Senior Frontend Engineer (Design Systems, AI)

TL;DR

Senior Frontend Engineer (Design Systems): Building and maintaining the foundational components and UI patterns for a fintech platform with an accent on accessibility, performance, and AI integration. Focus on developing scalable design systems that empower product teams and exploring how AI paradigms can enhance software development workflows.

Location: Must be based in the United States or Canada (Remote or Hybrid in San Francisco, New York, or Portland).

Salary: $166,600 – $208,300 (US) / CAD 157,400 – 196,800 (Canada).

Company

Mercury is a fintech company providing banking services for startups and businesses.

What you will do

• Build and maintain core components, patterns, and foundations including tokens, type, color, and layout.
• Lead projects to ship new UI patterns that solve pain points for product teams.
• Develop a design system optimized for both human users and AI-driven development.
• Improve the prototyping experience to accelerate product iteration and concept exploration.
• Mentor team members and establish best practices for craft and AI fluency.

Requirements

• 4+ years of frontend development experience with React and TypeScript.
• Deep experience building or maintaining a design system or shared component library.
• Thorough command of modern frontend tooling, build systems, CI/CD, and testing.
• Strong systems thinking and product taste with a focus on leveraged outcomes.
• Hands-on fluency at the intersection of AI and software development.
• Must be authorized to work in the United States or Canada.

Culture & Benefits

• Competitive total rewards package including base salary and equity (stock options/RSUs).
• Commitment to diversity, belonging, and equal employment opportunity.
• Supportive environment for professional growth and mentorship.
• Focus on high-agency work and solving complex, ambiguous problems.