Sr AI Engineer

T-Mobile; Frisco (TX); On-site; USD 150,000 - 190,000; Full time

Job summary

T-Mobile in Frisco, TX is seeking a Senior AI Engineer to architect and optimize the agentic AI systems powering our customer interactions. You will design AI that coordinates across models, internal APIs, and third‑party tools to create reliable, production‑grade workflows and intuitive customer experiences.

Collaborating with engineering, product, and operations teams, you’ll apply prompt engineering, model fine-tuning, and evaluation frameworks to improve accuracy, reliability, and reasoning

Job description

At T-Mobile, we invest in YOU! Our Total Rewards Package ensures that employees get the same big love we give our customers. All team members receive a competitive base salary and compensation package - this is Total Rewards. Employees enjoy multiple wealth-building opportunities through our annual stock grant, employee stock purchase plan, 401(k), and access to free, year-round money coaches. That’s how we’re UNSTOPPABLE for our employees!

Engineer the intelligent core of T-Mobile’s next-generation customer experience.

We’re seeking a Senior AI Engineer to architect and optimize the agentic AI systems driving the evolution of customer service. You’ll design AI that performs with precision and coordinates across models, internal APIs, and third-party tools to create reliable, production-grade workflows and intuitive customer interactions.

Using advanced techniques such as prompt engineering, model fine-tuning, evaluation frameworks, and system-level orchestration, you’ll improve the accuracy, reliability, and reasoning capabilities of AI across the enterprise. Working closely with engineering, product, and operations teams, you’ll bring these innovations to life in resilient, fault-tolerant environments supporting millions of real-world customer conversations.

This is an opportunity to help define the AI foundation of the Un-carrier and build intelligent systems that set a new standard for customer experience. If you’re passionate about engineering quality, solving complex problems, and making a meaningful customer impact, we invite you to apply.

Responsibilities