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Mercury

Senior Software Engineer – Design Systems

Mercury

. Build and maintain components, patterns, and foundations including tokens, type, color, and layout .

Posted 11/6/2026full-timeRemote • United States, CanadaSenior💰 $200,700 - $250,900 per yearWebsite

Core Competencies

Role fit
Core Competencies

Use this summary to align your resume positioning with the role.

Demonstrates extensive experience in Frontend Development with a strong focus on React, TypeScript, and modern web technologies. Capable of leading the creation and maintenance of design systems while mentoring colleagues in best practices and AI fluency.

Highest-signal resume keywords
Frontend DevelopmentReactTypeScriptDesign System DevelopmentAI Fluency

ATS Keywords

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Applicant Tracking System Keywords

Tip: use these terms in your resume and cover letter to boost ATS matches.

Hard Skills
Frontend DevelopmentReactTypeScriptDesign System DevelopmentComponent Library MaintenanceModern Web TechnologiesCI/CDTestingPrototypingSystems Thinking
Soft Skills
High AgencyClarity in AmbiguityStrong Product TasteMentorship
Tools & Technologies
Build SystemsModern Frontend Tooling
Industry Keywords
AccessibilityPerformancePixel-Level CraftAI Integration

Tech Stack

Tools & technologies
ReactTypeScript

About the role

Key responsibilities & impact
  • Build and maintain components, patterns, and foundations including tokens, type, color, and layout
  • Maintain high standards for accessibility, performance, and pixel-level craft
  • Lead projects that ship new UI patterns solving product-team pain points
  • Develop a design system ready for AI and people, applying technology to create leveraged outcomes
  • Invest in the design system's prototyping experience
  • Shape how the design function rapidly prototypes, iterates on the product, and explores new concepts
  • Raise the craft and AI fluency of colleagues through mentorship and clear best practices

Requirements

What you’ll need
  • 7+ years of frontend development experience
  • Deep experience in React, TypeScript, and modern web technologies
  • Experience building or maintaining a design system or shared component library
  • Thorough command of modern frontend tooling, including build systems, CI/CD, and testing
  • High agency and comfort creating clarity in ambiguous spaces
  • First-principles systems thinking oriented to outcomes
  • Strong product taste and an instinct for leverage
  • Hands-on fluency at the intersection of AI and software development
  • Ability to turn emerging AI paradigms into practical leverage for the design system and its users

Benefits

Comp & perks
  • Equity (stock options/RSUs)
  • Benefits
  • Reasonable accommodations throughout the recruitment process for applicants with disabilities or special needs