Sr AI Engineer

T-Mobile

Actively hiring Posted this week
Bellevue, WA Posted 3 days ago $133,100–$240,100 / year
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At a glance

AI generated

TL;DR

As a Senior AI Engineer at T-Mobile’s IntentCX team, you will lead the development and optimization of advanced AI models that enhance customer service automation. Your daily tasks include fine-tuning large language models (LLMs) using prompt engineering and reinforcement learning to improve model outputs, implementing retrieval-augmented generation techniques for contextually accurate responses, and building agentic AI systems capable of invoking internal and third-party tools via APIs. You will collaborate with cross-functional teams to integrate these innovations into production environments, ensuring seamless data flow and high performance. Proficiency in Python, experience with frameworks like Hugging Face, and familiarity with operational excellence practices are essential, as is a deep understanding of LLM advancements and AI orchestration tools such as LangChain and Agent SDK. This role demands expertise in scaling AI solutions to address complex business challenges at T-Mobile’s scale.

Skills

Python LLM Prompt Engineering Fine-Tuning Reinforcement Learning RAG APIs MCP Agent SDK LangChain LlamaIndex Hugging Face OpenAI APIs Anthropic Claude Google Gemini Vector Databases Jira Azure DevOps Weights & Biases Splunk Datadog

What you'll do

  • Builds agentic AI systems to invoke internal and third-party tools using APIs in production environments.
  • Optimizes performance of AI models through prompt engineering, fine-tuning, and reinforcement learning with customer data.
  • Develops AI tools and workflows for structured reasoning, multi-step task execution, and improved contextual memory.
  • Implements retrieval-augmented generation (RAG) techniques to ensure contextually accurate AI responses grounded in real-time data.
  • Tracks success metrics and continuously evaluates model quality based on business requirements.

What we're looking for

  • 4+ years of experience developing and deploying machine learning models for AI-driven customer service automation.
  • Proficient in advanced AI techniques including prompt engineering, fine-tuning, and creating AI tools and workflows.
  • Strong collaboration skills with cross-functional teams to integrate AI systems into production environments.
  • Expertise in Python and AI development frameworks for scalable application building.
  • Experience with operational excellence practices and observability tools for monitoring AI systems in production.
  • Familiarity with LLM fine-tuning, prompt engineering, and function calling protocols like MCP and AI orchestration frameworks.
  • Knowledge of RAG pipelines and vector database retrieval for enhancing AI responses.

Employer

About T-Mobile

T-Mobile US is the second-largest wireless carrier in the United States, providing wireless voice, messaging, and data services under the T-Mobile and Metro by T-Mobile brands. Industry: Wireless Telecommunications

T-Mobile currently has 13 open roles on FindRole.

Listed pay typically runs $113,600–$191,100 across 13 roles with salary data.

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