Principal Engineer, Site Reliability

This role supports organizational goals by enhancing system reliability and resilience to improve software development and deployment efficiency. It involves applying site reliability engineering principles and automation to reduce manual work and prevent operational incidents. The role requires strong problem-solving and analytical skills to resolve complex technical issues effectively. Success is measured by system stability, incident reduction, and acceleration of software delivery processes. The work directly impacts the performance and reliability of the organization’s digital infrastructure and customer experience. Job Responsibilities:

• Implement site reliability engineering practices and automation tools to improve system reliability and resilience
• Collaborate with cross-functional teams to support Agile and DevOps methodology adoption
• Apply problem-solving and analytical skills to resolve complex technical challenges
• Utilize advanced technologies and tools to accelerate software development and deployment
• Engage in continuous learning to maintain technical expertise and adapt to emerging technologies
• Reduce operational incidents by minimizing manual effort through automation and effective problem resolution
• Also responsible for other duties/projects as assigned by business management as needed

• Bachelor’s Degree and 7 years of related work experience OR a combination of education and experience deemed equivalent (Required)
• Acceptable areas of study include Computer Science, Engineering or a related field. (Preferred)
• 7-10 years Working in operations or develops environments (Preferred)
• 7-10 years Troubleshooting customer related issues and managing customer relationships (Preferred)
• 7-10 years Very adept with scripting (Bash, PowerShell, etc.), in addition to other programming languages, Java, C#, etc. SQL also a plus (Preferred)

Knowledge, Skills and Abilities:

• Application Monitoring (Required)
• Automation (Required)
• CI/CD (Required)
• Capacity Planning (Required)
• Cloud Infrastructure (Required)
• Incident Management (Required), * Google Cloud Certified - Professional Cloud ArchitectCertification from Google that validates the ability to design, develop, and manage a secure, scalable, and reliable cloud architecture using Google Cloud technologies. (Preferred)
• AWS Certified DevOps EngineerCertification from Amazon Web Services that validates technical expertise in provisioning, operating, and managing distributed application systems on the AWS platform. (Preferred)

• Certified Kubernetes Administrator (CKA)Certification that validates the skills required for day-to-day administration of Kubernetes clusters. ()

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

$125300.00-$226000.00 life insurance, vision insurance, flexible benefit account, paid time off, paid holidays, tuition assistance, 401(k) United States, Washington, Bellevue 3650 131st Avenue Southeast (Show on map) Oct 17, 2026, 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!, DOT Regulated: DOT Regulated Position (Yes/No): No Safety Sensitive Position (Yes/No): No

Total Target Cash Earnings Opportunity: $150,360 - $271,200 National Base Pay Range: $125,300 - $226,000

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