Summer 2026 Associate Software Engineer Internship

T-Mobile • Philadelphia, PA

1d • $26 - $47

About The Position

T-Mobile is synonymous with innovation–and you could be part of the team that disrupted an entire industry! We reinvented customer service, brought real 5G to the nation, and now we’re shaping the future of technology in wireless and beyond. Our work is as exciting as it is rewarding, so consider the career opportunity below as your invitation to grow with us, make big things happen with us, above all, #BEYOU with us. Together, we won’t stop! Get hands-on experience, training—and a leg up on a bright future. Learn. Achieve. Build a career. T-Mobile is revolutionizing the wireless industry for millions of customers nationwide. Working here means rolling up your sleeves and redefining the status quo with a team that has your back every step of the way! This is an 11-week paid learning experience during which you’ll be able to connect and network with other interns and leaders within the company. We invite you to come innovate with mentors who will challenge you to develop meaningful skills. You’ll contribute your creativity and outstanding ideas, while working alongside T-Mobile employees. We’ll give you hands-on projects and the chance to create an immediate impact. What It’s Like As a Software Engineering Intern on the T-Ads platform team, you’ll help build the next generation of media playback technology used across T-Mobile’s advertising ecosystem. Our team develops a cross-platform player that delivers consistent, high-performance playback on Android, Linux, and Windows devices deployed in real-world public environments. You’ll work closely with experienced engineers in an Agile environment, contributing to a modern, greenfield codebase that integrates with existing backend services. Your work will directly impact how customers experience T-Mobile advertising at scale. What You’ll Do Throughout the summer, you’ll contribute to the development of a next-generation media player by implementing new features and porting functionality from a legacy system. You’ll test and validate your work across a wide variety of hardware configurations in our lab environment. You’ll collaborate with engineers, product partners, and designers to ensure performance, reliability, and usability. Your contributions will help accelerate time-to-market for a critical platform used across customer-managed deployments.

Requirements

• Rising junior or senior pursuing a degree in Computer Science, Software Engineering, or a related field
• Familiarity with Kotlin, Android development, or strong interest in learning both
• Experience with at least one modern programming language (e.g., Kotlin, Java, TypeScript, or Python)
• Basic understanding of software development fundamentals, data structures, and algorithms
• Exposure to version control systems such as Git
• Strong problem-solving skills, curiosity, and a willingness to learn in a fast-paced environment
• At least 18 years of age
• Legally authorized to work in the United States
• Must be actively enrolled in a Bachelors or Graduate degree program
• Employees of T-Mobile or Metro by T-Mobile are ineligible for Internships
• Employer does not sponsor work visas for this position. Note that this also applies to individuals who are students in F-1 status who desire sponsorship after they complete their education.

Nice To Haves

• Interest in distributed systems, IoT, or cross-platform development is a plus

Responsibilities

• Collaborate with the team through daily standups, sprint planning, and retrospectives
• Design, implement, test, and debug features in a greenfield codebase using Kotlin Multiplatform
• Contribute to defining and enforcing operating schedules for individual players or networks of players
• Test software on diverse hardware platforms to ensure reliability and performance
• Participate in code reviews and follow best practices for quality and maintainability

Benefits

• Relocation assistance may be provided to program participants who reside more than 50 miles from the internship location.
• Intern wages range from $26/hour to $47/hour.
• The successful candidate’s actual pay will be based on education/STEM vs non-STEM designation.

What This Job Offers

• Career Level: Intern