Senior AI Design System Engineer

T-MOBILE USA, Inc.; Bellevue (WA); Hybrid; USD 97,300 - 175,500; Full time

Benefits offered by this job

Competitive base salary

Annual stock grant

Employee stock purchase plan

401(k)

Paid time off

Bonuses and incentives

Wellness and financial coaching

Employee discounts

Job summary

T-Mobile USA, Inc. in Bellevue, WA is seeking a design-systems engineer to build and evolve AI-powered design systems across Mint Mobile and Ultra Mobile.

You will accelerate component creation, maintain libraries, design tokens, and documentation, and work with designers and engineers to deliver cohesive experiences across platforms. The role emphasizes AI-driven workflows, scalable guidelines, accessibility, and brand consistency.

Qualifications

• Bachelor's degree in Computer Science, Web Development or Software Engineering with 5+ years of experience.
• Experience in interaction design or front-end development for ecommerce and native apps.
• Proficiency with AI tools to prototype and test UI systems.
• Strong design sense, accessibility and responsive design focus.

Responsibilities

• Use AI to accelerate component generation and documentation, and deliver production-ready UI solutions.
• Lead design tokens, reusable components, UI patterns, and cross-platform governance.
• Collaborate with designers, engineers, and partners to translate requirements into scalable systems.
• Develop front-end implementations and contribute to scalable contribution workflows.

Skills

AI tools (Claude Codex)

UI design systems

Cross-functional collaboration

Design tokens

Figma

HTML CSS JS

React

Storybook

Education

Bachelor's degree in CS or related field

5 years related work experience

Tools

Figma

HTML

CSS

JavaScript

React

Storybook

Job description

T-Mobile USA, Inc. in Bellevue, WA is seeking a design-systems engineer to build and evolve AI-powered design systems across Mint Mobile and Ultra Mobile.

You will accelerate component creation, maintain libraries, design tokens, and documentation, and work with designers and engineers to deliver cohesive experiences across platforms. The role emphasizes AI-driven workflows, scalable guidelines, accessibility, and brand consistency.