Senior Design Systems Engineer | AI-Ready UI Patterns

Mercury; San Francisco, New York, Portland (CA, NY, OR); Hybrid; USD 201,000 - 251,000; Full time

Job summary

Mercury is seeking a Senior Frontend Engineer to own and evolve our design systems used across fintech products. You will build components, tokens, and foundations in React and TypeScript, ensuring accessibility, performance, and a scalable base ready for AI-driven features.

You’ll lead system-wide initiatives, mentor peers, and partner with product teams to ship fast, polished interfaces. This remote-friendly role supports US and Canada locations, with multiple hubs and collaboration across

Qualifications

• 7+ years of frontend development experience.
• Experience building or maintaining a design system.
• Strong command of modern frontend tooling (build systems, CI/CD, testing).
• Ability to own projects and drive clarity in ambiguous spaces.
• Experience integrating AI capabilities into frontend work is a plus.

Responsibilities

• Build and maintain the design system components and foundations.
• Lead projects delivering new UI patterns for product teams.
• Develop AI-ready patterns and prototyping capabilities.
• Mentor teammates and propagate best practices.
• Collaborate with design, product, and backend engineers.

Skills

React

TypeScript

Frontend development

Design system

Tools

Build systems

CI/CD

Testing

Job description

Mercury is seeking a Senior Frontend Engineer to own and evolve our design systems used across fintech products. You will build components, tokens, and foundations in React and TypeScript, ensuring accessibility, performance, and a scalable base ready for AI-driven features.

You’ll lead system-wide initiatives, mentor peers, and partner with product teams to ship fast, polished interfaces. This remote-friendly role supports US and Canada locations, with multiple hubs and collaboration across