Principal Engineer, Commercial AI Forward Deployment

Location: Frisco, Texas

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** This is not a remote position. T-Mobile is a hybrid work environment requiring work in the office three (3) days per week. The successful candidate will be located in either Seattle, Washington or Frisco, Texas areas.**

Job Overview

The Principal Engineer, Commercial AI Forward Deployment is T-Mobile's senior IC AI delivery leader on the FDE team. This role owns the end-to-end delivery of net-new agentic AI solutions within an assigned business domain from initial scoping through production optimization. Working within requirements defined by TPMs and BU stakeholders, the Principal FDE independently owns the domain relationship, sets the technical agenda for the FDE team in the domain, and mentors FDEs working alongside them.

Leading without formal authority, this role builds trust with BU operations leaders and translates business requirements into agentic AI solutions in days, not quarters. Performance is evaluated exclusively on validated ROI targets for each domain assignment, not on activity, tickets, or deployments shipped. This role reports to the Sr Manager or Sr Director, Agentic Automation & FDE.

Job Responsibilities

Domain Ownership & BU Relationship: Full lifecycle ownership of net-new agentic AI delivery within the assigned domain from initial scoping through production optimization. Partner with TPMs and BU stakeholders to define requirements, map real workflows, and assess data and integration readiness. Build and maintain trust with BU operations leaders, managers, and end users. Present domain ROI outcomes and delivery roadmap to BU leadership quarterly.

Agentic System Delivery & Iteration: Design and deliver net-new agentic AI solutions in live production environments. Architect and implement system integrations, RAG pipelines, prompt orchestration, and multi-agent workflows tailored to BU-specific needs. Run controlled A/B experiments in production cohorts to measure and document validated ROI impact. Instrument deployed systems with real-time logging and feedback collection for continuous improvement.

System Integration & Data Engineering: Build and own integration layers connecting AI solutions to BU tools and data sources (CRM, billing, inventory, contract repositories). Normalize BU-specific datasets for AI system consumption. Identify and close data quality gaps that limit solution accuracy or reliability. Feed domain-specific insights back into the practice through structured engineering handoffs.

FDE Practice Leadership: Mentor and technically guide FDEs co-deployed in the domain or adjacent domains. Contribute to FDE practice standards including engagement methodology, diagnostic frameworks, responsible AI review processes, and data security guidelines. File bi-weekly reports documenting failure modes, edge cases, and performance gaps. Participate in rotation planning and knowledge transfer for incoming FDEs.

Strategic AI Delivery & Responsible AI: Serve as the technical accountability point for AI safety, data privacy, and responsible AI compliance within the domain. Ensure all delivered solutions meet T-Mobile's data governance and security standards, including CPNI and PII requirements. Partner with TPMs and practice leadership to translate domain delivery learnings into practice improvements. Represent FDE validated ROI outcomes in cross-functional senior leadership forums.

Bachelor's Degree in Computer Science, Software Engineering, Data Science, or related technical field. Master's Degree preferred; relevant equivalent experience accepted.

Additional Locations: Bellevue, Washington