Principal Forward Deployment Engineer

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! Are you ready to join the Un-carrier movement? This role is the technical foundation the rest of T-Mobile's Forward Deployment Engineering practice builds on. As Principal Engineer, Forward Deployment, you set the technical direction for agentic AI delivery across every FDE domain, take on the hardest problems the practice encounters, and build the shared components and standards that let the rest of the team move faster. You lead through influence and technical credibility — not through a management chain — and your scope spans the entire FDE portfolio. You'll stay hands-on: writing and reviewing production code is core to the job. You'll also shape T-Mobile's broader AI direction alongside platform, data, and infrastructure leadership. Performance is measured on validated ROI across the FDE portfolio — not activity, tickets, or deployments shipped. This role reports to the Senior Manager or Senior Director, Agentic Automation & FDE. Su [... source excerpt omitted ...] lems because you've already cleared the way. If you want to help bring agentic AI to T-Mobile in a way that's fast, reliable, and built to last — we'd like to hear from you. Job Responsibilities: Set the technical direction for agentic AI delivery across the practice, keeping the team well positioned as the model and tooling landscape evolves. Establish the architectural approaches the practice builds on, and shape which problems are worth solving with agentic AI. Drive delivery consistency across domains so quality holds regardless of who is deployed. Step in where engagements need senior technical help. Build and maintain the shared technical foundations the rest of the team d [... source excerpt omitted ...] egree Computer Science, Software Engineering, Data Science, or related technical field. Master’s Degree preferred. Relevant equivalent experience accepted. (Required) 7-10+ years production engineering experience, including 3+ years deploying LLM-based systems in production and 2+ years delivering agentic or multi-agent systems. Track record of AI solutions that measurably improved a business outcome. (Required) Demonstrated experience setting technical direction for a team or practice: defining standards others follow, guiding the architecture of other engineers, and developing engineers. (Required) Prior experience in a solutions engineering, forward deployment, or embedded te