Summer 2027 Quality Engineering Internship

T-Mobile USA; Philadelphia (Philadelphia County); On-site; USD 37,000 - 69,000; Full time

Job summary

T-Mobile USA invites you to join the Quality Engineering Intern program within Vistar Media (T-Mobile Ads). This 11-week paid internship gives you hands-on work, real projects, and mentorship while you grow skills that matter.

You'll develop and maintain automated tests using Cypress and TypeScript, collaborate with Engineering, Product, and Business teams, and gain exposure to modern testing practices while contributing to a platform that powers digital advertising.

Qualifications

• Foundational programming knowledge and exposure to common languages.
• Strong analytical and problem-solving abilities with attention to detail.
• Excellent communication and collaboration skills with a proactive mindset.

Responsibilities

• Build and maintain automated tests with Cypress and TypeScript for key DOOH workflows.
• Collaborate with Quality Engineering, Software Engineering, Product, and Business teams to understand requirements and expand test coverage.
• Run manual and automated tests to identify and document defects throughout the lifecycle.
• Participate in refinement sessions and team discussions to learn real-world software engineering practices.
• Drive improvements in test automation, regression testing, and overall software quality.

Skills

Programming basics

Analytical thinking

Communication

Collaboration

Ownership

Growth mindset

Education

Pursuing Bachelor's or Graduate degree

Tools

Cypress

TypeScript

Git

Job description

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.

T-Mobile didn't become a leader by following the playbook. We got here by breaking it. We're a disruptor that now plays on a higher tier, and we're still raising the bar for millions of customers nationwide. If you want to work somewhere that sets the standard instead of matching it, this is your place.

This is an 11-week paid learning experience where you'll do real work, not busywork. You'll build relationships with other interns and leaders across the company, and you'll be paired with mentors who will challenge you to grow skills that matter. We'll give you hands-on projects with real stakes, and we expect your creativity and sharp ideas to make an immediate impact. You'll work alongside T-Mobile employees who have your back and who still believe the best ideas can come from anyone.

What It's Like

Our Quality Engineering team sits within Vistar Media (T-Mobile Ads). We are small enough that your work gets seen and big enough that it matters. We partner closely with Engineering, Product, and Business teams to validate new features, catch defects early, and deliver a seamless experience for our customers. A typical week mixes hands-on test development, collaboration with engineers, and team discussions where your questions and ideas carry weight. You don't need a background in advertising or QA frameworks. You need curiosity, a growth mindset, and a drive to learn.

What You'll Do

As a Quality Engineering Intern (SDET), you'll develop and maintain automated tests for key workflows on T-Ads Digital Out-of-Home (DOOH) advertising platform. You'll use modern tools such as Cypress and TypeScript while learning testing best practices, debugging techniques, and how automation fits into the software development lifecycle. Your work will reduce manual testing effort, catch defects sooner, and build confidence in a platform that powers digital advertising, helping T-Mobile stay ahead.

Key Responsibilities

• Build and maintain automated tests with Cypress and TypeScript to validate key workflows on the DOOH advertising platform.
• Partner with Quality Engineering, Software Engineering, Product, and Business teams to understand requirements, identify test scenarios, and expand test coverage.
• Run manual and automated tests to find, document, and troubleshoot defects throughout the development lifecycle.
• Join refinement sessions and team discussions to gain exposure to real-world software engineering practices.
• Drive improvements in test automation, regression testing, and overall software quality while learning modern testing methodologies.

What It Takes

Foundational programming knowledge, with exposure to JavaScript, TypeScript, Python, or Java through coursework, personal projects, or internships.

Familiarity with software development fundamentals, including object-oriented programming, data structures, debugging, and version control tools such as Git.

Basic understanding of software testing concepts, REST APIs, or Agile methodologies is a plus. Prior experience with test automation frameworks is not required.

Strong analytical and problem-solving skills, attention to detail, and a willingness to challenge assumptions and learn new technologies quickly.

Excellent communication and collaboration skills, with the initiative to take ownership of assigned projects and move with urgency.

Hands-on experience through academic projects, personal coding projects, or GitHub contributions is highly valued. Professional experience and certifications are not required.

Minimum Qualifications

At least 18 years of age

Legally authorized to work in the United States now and in the future

Must have one or more course(s) remaining in a Bachelors or Graduate degree program post internship

Employees of T-Mobile or Metro by T-Mobile are ineligible for external Summer Internships, please see Magenta Accelerator if interested

Relocation assistance will be provided to program participants who reside more than 50 miles from the internship location.

Intern wages range from $27/hour to $50/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.