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 / UX / GTM Operations

Date Posted: May 26, 2026

Experience Level: 5-10 Years

Remote Status: On-site

🚀 Role Summary

• Drive the end-to-end design lifecycle for enterprise software powering T-Mobile Advertising Solutions (T-Ads), a digital out-of-home advertising marketplace.

• Translate complex user needs and business objectives into intuitive, consistent, and user-centric product experiences.

• Collaborate closely with Product Managers, Engineers, and business stakeholders to refine requirements and ensure technical feasibility of design solutions.

• Contribute significantly to the evolution and maintenance of the T-Ads design system, pattern libraries, and design principles to ensure product consistency.

📝 Enhancement Note: While the title is "Senior Product Designer," the description emphasizes an operations-adjacent role within the GTM Advertising Solutions division. This role requires a strong understanding of enterprise software, user research, and cross-functional collaboration, aligning closely with operational efficiency and user adoption goals. The focus on "powering the marketplace" and "advancing business outcomes" indicates a strategic, operations-minded approach to design.

📈 Primary Responsibilities

• Lead the complete design lifecycle from discovery and user research through to high-fidelity prototypes and final design specifications, with minimal oversight.

• Develop comprehensive user flows, wireframes, and interactive prototypes to effectively communicate user experience concepts and interaction models.

• Conduct independent qualitative and quantitative user research, engaging regularly with both internal and external users to identify pain points and validate design solutions.

• Collaborate with Product Management and Engineering teams to negotiate and refine product requirements, ensuring a balance between customer needs, business goals, and technical feasibility.

• Contribute to and actively evolve the T-Ads design system, including its principles, guidelines, and pattern libraries, to maintain a consistent and cohesive user experience across the entire product ecosystem.

• Support other business initiatives and projects as assigned by management, demonstrating flexibility and a proactive approach to evolving business needs.

📝 Enhancement Note: The responsibilities highlight a senior-level ownership of the design process, including strategic research and cross-functional negotiation, which are critical for operationalizing product vision and ensuring successful GTM execution.

🎓 Skills & Qualifications

Education:

• Bachelor's Degree in User Experience (UX), Human-Computer Interaction (HCI), Computer Science, Engineering, or a closely related field (Required).

Experience:

• 4-7 years of progressive, related working experience in product design or UX roles (Required).

• Demonstrated experience in leading the end-to-end design lifecycle for complex software products.

• Proven track record of conducting independent user research (qualitative and quantitative) and translating insights into actionable design improvements.

• Experience contributing to and maintaining design systems, pattern libraries, and style guides (Required).

Required Skills:

• User Experience Design: Comprehensive expertise in end-to-end design processes, including discovery, information architecture (IA), interaction design, and visual design.

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

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

• User Research: Proven ability to independently plan, execute, and analyze both qualitative and quantitative user research studies.

• Design Systems & UI Frameworks: Experience in contributing to and maintaining design systems and pattern libraries, with a working knowledge of common UI frameworks and front-end development constraints.

Preferred Skills:

• Experience designing for enterprise software or advertising technology platforms.

• Proficiency in advanced prototyping tools for complex interaction design and user flow simulations.

• Familiarity with agile development methodologies and cross-functional team collaboration within such frameworks.

• Understanding of data analysis and how to integrate quantitative insights into design decisions.

📝 Enhancement Note: The requirements emphasize a blend of deep design craft with strong collaboration and research skills, essential for a role that bridges user needs with business objectives in an operational context. The explicit requirement for a portfolio underscores the need to demonstrate practical application of these skills.

📊 Process & Systems Portfolio Requirements

Portfolio Essentials:

• End-to-End Case Studies: Showcase 2-3 comprehensive case studies detailing your process from initial problem definition through to final design solutions, highlighting your role and contributions at each stage.

• User Research Integration: Demonstrate how you've used qualitative and quantitative research to inform design decisions, including examples of research plans, methodologies, and the impact of findings on the final product.

• Design System Contributions: Provide examples of your work on design systems, pattern libraries, or style guides, illustrating how you've contributed to consistency and scalability in product design.

• Problem-Solving & Impact: Clearly articulate the business or user problems you addressed with your designs and quantify the impact or outcomes achieved (e.g., improved conversion rates, reduced support tickets, increased user adoption).

Process Documentation:

• Workflow Design & Optimization: Examples of how you map out user journeys, information architecture, and interaction flows to optimize user workflows within complex systems.

• Prototyping & Validation: Showcase your ability to create interactive prototypes at various fidelities for user testing and stakeholder feedback, demonstrating a process for iterative refinement.

• Cross-Functional Collaboration: Illustrate how you document and communicate design specifications, rationale, and requirements to engineering teams to ensure accurate implementation.

📝 Enhancement Note: For a senior design role, particularly one supporting enterprise software and advertising solutions, a portfolio must go beyond aesthetics. It needs to demonstrate strategic thinking, research rigor, and the ability to drive operational efficiency through design.

💵 Compensation & Benefits

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

Benefits:

• Comprehensive Health Coverage: Medical, dental, and vision insurance plans.

• Financial Wellness: Flexible Spending Account, 401(k) with company match, employee stock grants, and employee stock purchase plan.

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

• Family Support: Paid parental and family leave, family building benefits, back-up care, enhanced family support, and childcare subsidies.

• Professional Development: Tuition assistance, college coaching, and continuous learning opportunities.

• Income Protection: Short-term and long-term disability insurance, voluntary AD&D, accident, life, and voluntary disability insurance.

• Additional Perks: Mobile service & home internet discounts, pet insurance, and commuter/transit programs.

Working Hours: 40 hours per week. While standard hours are expected, flexibility may be available based on project needs and team collaboration requirements, typical for senior roles in fast-paced environments.

📝 Enhancement Note: The salary range is based on the provided input. The extensive list of benefits highlights T-Mobile's commitment to employee well-being and financial security, which is a significant draw for experienced professionals.

🎯 Team & Company Context

🏢 Company Culture

Industry: Telecommunications & Advertising Technology. T-Mobile operates in the highly competitive telecommunications industry and is expanding its advertising solutions through T-Ads, leveraging its vast customer data and digital out-of-home (DOOH) network. This dual focus creates a dynamic environment where innovation is key.

Company Size: Large Enterprise (T-Mobile is a major global corporation with tens of thousands of employees). This size offers stability, extensive resources, and opportunities for broad impact, but may also involve navigating larger organizational structures.

Founded: T-Mobile USA's origins trace back to the 1990s, with significant evolution through mergers and acquisitions. T-Mobile Advertising Solutions (T-Ads) represents a more recent strategic expansion into a growing market.

Team Structure:

• Product Design Team: Likely a dedicated team within T-Ads or a broader Product organization, reporting to a Head of Product Design. This team will include other Product Designers, UX Researchers, and potentially UI Specialists.

• Reporting Structure: The Senior Product Designer reports to the Head of Product Design, indicating a clear leadership path and mentorship opportunities.

• Cross-functional Collaboration: Close partnerships are expected with Product Managers, Software Engineers, Data Analysts, Marketing teams, and Sales representatives, particularly within the T-Ads division.

Methodology:

• Data-Driven Design: Emphasis on leveraging user research (qualitative and quantitative) and product performance data to inform design decisions and measure impact.

• Agile & Iterative Development: Likely operates within an agile framework, requiring rapid iteration, continuous feedback, and close collaboration with engineering teams to deliver value incrementally.

• Design System Centricity: A strong focus on building and maintaining a robust design system to ensure consistency, efficiency, and scalability across the T-Ads product portfolio.

Company Website: https://www.t-mobile.com/ (General T-Mobile) and potentially a dedicated T-Ads portal or section.

📝 Enhancement Note: The context of T-Mobile Advertising Solutions suggests a fast-paced, innovative environment focused on leveraging data and technology to drive advertising revenue. This requires designers to be strategic, adaptable, and business-aware.

📈 Career & Growth Analysis

Operations Career Level: Senior Individual Contributor. This role sits at a senior level within the design function, expected to operate with significant autonomy and provide strategic direction. It's a critical role for enabling the operational success of the T-Ads platform by ensuring its usability and effectiveness.

Reporting Structure: Reports to the Head of Product Design, indicating a direct line to design leadership and potential for mentorship from experienced professionals. This structure allows for clear strategic alignment and feedback.

Operations Impact: The Senior Product Designer's work directly impacts the operational efficiency and revenue generation of the T-Ads marketplace. By creating intuitive and effective tools for advertisers and partners, the designer contributes to increased platform adoption, campaign success, and ultimately, T-Mobile's advertising revenue.

Growth Opportunities:

• Design Leadership: Potential to grow into a Lead Product Designer or Design Manager role within T-Ads or other T-Mobile product divisions, overseeing teams and strategic design initiatives.

• Specialization: Opportunity to deepen expertise in specific areas such as advertising technology, enterprise SaaS design, data visualization, or design systems.

• Cross-Functional Mobility: Potential to move into Product Management or GTM strategy roles, leveraging a deep understanding of user needs and product development gained through this design position.

• Mentorship & Training: Access to T-Mobile's extensive learning and development programs, including tuition assistance and college coaching, to support continuous skill enhancement.

📝 Enhancement Note: This role offers a strong foundation for a career in product design, with clear pathways for advancement within T-Mobile's expansive organization, particularly in specialized or leadership capacities within the growing advertising technology sector.

🌐 Work Environment

Office Type: Primarily on-site within T-Mobile's corporate offices in Philadelphia or New York. This environment supports in-person collaboration, spontaneous ideation, and team cohesion.

Office Location(s):

• Philadelphia, PA Center City E-Suite

• New York, NY

These locations offer access to major business hubs, public transportation, and amenities.

Workspace Context:

• Collaborative Spaces: Offices are likely equipped with meeting rooms, brainstorming areas, and open-plan workspaces designed to foster interaction and teamwork.

• Technology Access: Provision of standard design hardware (e.g., high-performance laptops) and software access, including the necessary design and prototyping tools, as well as enterprise communication platforms.

• Team Interaction: Frequent opportunities for direct interaction with product managers, engineers, researchers, and other stakeholders, facilitating a fluid exchange of ideas and feedback essential for iterative design processes.

Work Schedule: Standard 40-hour work week, with potential for some flexibility depending on project timelines and team needs. The on-site nature promotes integrated team participation during core business hours.

📝 Enhancement Note: The on-site requirement suggests a preference for a highly collaborative and integrated team environment, which is often beneficial for complex product development cycles in enterprise settings.

📄 Application & Portfolio Review Process

Interview Process:

• Initial Screening: HR or Recruiter call to assess basic qualifications, interest, and cultural fit.

• Portfolio Review & Design Challenge: A session with the hiring manager and/or design lead to present your portfolio, discuss your design process, and potentially tackle a relevant design problem or case study. This stage heavily evaluates your strategic thinking and problem-solving skills.

• Cross-functional Interviews: Meetings with Product Managers, Engineers, and potentially other stakeholders to assess collaboration style, communication effectiveness, and ability to work within a team environment.

• Final Interview: Typically with a Director or VP level leader to discuss strategic alignment, long-term vision, and overall suitability for the senior role.

Portfolio Review Tips:

• Tell a Story: Structure your case studies to narrate a problem, your process, your specific contributions, the challenges faced, and the measurable outcomes.

• Show, Don't Just Tell: Use visuals (wireframes, prototypes, final designs, user flows) extensively to illustrate your design decisions and process.

• Quantify Impact: Whenever possible, include metrics and data that demonstrate the success or impact of your designs on users and business objectives.

• Highlight Seniority: Emphasize your strategic thinking, leadership in design direction, and ability to work autonomously and mentor others.

• Tailor to T-Ads: If possible, include examples that show an understanding of enterprise software, advertising technology, or complex data-driven platforms.

Challenge Preparation:

• Understand the Domain: Research T-Mobile Advertising Solutions (T-Ads), the DOOH advertising market, and the types of enterprise tools used in this space.

• Problem-Solving Framework: Prepare to articulate your approach to solving ambiguous problems, focusing on user needs, business goals, and technical constraints.

• Design Thinking: Be ready to walk through your design thinking process, from empathy and definition to ideation, prototyping, and testing.

• Communication: Practice presenting your ideas clearly and concisely, and be prepared to answer questions about your rationale and trade-offs.

📝 Enhancement Note: The emphasis on a portfolio and potential design challenge indicates that practical application of design skills and strategic problem-solving are paramount for this role.

🛠 Tools & Technology Stack

Primary Tools:

• Design & Prototyping: Proficiency in industry-standard tools such as Figma, Sketch, Adobe XD, InVision, or similar for wireframing, prototyping, and high-fidelity design. Figma is increasingly becoming a standard for collaborative design.

• User Research Tools: Experience with tools for usability testing, surveys, and analytics (e.g., UserTesting.com, Lookback, SurveyMonkey, Google Analytics, Amplitude).

• Collaboration Platforms: Familiarity with tools like Slack, Microsoft Teams, Jira, Confluence for team communication, project tracking, and documentation.

Analytics & Reporting:

• Data Visualization: Ability to interpret and potentially contribute to dashboards using tools like Tableau, Power BI, or internal reporting systems to understand user behavior and product performance.

• Product Analytics: Experience with platforms like Google Analytics, Amplitude, Mixpanel to track user engagement and identify areas for design improvement.

CRM & Automation:

• While not a direct CRM role, understanding how enterprise software integrates with CRM systems (e.g., Salesforce) or advertising platforms is beneficial for context.

• Familiarity with project management and workflow automation tools (e.g., Jira, Asana) used by engineering and product teams.

📝 Enhancement Note: A strong command of modern design and prototyping tools, coupled with an understanding of how to leverage user data and collaborate within agile development environments, is expected.

👥 Team Culture & Values

Operations Values:

• Customer-Centricity: A deep commitment to understanding and serving the needs of users (advertisers, partners) to drive platform adoption and success.

• Collaboration & Transparency: A belief in open communication, shared ownership, and working closely with cross-functional teams to achieve common goals.

• Innovation & Agility: A drive to explore new ideas, adapt quickly to market changes, and iterate on solutions to deliver value rapidly.

• Data-Driven Decision Making: A reliance on insights from user research and performance data to guide design choices and measure impact.

• Excellence & Accountability: A commitment to high-quality work, taking ownership of designs, and delivering impactful results.

Collaboration Style:

• Partnership-Oriented: Works closely with Product Managers to define strategy and requirements, and with Engineers to ensure feasibility and effective implementation.

• Feedback-Rich: Actively seeks and provides constructive feedback within the design team and with cross-functional partners to refine designs.

• Solution-Focused: Emphasizes finding practical, effective solutions to user and business challenges, rather than focusing solely on the process.

• Cross-Functional Integration: Engages with various departments (Sales, Marketing) to gain a holistic understanding of the business and user landscape.

📝 Enhancement Note: T-Mobile's "Un-carrier" culture emphasizes innovation, customer focus, and teamwork, which likely extends to its advertising solutions division. This role requires someone who thrives in a dynamic, collaborative, and results-oriented environment.

⚡ Challenges & Growth Opportunities

Challenges:

• Balancing Stakeholder Needs: Navigating competing priorities from product management, engineering, sales, and business stakeholders to deliver designs that satisfy multiple objectives.

• Scaling Design Systems: Ensuring the design system remains robust, scalable, and adopted across a growing product suite and potentially evolving team.

• Complex Enterprise Domain: Designing for a sophisticated B2B advertising marketplace requires a deep understanding of industry nuances, technical constraints, and user workflows.

• Fast-Paced Environment: Adapting to T-Mobile's dynamic culture and the rapid pace of innovation in the advertising technology sector.

Learning & Development Opportunities:

• Industry Expertise: Gaining deep knowledge of the digital out-of-home advertising ecosystem and enterprise SaaS design best practices.

• Advanced Design Skills: Opportunities to hone skills in areas like complex interaction design, data visualization, and advanced prototyping.

• Leadership Development: Potential to mentor junior designers and contribute to design strategy, preparing for future leadership roles.

• Formal Training: Access to T-Mobile's extensive training programs, including tuition assistance and coaching, for continuous professional growth.

📝 Enhancement Note: This role presents significant opportunities for growth by tackling complex design challenges within a major industry player, with ample support for professional development.

💡 Interview Preparation

Strategy Questions:

• "Describe a time you had to balance competing stakeholder requirements for a product feature. How did you approach it, and what was the outcome?" (Focus on negotiation, communication, and problem-solving).

• "How do you approach designing for a complex enterprise system where users have specialized knowledge? Walk us through your process for understanding their needs." (Highlight user research, IA, and workflow mapping).

Company & Culture Questions:

• "What do you know about T-Mobile Advertising Solutions and the DOOH advertising market? How do you see design contributing to success in this space?" (Research T-Ads, its market position, and competitors).

• "How do you prefer to collaborate with product managers and engineers? Describe a challenging cross-functional collaboration and how you navigated it." (Focus on communication, empathy, and teamwork).