Summer 2026 AI Engineering 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 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 You'll Do

• Experiment with prompt engineering to improve AI response quality and accuracy
• Test different model configurations and parameters to optimize performance
• Help fine-tune models on T-Mobile's customer interaction data
• Develop tools and scripts that enhance how our AI models reason and complete tasks
• Work with retrieval-augmented generation (RAG) to help AI pull relevant information from our knowledge base
• Contribute to agentic AI systems that break down complex customer requests into manageable steps
• Create test cases and evaluation frameworks to measure AI performance
• Analyze real customer interaction data to identify areas for improvement
• Track metrics like intent detection accuracy and workflow completion rates
• Partner with engineers and designers to integrate AI improvements into production
• Document your experiments and share takeaways with the team
• Participate in code reviews and contribute to team discussions on AI architecture

Required:

• Currently pursuing a degree in Computer Science, Data Science, or related field (Junior or Senior preferred)
• Strong Python programming skills
• Experience working with APIs and understanding how they work
• Familiarity with machine learning concepts and frameworks
• Curiosity about LLMs and how they work (ChatGPT, Claude, etc.)
• Experience with LLM APIs (OpenAI, Anthropic, Hugging Face)
• Knowledge of prompt engineering or working with AI tools like LangChain
• Basic understanding of vector databases or RAG techniques
• Basic understanding of cloud platforms (AWS, GCP, Azure)

Skills That Matter

• Technical mentality: You like digging into why something works (or doesn't) and testing hypotheses
• Show your work: You build prototypes and demos rather than just talking about ideas
• Clear communication: You can explain technical concepts to non-technical teammates
• Self-starter: You're comfortable with ambiguity and can figure things out when the path isn't clear
• User focus: You think about the customer on the other end of the AI interaction
• Detail-oriented: Small improvements in prompts or configurations can make big differences

What You'll Get Out of This

• Hands-on experience building production AI systems at scale
• Exposure to the latest LLM technologies and techniques
• Mentorship from senior AI engineers
• Real impact—your work will affect how customers interact with T-Mobile
• A summer project you can actually talk about in interviews

This isn't a typical internship where you shadow someone or work on throwaway projects. You'll own real work, ship code to production, and see the results of what you build.

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.