Senior Software Engineer, Design Systems

Mercury

1h ago • Remote

Senior

Remote

200,700 - 250,900 USD/yr

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Quick Facts

  • Role: Senior Software Engineer, Design Systems (Senior Frontend Engineer)
  • Focus: Core design system patterns and foundations, UI pattern delivery, AI-ready design systems, and rapid prototyping enablement

Description

Build and care for the design system’s reusable components and foundations—tokens, type, color, and layout—that other product teams rely on. Lead initiatives shipping new UI patterns to address real pain points, while evolving the system for AI-era software development and improving the team’s prototyping workflow. Mentor others by establishing clear best practices, raising both engineering craft and AI fluency.

Responsibilities

  • Build and maintain design system components, patterns, and foundations; uphold high standards for accessibility, performance, and pixel-level detail.
  • Lead projects that deliver new UI patterns to help product teams build better experiences faster.
  • Develop an AI-ready design system, applying emerging AI paradigms for practical leverage.
  • Improve the design system’s prototyping experience to shape how teams rapidly prototype, iterate, and explore new concepts.
  • Raise the craft and AI fluency of teammates through mentorship and documented best practices.

Requirements

  • 7+ years of frontend development with deep experience in React, TypeScript, and modern web technologies.
  • Experience building or maintaining a design system or shared component library.
  • Thorough command of frontend tooling: build systems, CI/CD, and testing.
  • High agency and ability to create clarity in ambiguous situations; take ownership and move without a predefined path.
  • First-principles systems thinking oriented to outcomes and measurable results.
  • Strong product taste and an instinct for leverage across teams.
  • Hands-on fluency at the intersection of AI and software development, with the ability to translate emerging AI paradigms into practical leverage.

Benefits

  • Total rewards include base salary, equity (stock options/RSUs), and benefits.
  • Competitive base salary and equity ranges for SaaS/fintech, updated using industry compensation survey data.
  • Target base salary ranges: US $200,700–$250,900; Canada $189,700–$237,100.

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