Sr. Product Designer — Mobile UI & Interaction (AI)

Responsibilities:

• Designs and delivers intuitive, visually compelling interactive interfaces that reflect the brand and meet accessibility standards, with a strong focus on UI quality, visual design, and interaction craft.
• Demonstrates a keen eye for detail across layout, hierarchy, motion, and typography, producing high-quality work that elevates product experiences and design consistency.
• Applies and contributes to design systems, ensuring scalable, elegant solutions across AI-powered and traditional product surfaces.
• Develops sketches, journey maps, workflow diagrams, wireframes, high-fidelity prototypes, and interaction flows to visualize complex AI behaviors and adaptive user experiences.
• Leads end-to-end prototyping efforts using tools like Figma, Protopie, Voiceflow, or custom solutions — especially for conversational, voice, or generative interfaces.
• Partners closely with Principal Designer, engineering and product teams throughout the project lifecycle to validate AI and dynamic system behaviors against design intent, providing actionable feedback during design QA cycles.
• Collaborates with cross-functional teams to understand business goals, technical constraints, user needs, and emerging AI capabilities.
• Works alongside User Researchers and fellow Designers to ensure cross-application design consistency and to solve ecosystem-wide UX challenges.
• Partners closely with engineering and product teams throughout the project lifecycle — validating AI or dynamic system behaviors against design intent, and providing clear, actionable feedback during design QA cycles.

Skills:

• The role requires a mix of UX design, UI design, interaction design, AI understanding, experience with Apps and strategic thinking
• Designs for AI-specific challenges, including handling uncertainty, confidence thresholds, edge cases, and system transparency
• Bachelor’s degree in human-centered design, computer science, HCI, psychology, or equivalent professional experience
• 4–7 years of experience in UX, UI, product design, or digital strategy roles, with a strong cross-functional collaboration track record
• Demonstrated experience designing and shipping high-quality digital products that include AI or adaptive behaviors
• Demonstrated expertise in advanced, non-linear interaction design, with a strong attention to detail across micro interactions, motion, and fluid transitions—shaping interfaces that feel intuitive, expressive, and alive
• Exceptional portfolio showcasing visual design excellence, thoughtful interaction design, and a command of UI and prototyping best practices
• Proficiency in Figma and prototyping tools (e.g., Protopie, Framer, Voiceflow, or similar); experience with conversational and multi-modal UI design preferred
• Strong understanding of and experience applying design systems in production environments
• Ability to lead highly complex, technical projects in fast-paced, cross-functional environments
• Excellent communication, presentation, and storytelling skills — able to influence and align with technical and executive stakeholders
• Receptive to feedback and able to iterate quickly; thrives in collaborative environments and values team success
• Comfortable navigating ambiguity and driving clarity through design

Benefits:

• 💼 Our Total Rewards Package ensures that employees get the same big love we give our customers
• 💰 All team members receive a competitive base salary and compensation package - this is Total Rewards
• 💵 Employees enjoy multiple wealth-building opportunities through our annual stock grant, employee stock purchase plan, 401(k), and access to free, year-round money coaches
• 💰 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
• 🏥 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 [www.t-mobilebenefits.com](www.t-mobilebenefits.com)