Principal Engineer, Site Reliability
About The Position
This role supports organizational goals by enhancing system reliability and resilience to improve software development and deployment efficiency. It applies site reliability engineering principles and automation to reduce manual work and prevent operational incidents. The position requires strong problem-solving and analytical skills to resolve complex technical issues. 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. The role requires a bachelor's degree and seven years of related work experience, or an equivalent combination of education and experience. Acceptable areas of study include Computer Science, Engineering, or a related field. Preferred experience includes 7–10 years working in operations or development environments, 7–10 years troubleshooting customer-related issues and managing customer relationships, and 7–10 years of scripting proficiency alongside other programming languages. SQL is also a plus. The position requires application monitoring, automation, CI/CD, capacity planning, cloud infrastructure, incident management, infrastructure as code, mentorship, scripting, and system reliability skills. Preferred certifications include Google Cloud Certified – Professional Cloud Architect and AWS Certified DevOps Engineer. Certified Kubernetes Administrator (CKA) is also listed. Applicants must be at least 18 years old and legally authorized to work in the United States. Travel is not required. The position is not DOT-regulated or safety-sensitive. The national base pay range is $125,300–$226,000. The total target cash earnings opportunity is $150,360–$271,200, combining base salary and target annual incentive opportunity. Actual pay depends on factors including work location, qualifications, and experience; actual incentive payouts may vary. T-Mobile describes a benefits package that includes medical, dental, and vision insurance; a flexible spending account; 401(k); employee stock grants and employee stock purchase plan; paid time off and up to 12 paid holidays; paid parental and family leave; family-building benefits; backup care; enhanced family support; childcare subsidy; tuition assistance; college coaching; short- and long-term disability; voluntary AD&D, accident, life, disability, and long-term care coverage. Eligible employees may also receive mobile service and home internet discounts, pet insurance, and commuter and transit programs. Employees in regular, non-temporary roles are eligible for an annual bonus or periodic sales incentive or bonus, depending on role.
Requirements
- Bachelor's degree and 7 years of related work experience, or an equivalent combination of education and experience.
- At least 18 years of age.
- Legally authorized to work in the United States.
- Required skills and knowledge: application monitoring, automation, CI/CD, capacity planning, cloud infrastructure, incident management, infrastructure as code (IaC), mentorship, scripting, and system reliability.
Nice To Haves
- Degree in Computer Science, Engineering, or a related field.
- 7–10 years working in operations or development environments.
- 7–10 years troubleshooting customer-related issues and managing customer relationships.
- 7–10 years of strong scripting experience (such as Bash or PowerShell), along with other programming languages such as Java or C#; SQL is a plus.
- Google Cloud Certified – Professional Cloud Architect certification.
- AWS Certified DevOps Engineer certification.
- Certified Kubernetes Administrator (CKA) certification.
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.
- Use 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.
- Perform other duties or projects as assigned by business management.
Benefits
- Competitive base salary and compensation package.
- Annual stock grant and employee stock purchase plan.
- 401(k) and access to year-round money coaches.
- Annual bonus or periodic sales incentive or bonus, depending on role; corporate employees are eligible for a year-end bonus based on individual and/or company performance.
- Medical, dental, and vision insurance.
- Flexible spending account.
- Paid time off and up to 12 paid holidays.
- Paid parental and family leave.
- Family-building benefits, backup care, enhanced family support, and childcare subsidy.
- Tuition assistance and college coaching.
- Short- and long-term disability coverage.
- Voluntary AD&D, accident, life, disability, and long-term care coverage.
- Eligible employees may receive mobile service and home internet discounts, pet insurance, and commuter and transit programs.
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What This Job Offers
Job Type
Full-time
Career Level
Principal
