Senior AI Engineer: Architect Agentic AI at Scale

T-Mobile US Inc. in Frisco, TX is seeking a Senior AI Engineer to architect and optimize agentic AI systems for customer service, coordinating across models, internal APIs, and third-party tools to deliver reliable, production-grade workflows and intuitive customer interactions. You will use prompt engineering, model fine-tuning, evaluation frameworks, and system-level orchestration to improve accuracy, reliability, and reasoning across millions of customer conversations in a cloud-native,

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