New

Summer 2026 Quality Engineering Internship

T-MOBILE USA, Inc.
relocation assistance
United States, Pennsylvania, Philadelphia
21 South 11th Street (Show on map)
Feb 13, 2026
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 We're a team of innovators building the world's largest marketplace for digital out-of-home (DOOH) transactions, powering the programmatic revolution across billboards, transit screens, and other digital displays. Our platform sits at the core of how advertisers and media owners transact at scale, making data accuracy and reliability mission-critical. The Data Engineering team works hands-on with a modern data platform and tooling that supports both demand and supply-side marketplace experiences. Through high-quality data pipelines and validation, our work directly enables trusted insights, real-time decision-making, and measurable impact across T-Mobile's digital advertising ecosystem. What You'll Do As a Data Engineering Intern, you'll design and build a comprehensive data validation and monitoring suite for our DOOH platforms using SQL and Python. You'll implement automated checks for schema integrity, data freshness, and anomaly detection across Snowflake and AWS services including S3, Redshift, and RDS. By embedding these validations directly into ETL pipelines, your work will help minimize data downtime and improve the reliability of real-time advertising metrics. Your contributions will enable the team to move from reactive issue resolution to proactive data observability, ensuring stakeholders always have access to trusted, high-fidelity datasets. Key Responsibilities Write unit and integration tests for SQL- and Python-based ETL pipelines to harden data workflows Develop monitoring and alerting for data volume changes, freshness issues, and distribution anomalies Validate data transformations by comparing source systems (e.g., RDS) to analytical targets (e.g., Snowflake, Redshift) Automate data quality checks using Python and SQL within existing data pipelines Create and maintain documentation that serves as a source of truth for data lineage, schemas, and business logic What It Takes Currently pursuing a degree in Computer Science, Data Engineering, Software Engineering, or a related technical field Strong SQL skills, including experience with CTEs, window functions, and complex joins across datasets Proficiency in Python for data manipulation using libraries such as Pandas or PySpark Familiarity with data quality or observability frameworks such as Great Expectations, Soda, or Deequ (preferred) Basic understanding of cloud data ecosystems, including AWS S3 and the differences between relational (RDS) and analytical (Snowflake/Redshift) databases Experience using Git/GitHub, including submitting pull requests and participating in basic CI/CD workflows Minimum Qualifications At least 18 years of age Legally authorized to work in the United States Must be actively enrolled in a Bachelor's degree program Employees of T-Mobile or Metro by T-Mobile are ineligible for Internships 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. Never stop growing! As part of the T-Mobile team, you know the Un-carrier doesn't have a corporate ladder-it's more like a jungle gym of possibilities! We love helping our employees grow in their careers, because it's that shared drive to aim high that drives our business and our culture forward. By applying for this career opportunity, you're living our values while investing in your career growth-and we applaud it. You're unstoppable! T-Mobile USA, Inc. is an Equal Opportunity Employer. All decisions concerning the employment relationship will be made without regard to age, race, ethnicity, color, religion, creed, sex, sexual orientation, gender identity or expression, national origin, religious affiliation, marital status, citizenship status, veteran status, the presence of any physical or mental disability, or any other status or characteristic protected by federal, state, or local law. Discrimination, retaliation or harassment based upon any of these factors is wholly inconsistent with how we do business and will not be tolerated. Talent comes in all forms at the Un-carrier. If you are an individual with a disability and need reasonable accommodation at any point in the application or interview process, please let us know by emailing ApplicantAccommodation@t-mobile.com or calling 1-844-873-9500. Please note, this contact channel is not a means to apply for or inquire about a position and we are unable to respond to non-accommodation related requests.