Senior Product Designer

📍 Job Overview

Job Title: Senior Product Designer

Company: T-Mobile

Location: Philadelphia, PA, United States / New York, NY, United States

Job Type: FULL_TIME

Category: Product Design / User Experience (UX) Operations

Date Posted: May 26, 2026

Experience Level: 5-10 Years

Remote Status: On-site

🚀 Role Summary

• Drive the end-to-end design vision and execution for enterprise software powering T-Mobile's digital out-of-home (DOOH) advertising marketplace (T-Ads).

• Strategically uncover user needs and translate insights into intuitive, consistent, and user-centric product experiences.

• Collaborate closely with Product Managers, Engineers, and business stakeholders to balance customer needs, business goals, and technical feasibility.

• Contribute to and evolve the T-Ads design system, pattern libraries, and principles to ensure design consistency across the product ecosystem.

📝 Enhancement Note: This role is positioned within T-Mobile's advertising solutions division, suggesting a focus on complex enterprise software that supports advertising operations, campaign management, and marketplace functionalities. The emphasis on "speed and business potential" indicates a need for designers who can deliver impactful solutions efficiently within a fast-paced GTM environment.

📈 Primary Responsibilities

• Own the complete product design lifecycle, from initial discovery and user research to the creation of user flows, wireframes, high-fidelity prototypes, and comprehensive design guidelines.

• Facilitate cross-functional collaboration with product and engineering teams to refine requirements, negotiate scope, and ensure design solutions align with business objectives and technical constraints.

• Independently plan and conduct qualitative and quantitative user research, including direct engagement with internal and external users to identify pain points and validate design concepts.

• Actively contribute to the development, maintenance, and evolution of the T-Ads design system, ensuring adherence to established principles, guidelines, and pattern libraries for consistent user experiences.

• Translate complex business requirements and user needs into intuitive and efficient digital product solutions that drive user adoption and achieve business outcomes.

• Champion user-centered design principles throughout the product development process, advocating for the user and ensuring their needs are met.

• Participate in product strategy discussions, providing design perspective and insights to inform roadmap planning and feature prioritization.

📝 Enhancement Note: The responsibilities highlight a senior-level individual contributor role with significant autonomy and ownership. The emphasis on "minimal oversight" and "independently" conducting research underscores the expectation for a self-starter with proven experience in managing the entire design process.

🎓 Skills & Qualifications

Education: Bachelor's Degree in User Experience (UX), Human-Computer Interaction (HCI), Computer Science, Engineering, or a closely related field. An advanced degree in a similar area is also acceptable.

Experience: A minimum of 4-7 years of relevant professional experience in product design, UX/UI design, or a related field. Candidates must possess a strong portfolio showcasing their design process, problem-solving abilities, and delivered solutions.

Required Skills:

• User Experience Design: Mastery of end-to-end UX design principles, including information architecture (IA), interaction design, and visual design.

• Communication: Exceptional verbal and written communication skills, with the ability to articulate and persuasively defend design decisions to diverse stakeholders.

• Project Management: Strong organizational and prioritization skills, capable of managing multiple concurrent design workstreams effectively amidst shifting deadlines.

• User Research: Demonstrated expertise in planning and independently conducting both qualitative and quantitative user research to gather actionable insights.

• Design Systems & UI Frameworks: Proven experience contributing to and maintaining design systems and pattern libraries. Working knowledge of common UI frameworks and an understanding of front-end development constraints are crucial.

• Prototyping & Wireframing: Proficiency in creating detailed wireframes and interactive high-fidelity prototypes to effectively communicate design concepts.

• User Flows: Ability to map out complex user journeys and task flows to ensure intuitive navigation and task completion.

Preferred Skills:

• Experience with digital out-of-home (DOOH) advertising platforms or complex enterprise advertising software.

• Familiarity with Agile development methodologies and cross-functional team collaboration in an Agile environment.

• Experience working with diverse user groups, including internal enterprise users and external advertising clients.

• Knowledge of common UI frameworks and front-end development constraints.

📝 Enhancement Note: The requirement for a portfolio is critical for this role, as it serves as the primary evidence of a candidate's design capabilities, problem-solving approach, and ability to translate complex needs into effective user experiences. Emphasis on "independent" research suggests a need for candidates who can operate with a high degree of autonomy.

📊 Process & Systems Portfolio Requirements

Portfolio Essentials:

• End-to-End Case Studies: Showcase at least 2-3 comprehensive case studies detailing your involvement in the entire product design lifecycle, from initial discovery and user research to final design implementation and iteration.

• Problem/Solution Articulation: Clearly define the business problem or user pain point addressed in each case study, and articulate how your design solutions effectively solved it.

• Process Documentation: Illustrate your design process with examples of user flows, wireframes, interactive prototypes, and high-fidelity mockups. Include rationale behind key design decisions.

• User Research Integration: Demonstrate how user research (qualitative and quantitative) informed your design decisions and validated your proposed solutions within each case study.

• Design System Contribution: If applicable, showcase examples of your contributions to design systems, pattern libraries, or style guides, highlighting how you ensured consistency and scalability.

Process Documentation:

• Workflow Design & Optimization: Provide examples of how you've mapped and optimized complex user workflows to improve efficiency and user satisfaction.

• System Implementation Standards: Detail your experience in creating and adhering to design guidelines and pattern libraries to ensure consistency across a product ecosystem.

• Measurement & Performance Analysis: Explain how you've used data and user feedback to iterate on designs and measure the impact of your design solutions on key business metrics.

📝 Enhancement Note: Given the senior nature of this role and its focus on enterprise software, a portfolio demonstrating experience with complex systems, robust user research, and contributions to design systems will be highly valued. The ability to articulate the impact of design on business outcomes is paramount.

💵 Compensation & Benefits

Salary Range: $97,300 - $175,500 per year.

Explanation of Range: This range is determined by T-Mobile's compensation philosophy, considering factors such as geographic location (Philadelphia and New York City are high cost of living areas), candidate qualifications, experience level, and market benchmarks for Senior Product Designer roles within the technology and advertising sectors. The $97,300 figure represents an entry-level for a Senior Designer in a lower cost area, while $175,500 represents a highly experienced candidate in a major metropolitan area.

Benefits:

• Comprehensive Health Coverage: Medical, Dental, and Vision Insurance to support employee well-being.

• Financial Well-being Programs: Flexible Spending Account, 401(k) with company match potential, Employee Stock Grants, and an Employee Stock Purchase Plan for wealth building.

• Work-Life Balance: Generous Paid Time Off and approximately 12 paid holidays annually (equating to about 4 weeks for new full-time employees).

• Family Support: Paid Parental and Family Leave, Family Building Benefits, Back-up Care, Enhanced Family Support, Childcare Subsidy, and Tuition Assistance for continued education and family needs.

• Career Development: College Coaching to support educational aspirations.

• Income Protection: Short-term and Long-term Disability insurance.

• Voluntary Insurance Options: AD&D, Accident, Life, Disability, and Long-term Care insurance for additional security.

• Lifestyle Perks: Mobile Service & Home Internet Discounts, Pet Insurance, and access to Commuter and Transit Programs.

Working Hours: Standard full-time work, typically 40 hours per week. While the role is on-site, T-Mobile emphasizes flexibility where possible in alignment with business needs and team collaboration requirements. Core business hours will likely apply, with potential for occasional extended hours during critical project phases.

📝 Enhancement Note: T-Mobile offers an exceptionally broad and robust benefits package, indicating a strong commitment to employee well-being and long-term engagement. The inclusion of financial wellness tools and extensive family support programs is a significant differentiator.

🎯 Team & Company Context

🏢 Company Culture

Industry: Telecommunications, Technology, Advertising Solutions. T-Mobile is a leading wireless network operator that has expanded significantly into advertising technology with its T-Ads division, leveraging its customer data and network reach.

Company Size: Large Enterprise (T-Mobile is a Fortune 500 company with tens of thousands of employees globally). This provides stability, significant resources, and opportunities for impact at scale, but may also mean navigating more established processes.

Founded: T-Mobile USA's origins trace back to the 1990s, with significant mergers and acquisitions shaping its current form. The T-Ads division represents a more recent strategic expansion into the advertising technology space.

Team Structure:

• The Senior Product Designer will report to the Head of Product Design within the T-Ads division.

• This role involves close collaboration with Product Managers, Engineers, UX Researchers, and other designers.

Methodology:

• Data-Driven Product Development: T-Mobile emphasizes leveraging data and insights to inform product decisions, from user research to performance analysis of launched features.

• Agile & Lean Principles: While not explicitly stated, large tech companies like T-Mobile typically operate with Agile or Lean methodologies, prioritizing iterative development and rapid feedback loops.

• User-Centric Design: A core tenet of the role is to champion the user, ensuring that design solutions are intuitive, accessible, and meet user needs effectively.

Company Website: https://www.t-mobile.com/

📝 Enhancement Note: T-Mobile's "Un-carrier" branding suggests a culture that values innovation, challenging the status quo, and a direct, customer-focused approach. The T-Ads division likely operates with a blend of enterprise stability and the agility required in the competitive ad-tech landscape.

📈 Career & Growth Analysis

Operations Career Level: This is a Senior-level individual contributor role. It signifies a high degree of autonomy, expertise, and responsibility in product design. The focus is on executing complex design challenges, mentoring junior designers (implicitly), and significantly influencing product direction through design.

Reporting Structure: The role reports to the Head of Product Design, indicating a clear line of leadership and mentorship within the design function. This structure allows for strategic guidance and career development discussions.

Operations Impact: The Senior Product Designer will have a direct impact on the usability, efficiency, and adoption of enterprise software critical to T-Mobile's advertising solutions business. By creating intuitive and effective user experiences, this role will empower users to achieve their goals, thereby driving revenue and business outcomes for T-Ads.

Growth Opportunities:

• Leadership in Design: Potential to grow into a Lead Product Designer or Design Manager role, overseeing design teams and strategy.

• Specialization: Opportunity to deepen expertise in enterprise software design, advertising technology, or specific areas of UX research and strategy.

• Cross-Functional Influence: Develop stronger strategic partnerships with Product Management and Engineering, influencing product roadmaps and business strategy.

• Mentorship: Opportunity to mentor junior designers and contribute to the overall growth and skill development of the design team.

• Broad Exposure: Work on a high-impact product suite within a major telecommunications and technology company, offering diverse learning experiences.

📝 Enhancement Note: The "jungle gym of possibilities" mentioned in the job description implies T-Mobile actively supports internal mobility and career development. For a Senior Product Designer, growth can come from deepening design expertise, moving into leadership, or transitioning into related product strategy roles.

🌐 Work Environment

Office Type: This is an on-site role, implying a traditional office-based work environment. T-Mobile offices are typically modern and equipped to support collaborative work.

Office Location(s): Philadelphia, PA (Center City E-Suite) and New York, NY. Both are major metropolitan hubs offering access to talent, resources, and a vibrant professional community.

Workspace Context:

• Collaborative Spaces: Expect open-plan areas, meeting rooms, and potentially dedicated design studios designed to foster collaboration among design, product, and engineering teams.

• Tools & Technology: Access to standard enterprise software, design tools, and potentially specialized ad-tech platforms. High-speed internet and necessary hardware will be provided.

• Team Interaction: Frequent opportunities for in-person collaboration, brainstorming sessions, design critiques, and team meetings. This environment is conducive to rapid iteration and knowledge sharing.

Work Schedule: The role is full-time, with standard business hours. While primarily on-site, the company culture may allow for some flexibility in start/end times, provided work is completed and team collaboration is maintained. Occasional travel may be required for team meetings or user research, as indicated by the "Travel Required: Yes" status.

📝 Enhancement Note: The on-site requirement suggests T-Mobile values in-person collaboration for design roles, especially within complex product development cycles. Candidates should be prepared for a structured office environment in a major city.

📄 Application & Portfolio Review Process

Interview Process:

• Initial Screening: HR or Recruiter will review applications and portfolios for basic qualifications and alignment with role requirements.

• Hiring Manager Interview: A discussion with the Head of Product Design to assess experience, design philosophy, and fit with the team's objectives. Portfolio review will be a key component.

• Design Challenge/Portfolio Deep Dive: Candidates may be asked to present a detailed case study from their portfolio, discussing their process, decision-making, and impact. Alternatively, a design exercise relevant to T-Ads' challenges might be administered.

• Cross-Functional Interviews: Interviews with Product Managers and Engineers to evaluate collaboration skills, technical understanding, and ability to work within a cross-functional team.

• Final Round: Potentially an interview with a senior leader or a panel to assess overall fit and strategic thinking.

Portfolio Review Tips:

• Curate Strategically: Select 3-4 strong case studies that best represent your skills in enterprise software design, complex problem-solving, and end-to-end UX. Highlight projects with significant impact or challenging constraints.

• Tell a Story: For each case study, clearly articulate the problem, your role, your process (research, ideation, design, testing), key decisions and rationale, and the measurable outcomes/impact. Use visuals effectively.

• Showcase Process, Not Just Pixels: Emphasize your thinking, research methodologies, and how you iterated based on feedback. Detail your collaboration with PMs and Engineers.

• Design System Examples: If you have contributions to design systems, clearly illustrate how you applied them or how you helped build/maintain them.

• Be Prepared to Discuss: Anticipate questions about your design choices, how you handle feedback, your approach to user research, and your understanding of technical constraints.

Challenge Preparation:

• Understand the Domain: Research T-Mobile Advertising Solutions (T-Ads), the DOOH advertising market, and common challenges in enterprise ad-tech platforms.

• Focus on User & Business: Frame your solutions around solving user pain points while also driving business value for T-Mobile.

• Articulate Your Process: Be ready to explain your design process clearly and logically, even under time pressure.

• Simulate Collaboration: Practice explaining your design decisions as if you were presenting to Product Managers and Engineers, anticipating their questions and concerns.

📝 Enhancement Note: The emphasis on a portfolio and the potential for a design challenge indicates T-Mobile places significant value on practical design skills and problem-solving abilities. Candidates should prepare to demonstrate their process and impact thoroughly.

🛠 Tools & Technology Stack

Primary Tools:

• Design & Prototyping: Figma, Sketch, Adobe Creative Suite (Illustrator, Photoshop), InVision, Axure RP (or similar for advanced prototyping).

• User Research & Testing: UserTesting.com, Maze, Qualtrics, SurveyMonkey, Lookback (or similar platforms for conducting and analyzing research).

• Collaboration & Project Management: Jira, Confluence, Asana, Trello, Slack, Microsoft Teams.

Analytics & Reporting:

• Product Analytics: Google Analytics, Adobe Analytics, Mixpanel, Amplitude (for understanding user behavior within the product).

• Data Visualization: Tableau, Power BI (for creating dashboards and reporting on product performance).

CRM & Automation:

• CRM: Salesforce (likely used by sales teams interacting with the ad platform), internal CRM systems.

• Automation: Understanding of workflow automation principles within enterprise software, though direct tool experience may vary.

📝 Enhancement Note: Proficiency in industry-standard design and prototyping tools like Figma or Sketch is essential. Experience with user research platforms and project management tools like Jira is also highly relevant for seamless integration into the development workflow.

👥 Team Culture & Values

Operations Values:

• User-Centricity: A deep commitment to understanding and advocating for user needs in all design decisions.

• Innovation & Agility: Embracing new ideas and adapting quickly to market changes and business requirements, reflecting the "Un-carrier" spirit.

• Collaboration & Teamwork: Fostering a supportive environment where cross-functional teams work together to achieve common goals.

• Impact & Results-Driven: Focusing on delivering designs that not only look good but also drive measurable business outcomes and user success.

• Continuous Improvement: A dedication to refining processes, learning new skills, and improving products iteratively.

Collaboration Style:

• Cross-functional Integration: Designers are expected to be embedded within product teams, working closely with PMs and Engineers to ensure seamless product development.

• Open Communication: Encouragement of open feedback loops, design critiques, and transparent discussions to ensure alignment and continuous improvement.

• Knowledge Sharing: A culture that values sharing insights, best practices, and learnings across the design and product organization.

📝 Enhancement Note: T-Mobile's "Un-carrier" culture likely translates to a dynamic and forward-thinking work environment. The emphasis on collaboration and user-centricity suggests a team that values both individual contribution and collective success.

⚡ Challenges & Growth Opportunities

Challenges:

• Complexity of Enterprise Software: Designing for complex enterprise advertising platforms requires balancing numerous features, user roles, and business logic while maintaining usability.

• Balancing Stakeholder Needs: Navigating diverse requirements from product, engineering, sales, and business stakeholders to create cohesive and effective solutions.

• Rapidly Evolving Ad-Tech Landscape: Staying abreast of industry trends, new technologies, and competitive pressures in the digital advertising space.

• Ensuring Design Consistency: Maintaining a cohesive user experience across a growing product ecosystem, especially with contributions from various teams.

Learning & Development Opportunities:

• Advanced UX/Product Strategy: Opportunities to deepen expertise in areas like complex system design, user research methodologies, and product strategy.

• Industry Exposure: Gaining in-depth knowledge of the digital out-of-home advertising market and T-Mobile's unique position within it.

• Mentorship Programs: Access to senior design leaders for guidance and career development.

• Conferences & Training: Potential support for attending industry conferences (e.g., UXPA, IA Summit, industry-specific ad-tech events) and pursuing relevant certifications.

📝 Enhancement Note: This role offers significant opportunities to tackle complex design challenges within a high-growth area of T-Mobile, providing a strong foundation for career advancement in enterprise UX and product strategy.

💡 Interview Preparation

Strategy Questions:

• "Describe a time you had to balance conflicting requirements from product, engineering, and business stakeholders. How did you arrive at a design solution?" (Prepare a case study demonstrating negotiation and compromise.)

• "How do you approach user research for a complex enterprise product? Walk us through a recent research project and how its findings influenced your design." (Focus on your independent research capabilities and data-driven iteration.)

Company & Culture Questions:

• "What do you know about T-Mobile's advertising solutions (T-Ads) and the DOOH market?" (Research their business, competitors, and the role of data in ad-tech.)

• "How do you contribute to a design system and ensure consistency across a product ecosystem?" (Highlight your experience with design systems and pattern libraries.)

Portfolio Presentation Strategy:

• Structure Your Narrative: For each case study, clearly outline the problem, your role, your process, key decisions, and the outcome/impact. Use a consistent structure.

• Highlight Your Process: Don't just show final screens; explain why you made certain choices, referencing user research, business goals, and technical constraints.

• Quantify Impact: Whenever possible, use data and metrics to demonstrate the success of your designs (e.g., increased conversion rates, reduced task completion time, improved user satisfaction scores).

• Engage Your Audience: Be prepared to answer questions thoughtfully and discuss your design reasoning in detail. Make it a conversation, not just a presentation.

📝 Enhancement Note: Candidates should be ready to demonstrate not only their design skills but also their strategic thinking, problem-solving abilities, and capacity for effective collaboration within a complex enterprise environment.

📌 Application Steps

To apply for this Senior Product Designer position:

• Submit your application through the T-Mobile careers portal, ensuring your resume and portfolio are up-to-date and prominently feature relevant experience.

• Portfolio Customization: Tailor your portfolio to highlight enterprise software design, user research methodologies, and contributions to design systems. Select case studies that best align with the responsibilities outlined for T-Ads.

• Resume Optimization: Ensure your resume clearly articulates your years of experience, specific skills (UX, research, design systems), and achievements using keywords from the job description (e.g., end-to-end design, user flows, wireframes, prototypes, user research, design systems).

• Interview Preparation: Practice articulating your design process, decision-making, and the impact of your work. Prepare specific examples for behavioral questions related to collaboration, problem-solving, and stakeholder management.

• Company Research: Thoroughly research T-Mobile, its advertising solutions division (T-Ads), the DOOH market, and T-Mobile's "Un-carrier" culture to demonstrate your genuine interest and understanding of their business context.

⚠️ Important Notice: This enhanced job description includes AI-generated insights and operations industry-standard assumptions. All details should be verified directly with the hiring organization before making application decisions.