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.

Job Overview

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.

Job Responsibilities

• 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

Required Education

• 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

Required Work Experience

• 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.

Required Knowledge, Skills and Abilities

• 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

Travel Required (Yes/No): Yes

DOT Regulated

DOT Regulated Position (Yes/No): No

Safety Sensitive Position (Yes/No): No

Total Target Cash Earnings Opportunity: $156,480 - $282,240National Base Pay Range: $130,400 - $235,200

The Total Target Cash Earnings Opportunity represents the expected total cash compensation for this role at target performance, combining base salary and annual incentive opportunity. Actual earnings may be higher or lower depending on individual performance and overall company results.

The base pay range reflects the compensation component of this opportunity. The candidate’s actual pay will be based on various factors, such as work location, qualifications, and experience, so the actual starting pay will vary within this range. To find the pay range for this role based on hiring location, click here.

At T-Mobile, employees in regular, non-temporary roles are eligible for an annual bonus or periodic sales incentive or bonus, based on their role. Corporate employees are eligible for a year-end bonus based on individual and/or company performance and which is set at a percentage of the employee’s eligible earnings in the prior year. Certain positions in Customer Care are eligible for monthly bonuses based on individual and/or team performance. The incentive component included in the Total Target Cash Earnings Opportunity reflects target performance. Actual earnings included in the Total Target Cash Earnings Opportunity reflect target performance; actual payouts may vary.

At T-Mobile, our benefits exemplify the spirit of One Team, Together! A big part of how we care for one another is working to ensure our benefits evolve to meet the needs of our team members. Full and part‑time employees have access to the same benefits when eligible. We cover all of the bases, offering medical, dental and vision insurance, a flexible spending account, 401(k), employee stock grants, employee stock purchase plan, paid time off and up to 12 paid holidays - which total about 4 weeks for new full‑time employees and about 2.5 weeks for new part‑time employees annually - paid parental and family leave, family building benefits, back‑up care, enhanced family support, childcare subsidy, tuition assistance, college coaching, short- and long‑term disability, voluntary AD&D coverage, voluntary accident coverage, voluntary life insurance, voluntary disability insurance, and voluntary long‑term care insurance. We don't stop there - eligible employees can also receive mobile service & home internet discounts, pet insurance, and access to commuter and transit programs! To learn about T-Mobile’s amazing benefits, check out

Never stop growing! As part of the T-Mobile team, you know the Un‑carrier doesn’t have a corporate ladder–it’s more like a jungle gym of possibilities! We love helping our employees grow in their careers, because it’s that shared drive to aim high that drives our business and our culture forward. By applying for this career opportunity, you’re living our values while investing in your career growth—and we applaud it. You’re unstoppable! T‑Mobile USA, Inc. is an Equal Opportunity Employer. All decisions concerning the employment relationship will be made without regard to age, race, ethnicity, color, religion, creed, sex, sexual orientation, gender identity or expression, genetic information, national origin, religious affiliation, marital status, citizenship status, veteran status, the presence of any physical or mental disability, or any other status or characteristic protected by federal, state, or local law. Discrimination, retaliation or harassment based upon any of these factors is wholly inconsistent with how we do business and will not be tolerated. Talent comes in all forms at the Un‑carrier. If you are an individual with a disability and need reasonable accommodation at any point in the application or interview process, please let us know by emailing View email address on click.appcast.io or calling View phone number on click.appcast.io. Please note, this contact channel is not a means to apply for or inquire about a position and we are unable to respond to non‑accommodation related requests.