About the role#
This is an 11-week paid internship for Summer 2027. You will join the team responsible for shaping T-Mobile's AI-powered customer experience, including virtual assistants and voice and chat bots. You will work on real projects, collaborate with product owners and engineers, and present your findings to leadership.
What you'll do#
- Design, write, test, and iterate on prompts for conversational AI use cases like chat and voice bots.
- Build and maintain a documented prompt library that includes versioning, best practices, and results.
- Evaluate prompt performance using structured testing and side-by-side comparisons to improve accuracy and tone.
- Create prompts and workflows to assist the team with research, documentation, and analysis.
- Partner with product, engineering, and business stakeholders to translate requirements into effective AI behavior.
- Present your prompt strategy and results to leadership.
What you'll need#
- Current enrollment in a Bachelor's or Graduate degree program in Computer Science, Data Science, Business Administration, or a related field, with at least one course remaining after the internship.
- Hands-on experience prompting LLMs like Claude, ChatGPT, or Copilot through coursework, projects, or previous roles.
- Strong written communication skills and the ability to write clear, precise instructions.
- An analytical mindset with the ability to evaluate outputs and iterate based on data.
- Curiosity and a desire to learn quickly in a consumer AI environment.
- At least 18 years of age and legal authorization to work in the United States.
- Familiarity with few-shot examples, chain-of-thought, and system prompts is a plus.
- Experience with Excel, SQL, or Agile tools like Jira is a plus.
Location & details#
- This role is based on-site in Bellevue, Washington.
- This is a full-time, paid internship position.
- Relocation assistance is provided for those residing more than 50 miles from the office.
About T-Mobile
T-Mobile is a telecommunications company based in Bellevue, Washington. It operates a 5G network that provides wireless services to consumers and businesses. The company manages several brands including Metro by T-Mobile and Mint Mobile. It functions as a public company with a workforce of over 10,000 employees.
How to get in at T-Mobile
Securing an internship at T-Mobile requires speed because early applicants often have their resumes reviewed before the volume of candidates becomes unmanageable. Intern Insider sends an instant alert the moment a role matching your target is published, which helps you apply among the first and get your profile seen before the pile grows. Reaching out to the right people often yields better results than submitting an application into a general queue. Intern Insider surfaces the recruiters behind T-Mobile roles so you can contact them directly to ask about the position or a referral, which materially improves your response rates.
