Principal Engineer, Systems Architecture

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!

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;
Frisco, Texas or Overland Park, Kansas areas.

This role develops and evolves technical network and service architectures to maintain and enhance the technology portfolio. It involves creating, adapting, and revising detailed schematics, hardware and software selections, and implementation processes. The role requires interpreting network simulations, test results, and technology studies to inform design decisions. Success is measured by the effectiveness of architecture solutions and their alignment with business objectives.

The work impacts organizational technology capabilities and customer service quality through improved network design and strategy.

• Lead the development and evolution of network and service
• Created architecture designs to support technology portfolio enhancements
• Conduct analysis and interpretation of network simulations and test results to inform architecture decisions
• Create and maintain technical documentation and presentations to communicate complex ideas to diverse audiences
• Drive engineering projects by applying techniques, supervising engineers, and optimizing network architecture processes
• Monitor industry technologies and standards to influence technology and policy decisions across the organization
• Coach and mentor engineers on technology decisions and contribute to cross‑functional technical investigations
• Also responsible for other duties/projects as assigned by business management as needed

• Bachelor's Degree plus 7 years of related work experience OR Advanced degree with 5 years of related experience
• Acceptable areas of study include Engineering, Computer Science

• 7-10 years Technical engineering experience
• 12+ years of experience across UCaaS, telecom, or cloud communications platforms.
• Cloud architecture expertise across Microsoft Azure, AWS or GCP; relevant cloud certifications are a plus.
• Strong hands‑on experience with IMS Core, SBC, SIP, VoIP, SMSC/MMSC, and related telecom integrations.
• Proven experience designing, deploying, and operating large‑scale, carrier‑grade and enterprise communications platforms.
• Experience with Agentic AI and AI‑powered workflow automation.
• Hands‑on experience building AI agents or solutions using Microsoft Copilot Studio, OpenAI, or similar platforms.
• Strong production troubleshooting and incident leadership skills, including diagnosing complex issues with limited data and driving critical incidents to resolution.
• Experience with cloud-native architectures, including Kubernetes, containers, microservices, APIs, and distributed systems.

• Analytical Thinking
• Communication
• Mentorship
• Network Architecture
• Solution Architecture
• Strategic Objectives
• Systems Architecture
• Systems Engineering
• Technical Writing
• Telecommunications

#LI-Corporate

• At least 18 years of age
• Legally authorized to work in the United States

Travel Required (Yes/No):
Yes

DOT Regulated Position (Yes/No):
No

Safety Sensitive Position (Yes/No):
No

Total Target Cash Earnings Opportunity: $156,480 - $282,240

National Base Pay Range:…