Senior UI Engineer - Design System

🔒 Confidential Employer
Posted 21 March 2026
LOCATION
London
TYPE
Full-time
LEVEL
Mid-Senior level
CATEGORY
Technology
This employer holds a UK Home Office sponsor license — sponsorship for this specific role is at the employer’s discretion

SKILLS

React HTML CSS JavaScript Design Systems UX Problem-solving Communication

FULL DESCRIPTION

[Employer hidden — view at passion-project.co.uk] is looking for a Senior Front-End Engineer to join their global business. The role involves collaborating with cross-functional teams, designing and developing applications, and working in a fast-paced environment. The ideal candidate will have experience with front-end technologies, design systems, and UX principles.

What you will be doing

  • Collaborate with cross-functional teams to understand user needs and design requirements for the design system.
  • Develop and maintain documentation for the design system, including design principles, guidelines, and component libraries.
  • Ensure that the design system is accessible, responsive, and optimized for performance across multiple platforms and devices.
  • Work closely with the UX team to ensure that the design system aligns with the organization's design language and branding.
  • Continuously evaluate and improve the design system based on user feedback, industry best practices, and emerging technologies.
  • Implement and maintain a consistent and scalable development process for the design system.
  • Provide technical guidance and mentorship to team members, promoting knowledge sharing and skill development.
  • Collaborate with other engineering teams to integrate the design system into our products and platforms.
  • Contribute to a healthy engineering culture of feedback and growth.

What we are looking for

  • Strong experience with front-end development technologies such as HTML, CSS, JavaScript, and React.
  • Experience with design systems, component-based design, and design tools such as Sketch or Figma.
  • Proven experience with a modern JS toolchain: e.g. Bun, Turborepo, Typescript, Biome,...
  • A passion to write well-structured, easily maintainable, well-documented code that balances beauty and pragmatism
  • Strong understanding of user experience principles, design thinking, and design methodologies.
  • Excellent problem-solving skills and ability to work in a fast-paced environment.
  • Strong communication skills, ability to self-organise and work well within teams
  • Ability to plan and deliver engineering projects
  • Creative thinking and problem-solving mindset
  • Ability to interact with people from across the business and build strong relationships, including the ability to influence upwards effectively
  • Self-starter and proactive approach
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