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!

Job Responsibilities:

Reliability Engineering

• Create new designs, architectures, and standards for delivering software and network services faster, better, and more reliably.
• Improve scalability, latency, and efficiency of T-Mobile's applications and network services.
• Contribute to cloud enablement, containerization, and microservices reliability.
• Manage improvement work, PoCs, and future automation projects.

Network Reliability & Operations

• Diagnose and resolve complex issues in routers, firewalls, load balancers, DNS, and global traffic managers (Cisco, Juniper, Check Point, A10, Infoblox, BIND, F5 GTM).
• Proactively forecast and address capacity and performance bottlenecks to prevent outages.
• Provide network expertise on outage bridges, rapidly identifying root causes using developed KPIs and telemetry.
• Define standards and playbooks for fault prevention and outage handling.

Observability & Telemetry

• Build and operationalize telemetry pipelines with ServiceNow AIOps, Dynatrace, ThousandEyes, SevOne, Splunk, and OpenTelemetry (OTEL).
• Develop AI/ML-driven models to detect anomalies and predict failures across network, infrastructure, cloud, DNS, and application layers.
• Create and maintain dashboards and health checks for real-time visibility into system and network reliability.

Cloud, Automation & Infrastructure-as-Code

• Use Terraform and IaC to deploy and manage infrastructure and applications in AWS cloud.
• Integrate reliability practices into CI/CD pipelines and DevOps workflows.
• Define, measure, and optimize performance KPIs, SLIs, and SLOs across hybrid environments (on-prem + cloud).
• Lead the development and evolution of network and service 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 assigned by business management as needed

Qualifications:

Education:

• Bachelor's degree, required or Equivalent Experience
• Master's degree (Preferred)

Experience: (Required)

• 7-10 years in system, network, or reliability engineering roles.
• Deep expertise in network infrastructure (Cisco, Juniper, Check Point, F5, A10, Infoblox, BIND, DNS).
• Hands-on experience with observability tools: Dynatrace, ThousandEyes, SevOne, Splunk, ServiceNow AIOps, OTEL.
• Proficiency with automation tools (Terraform, Ansible, Chef, Puppet) and cloud deployments (AWS preferred).
• Programming/scripting in Python, Go, or Shell.
• Experience with CI/CD pipelines, Kubernetes, and containerized environments.
• Experience in AI/ML-based telemetry and predictive network analytics. (Preferred)

Knowledge, Skills and Abilities: (Required)

• Focus: Able to develop and communicate goals in support of the business' mission.
• Drive: Self-motivated and able to work well under pressure with minimal supervision - including the ability to simultaneously support multiple strategically significant tasks under fixed/accelerated deadlines.
• Teamwork: Ability and desire to work cooperatively with others on a team. Develop, maintain, and strengthen partnerships that can provide information, assistance, and support.
• Communication: The ability to ensure that information is passed on to others who should be kept informed. Express self clearly in conversations and interactions with others. Clear business and technical writing skills. The ability to plan and deliver oral and written communications that make an impact and persuade their intended audiences.
• Customer Focus: The ability to demonstrate concern and meet external and/or internal customers' needs.
• Analytical: The ability to tackle a problem by using a logical, systematic, sequential approach.
• Technical Expertise: The ability to demonstrate depth of knowledge and skill in a technical area.
• Forward Thinking: The ability to anticipate the implications and consequences of situations and take appropriate action to be prepared for possible contingencies.
• Influencing Others: The ability to gain others' support for ideas, proposals, projects, and solutions.
• Motivational Support: The ability to enhance others' commitment to their work.
• Inspiring Others: Ability to convey confidence in employees' ability to be successful, especially at
• Conceptual Thinking: The ability to find effective solutions by taking a holistic, abstract, or theoretical perspective.
• Strategic Thinking: The ability to analyze the organization's competitive position by considering market and industry trends, existing and potential customers (internal and external), and strengths and weaknesses as compared to competitors.
• Fostering Innovation: The ability to develop, sponsor, or support the introduction of new and improved methods, products, procedures, or technologies.

We pride ourselves on encouraging a culture of innovation, advocating for agile methodologies, and promoting transparency in all that we do. Join us in embodying the spirit of the 'Un-carrier' and make a tangible impact! Our team is dynamic where no day is the same, and we are diverse and inclusive passionate about growth and transformation. If you're up to the challenge, apply today!

• 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

The pay range above is the general base pay range for a successful candidate in the role. The successful 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.

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 www.t-mobilebenefits.com.

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, 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 ApplicantAccommodation@t-mobile.com or calling 1-844-873-9500. 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.