Summer 2025 Voice Core Design Internship

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 a 12-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

The Voice Core design team is responsible for network design and architecture of voice services in the network. The intern will be responsible to contribute in typical voice design related project to take them thought software life cycle and through the journey to achieve key milestones.

Assigned Senior Engineer will work to help guide through the process and be a mentor to the intern for their time at T-Mobile.

What You’ll Do

The Voice Core Design Intern will develop an understanding of the attributes to evolve technical Telecom network and services architecture, design strategies to maintain, enhance, and evolve the T-Mobile Technology portfolio.

You will work with Senior Engineers to understand the technical requirements of the job and using those skills on a special project.

Through the project, you will be responsible for the design, coding (if required), testing and presentations to upper management.

Key Responsibilities

Build, identify, and maintain system requirements

Work with vendors to identify key functional requirements

Assist with the quality assurance testing of key functionality

Develop required data queries, scripts, etc. to accomplish the required need

Document design through Confluence and build presentations to review with leadership

Interact with cross functional teams with other Design teams, Quality Assurance, and Operations teams.

Responsible for other duties / projects as assigned by leadership.

What It Takes

Ability to learn and gain an understanding of the T-Mobile voice core network

Ability to learn and understand Session Initiation Protocol (SIP)

Excellent communication skills

Should understand basic telecommunications, wireless communications

Able work on databases such as SQL and be able to apply knowledge to new systems

Minimum Qualifications

At least 18 years of age

Legally authorized to work in the United States

Must have graduated within the last 12-months, OR 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.

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

Intern wages range from $20 / hour to $40 / hour. The successful candidate’s actual pay will be based on experience / location.

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 -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.