Summer 2026 Software Engineering Internship
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 Service Enablement, Automation & Least Cost Routing (SEAL) develops and operates backend platforms that integrate with third-party vendors as well as internal IT and Engineering systems. Core capabilities include value-added service life-cycle management, large-scale IoT provisioning, network audit automation, and least cost destination routing for international long distance voice traffic. Solutions are built to support high availability, regulatory compliance, and operational efficiency across complex network environments. Engineering efforts focus on scalable service design, workflow automation, and intelligent routing optimization to ensure cost-effective and reliable global connectivity. What You'll Do Software Engineering Intern position focused on backend service development and workflow automation using an AI-first engineering model. Emphasis placed on spec-driven development practices where large language models generate code from structured requirements. Engineering effort centers on writing clear specifications, validating generated output, and hardening systems for production environments. Position designed for hands-on contribution to real backend systems under guidance from senior engineers.
Requirements
- Currently pursuing a Bachelor’s or Master’s degree in Computer Science, Software Engineering, Computer Engineering, or related technical field
- Strong foundation in data structures and object-oriented design
- Experience with Java or comparable object-oriented language
- Familiarity with RESTful API development
- Experience using Git for version control
- Understanding of unit and integration testing principles
- Prior use of AI tools for code generation, structured prompting, or specification-driven development
- Ability to translate functional requirements into structured technical specifications
- 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.
Responsibilities
- Design and implement backend services using Java and Spring Boot
- Build and automate engineering and operational workflows
- Generate production-ready code through structured, AI-driven specification workflows
- Review, validate, test, and refine AI-generated code
- Deploy services into Kubernetes environments
- Contribute to GitLab CI/CD pipelines and Argo deployment workflows
- Integrate services with Postgres and Cassandra data stores
- Collaborate within an agile engineering team
- Deliver maintainable, scalable, and well-tested backend solutions
Benefits
- Relocation assistance may be provided to program participants who reside more than 50 miles from the internship location.
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What This Job Offers
Career Level
Intern
