Senior Frontend Design Systems Engineer (AI-Ready)

Mercury; San Francisco (CA); On-site; USD 201,000 - 251,000; Full time

Benefits offered by this job

Health insurance

Job summary

Mercury is seeking a Senior Frontend Engineer on the Design Systems team to build and care for the patterns that power Mercury's product. You will own components and foundations, ensuring accessibility, performance, and pixel-perfect craft while guiding UX through AI-enabled design approaches.

You should have 7+ years in frontend, strong React/TypeScript skills, and experience with design systems. Expect ownership, mentorship, and a focus on scalable UI patterns that enable other teams to move

Qualifications

• 7+ years of frontend development experience.
• Deep experience with React and TypeScript.
• Experience building or maintaining a design system or component library.
• Strong command of modern frontend tooling: build systems, CI/CD, testing.
• High agency, ownership, and ability to operate in ambiguous spaces.
• Hands-on fluency at the intersection of AI and software development.

Responsibilities

• Build and maintain the components, patterns, and foundations (tokens, type, color, layout) that Mercury's product is woven from, with accessibility, performance, and pixel-level craft.
• Lead projects that ship new UI patterns to solve real pain points for product teams, enabling faster delivery.
• Develop a design system ready for AI, applying technology to create leveraged outcomes.
• Invest in the design system's prototyping experience and guide the next iteration of rapid prototyping and iteration.
• Raise craft and AI fluency through mentorship and clear best practices.

Job description

Mercury is seeking a Senior Frontend Engineer on the Design Systems team to build and care for the patterns that power Mercury's product. You will own components and foundations, ensuring accessibility, performance, and pixel-perfect craft while guiding UX through AI-enabled design approaches.

You should have 7+ years in frontend, strong React/TypeScript skills, and experience with design systems. Expect ownership, mentorship, and a focus on scalable UI patterns that enable other teams to move