Senior Software Engineer - Design Systems

USAFull-time2026-11-08 → 2026-11-10

Core

Build and maintain reusable components, patterns, and design-system foundations including tokens, type, color, and layout to support AI-assisted software development.

Role type

Senior IC design systems engineer

Builds

Reusable UI components, design system foundations, and AI-assisted development tools

Domain

Software development, Design Systems, AI integration

Deliverable

production ML models

Required skills

React, TypeScript, frontend build systems, CI/CD, testing, accessibility, performance optimization, systems thinking, AI fluency

Preferred skills

Mentoring, establishing best practices, product judgment

Technologies

React, TypeScript

Responsibilities

Build and maintain reusable components and design-system foundations; Lead projects delivering new UI patterns; Develop a design system supporting AI-assisted software development; Improve prototyping experience for rapid iteration; Mentor teammates on frontend craft and AI fluency; Maintain high standards for accessibility, performance, and visual quality

Seniority

Senior, hands-on IC

About Mercury

Mercury is on a mission to defy those expectations. We're a financial technology company that helps startups spend less time banking* and more time building. We believe that the key to our success revolves around thoughtful design — and we hold the craft of that design to an exceptionally high standard. We're looking for a Staff Brand Designer who sets that bar: someone whose eye is so precise, and whose execution is so considered, that the work around them gets better just by virtue of their presence.