery to final UI specifications.
• Design and prototype interactive flows and test concepts with users.
• Run workshops to drive strategic alignment across teams.
• Maintain and evolve the design system and component library.
• Support junior designers with direction and critique sessions.

Skills

Lead design ownership

Mentoring juniors

Cross-functional collaboration

Accessibility WCAG 2.2

Prototyping

Tools

Sketch

Job description

Lead UX/UI Designer

Fixed-term contract, 12 months (maternity cover)

London — hybrid, with regular presence in our London office

Delta Capita is a global provider of managed services, technology and consulting to the financial services industry. Design sits at the centre of how we build our products. Our team shapes the interfaces our clients and their customers use every day.

We are looking for an experienced, hands-on Lead UX/UI Designer to cover a 12-month period of maternity leave, starting November 2026 and based in our London office. You will own the design of complex, multi-stakeholder products end to end - from early problem solving through to prototypes and production-ready UI. You’ll work closely with engineering and product teams on a day-to-day basis, with support from senior stakeholders as needed.

You will be comfortable making confident design decisions, shipping in short cycles, and iterating once real feedback arrives. You will be responsible for leading other junior designers in the team, to make help them make decisions, give feedback and make sure work is delivered to a high standard and on time.

Key responsibilities

• Own complex projects end to end. Take full design accountability for one or more product workstreams, from early discovery through wireframes, prototypes and final UI specification.
• Design and prototype. Produce interactive prototypes in Sketch to test flows, validate concepts with users and align stakeholders before build.
• Run and facilitate workshops. Across teams and features, driving strategic alignment.
• Maintain and evolve the design system. Extend our component library and design standards so that work across the team stays consistent, accessible and reusable.
• Support junior designers. Set direction, review work, run critique sessions and support the day-to-day development of junior members of the design team.
• Partner with product and engineering. Work closely with product managers to shape requirements, and with developers to ensure designs are implemented faithfully and are technically feasible.
• Deliver at pace. Prioritise, break large problems into shippable increments and keep momentum across parallel workstreams.
• Uphold accessibility and quality. Ensure designs meet WCAG 2.2 AA standards and our internal quality bar before handover.

Essential skills and experience

• Proven track record as a lead UX/UI designer, with a portfolio demonstrating ownership of complex, large-scale digital products.
• Advanced working knowledge of Sketch, including symbols, libraries and shared styles.
• Strong prototyping ability - you can move from a rough concept to a testable interactive prototype quickly.
• Demonstrable experience mentoring or line-managing junior designers.
• Confident collaborating with product managers, engineers, business stakeholders and, where relevant, clients.
• Evidence of delivering high-quality work at pace in an agile environment.
• Excellent communication skills - you can explain and defend design decisions to non-designers.
• Right to work in the UK (we are unable to offer visa sponsorship for this fixed-term role).

Nice to have

• Previous experience designing for fintech, banking or another regulated financial services environment.
• Familiarity with Sketch
• Exposure to enterprise or B2B products with dense interfaces and complex workflows.
• Experience running user research and usability testing directly.

How We Work:

Delta Capita is an equal opportunity employer. We positively encourage applications from suitably qualified and eligible candidates regardless of age, colour, disability, national origin, ancestry, race, religion, gender, sexual orientation, gender identity and/or expression, veteran status, genetic information, or any other status protected by applicable law.

We will ensure that individuals with disabilities are provided reasonable accommodation to participate in the job application or interview process, to perform essential job functions, and to receive other benefits and privileges of employment. If you require any reasonable adjustments through your interview process, please inform us.

Who We Are:

Delta Capita Group (a member of the Prytek Group) is a global managed services, consulting, and solutions provider with a unique combination of experience in Financial Services and technology innovation capability. Our mission is to reinvent the financial services value chain providing technology based mutualized services for financial institutions for non-differentiating services.