AI Prompt Engineer Intern: Craft Brighter Customer AI

T-Mobile; Bellevue (WA); On-site; USD 37,000 - 69,000; Full time

Benefits offered by this job

Relocation assistance

Job summary

T-Mobile USA, Inc. invites you to join an 11-week paid internship that gives you real work, not busywork.

You’ll help shape AI-powered customer experiences by crafting prompts for chat and voice bots and collaborating with product, engineering, and business teams under mentor guidance. You’ll write, test, and refine prompts, build a documented prompt library, and present results to leadership with impact on the customer experience.

Qualifications

• Hands-on experience prompting LLMs such as Claude, ChatGPT, or Copilot through coursework, projects, or prior roles.
• Strong written communication skills, with attention to detail and the ability to write clear, precise instructions.
• An analytical mindset, with comfort evaluating outputs and iterating based on data.
• Curiosity, urgency, and a desire to learn quickly on the job and build a career in consumer AI.
• A plus: familiarity with few-shot examples, chain-of-thought, and system prompts.
• A plus: experience with Excel, SQL, or Agile tools such as Jira.

Responsibilities

• Design, write, test, and iterate on prompts for conversational AI use cases such as chat and voice bots
• Build and maintain a documented prompt library with versioning, best practices, and results
• Evaluate prompt performance with structured testing and side-by-side comparisons, and recommend improvements to accuracy, tone, and containment
• Create prompts and workflows that help 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

Skills

LLM prompting

Written comms

Analytical mindset

Curiosity/learn fast

Excel/Jira familiarity

Tools

Excel

SQL

Jira

Job description

T-Mobile USA, Inc. invites you to join an 11-week paid internship that gives you real work, not busywork.

You’ll help shape AI-powered customer experiences by crafting prompts for chat and voice bots and collaborating with product, engineering, and business teams under mentor guidance. You’ll write, test, and refine prompts, build a documented prompt library, and present results to leadership with impact on the customer experience.