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

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Be the center of product innovation and design at T-Mobile. As a critical leader on the Product, Experience Design & Innovation team, the Senior Product Designer for Emerging Technologies will partner with the AI product and development teams to reimagine our digital products across the enterprise. The successful candidate will be responsible for designing human-centered experiences that integrate AI capabilities, ensuring they are intuitive, ethical, and valuable for users. The role requires a mix of UX design, UI design, interaction design, AI understanding, experience with Apps and strategic thinking. 

Job 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. 
      

  AI Strategy & Collaboration 

  • Partner with the AI leads to drive the UX Roadmap and AI strategy framework through partnership with key leaders and other Principal Designers to ensure cohesive product experiences across lines of businesses (LOBs)  and overarching AI Strategy. 

  • Collaborates closely with a Principal Designer and other senior team members, incorporating feedback with a growth mindset and a focus on shared outcomes. 

  • Collaborates with Product Managers, Engineers, and AI Researchers to ground AI features in user needs and expectations. 

  • Advocates for ethical AI use, ensuring transparency, inclusivity, and fairness in AI-driven experiences. 

  • Acts as a design thinking evangelist — demonstrating how thoughtful, inclusive design fuels more impactful, trustworthy AI