Sr Design System Technologist

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Job Overview

This role builds and evolves the AI-powered design system that supports digital products across Mint Mobile & Ultra Mobile's ecosystem, improving quality, scalability, and consistency through user-centered system design and intelligent automation. The role uses AI-driven workflows to accelerate component creation, streamline maintenance of component libraries, design tokens, and documentation, and improve the efficiency of multi-functional product delivery. Working closely with designers, engineers, and product partners, this position helps drive adoption of cohesive, scalable experiences while advancing AI-enabled design operations across the organization. This role also contributes to defining guidelines for integrating AI into design and development workflows, helping teams work more efficiently while maintaining high standards for usability, accessibility, and brand consistency. Success in this role requires a strong balance of systems thinking, collaboration, innovation, and continuous exploration of emerging AI technologies that enhance the product design lifecycle.

Job Responsibilities

• Use AI tools to accelerate component generation, streamline documentation and workflows, create interactive prototypes to test and iterate on concepts, and deliver functional component solutions to engineering for faster implementation.
• Lead the development and refinement of design tokens, reusable components, UI patterns, and component architecture to ensure cross-platform design-system consistency, governance, and innovative digital experiences across platforms.
• Partner with designers, engineers, Experience Design teams, Engineering Enablement Lanes, and the Design System Manager to understand requirements, technical constraints, and implementation workflows while fostering collaboration and streamlining communication between design and engineering teams.
• Research, build, and contribute to the initial front-end implementation of complex UI patterns, components, and interactive experiences; collaborate with engineering teams to transform prototypes into functional production-ready solutions across applications and teams.
• Drive design system adoption, consistency, innovation, and implementation workflows; build Figma plugins and contribution processes to improve designer and developer efficiency while promoting forward-thinking approaches to digital capabilities and user experiences.
• Create technical documentation for tokens, components, patterns, and usage guidelines; host workshops and training sessions to educate designers and engineers on emerging technologies, AI capabilities, Figma component-building guidelines, and scalable contribution workflows. Present complex solutions to technical and non-technical audiences while delivering accurate, high-quality work on schedule.

Education and Work Experience

• Bachelor's Degree or Certification in Computer Science, Web Development, or Software Engineering plus 5 years of related work experience OR Advanced degree with 3 years of related experience. Other acceptable areas of study include Digital Design, Human-Computer Interaction Design
• 4-7 years. Related experience in Interaction Design or Front-End development, creating innovative solutions for ecommerce websites and native apps.

Knowledge, Skills and Abilities

• High Proficiency in using AI tools like Claude and Codex to create hi-fidelity interactive prototypes and complex UI patterns.
• High proficiency in front-end development, including writing, reviewing, and auditing code to validate and optimize AI-generated design system libraries and component implementations.
• Strong understanding of design principles, modern UI patterns, elements, interactions, responsive web design and accessibility standards.
• Design and develop adaptable interfaces and components that deliver consistent, accessible, and optimized user experiences across devices, screen sizes, and platforms.
• Create modular, reusable component systems and patterns that support scalability, maintainability, and efficient collaboration across design and engineering teams.
• Expertise in Figma, HTML, CSS, JavaScript, React and Storybook.
• Excellent communication skills with the ability to verbally articulate technical details and bridge the communication gap between designers and engineers.
• Strong collaboration skills with the ability to work closely with designers and engineers.

Licenses and Certifications

• At least 18 years of age
• Legally authorized to work in the United States

Travel: Travel Required (Yes/No): Yes DOT Regulated: DOT Regulated Position (Yes/No): No Safety Sensitive Position (Yes/No): No Base Pay Range: $97,300 - $175,500 Corporate Bonus Target: 15%

The pay range above is the general base pay range for a successful candidate in the role. The successful candidate's actual pay will be based on various factors, such as work location, qualifications, and experience, so the actual starting pay will vary within this range.

At T-Mobile, employees in regular, non-temporary roles are eligible for an annual bonus or periodic sales incentive or bonus, based on their role. Most Corporate employees are eligible for a year-end bonus based on company and/or individual performance and which is set at a percentage of the employee's eligible earnings in the prior year. Certain positions in Customer Care are eligible for monthly bonuses based on individual and/or team performance.

At T-Mobile, our benefits exemplify the spirit of One Team, Together! A big part of how we care for one another is working to ensure our benefits evolve to meet the needs of our team members. Full and part-time employees have access to the same benefits when eligible. We cover all of the bases, offering medical, dental and vision insurance, a flexible spending account, 401(k), employee stock grants, employee stock purchase plan, paid time off and up to 12 paid holidays - which total about 4 weeks for new full-time employees and about 2.5 weeks for new part-time employees annually - paid parental and family leave, family building benefits, back-up care, enhanced family support, childcare subsidy, tuition assistance, college coaching, short- and long-term disability, voluntary AD&D coverage, voluntary accident coverage, voluntary life insurance, voluntary disability insurance, and voluntary long-term care insurance. We don't stop there - eligible employees can also receive mobile service & home internet discounts, pet insurance, and access to commuter and transit programs! To learn about T-Mobile's amazing benefits, check out

Never stop growing! As part of the T-Mobile team, you know the Un-carrier doesn't have a corporate ladder–it's more like a jungle gym of possibilities! We love helping our employees grow in their careers, because it's that shared drive to aim high that drives our business and our culture forward. By applying for this career opportunity, you're living our values while investing in your career growth–and we applaud it. You're unstoppable! T-Mobile USA, Inc. is an Equal Opportunity Employer. All decisions concerning the employment relationship will be made without regard to age, race, ethnicity, color, religion, creed, sex, sexual orientation, gender identity or expression, national origin, religious affiliation, marital status, citizenship status, veteran status, the presence of any physical or mental disability, or any other status or characteristic protected by federal, state, or local law. Discrimination, retaliation or harassment based upon any of these factors is wholly inconsistent with how we do business and will not be tolerated. Talent comes in all forms at the Un-carrier. If you are an individual with a disability and need reasonable accommodation at any point in the application or interview process, please let us know by emailing View email address on click.appcast.io or calling View phone number on click.appcast.io. Please note, this contact channel is not a means to apply for or inquire about a position and we are unable to respond to non-accommodation related requests.