Sr Engineer, Site Reliability [T500-27100]

About T-Mobile: T-Mobile US, Inc. (NASDAQ: TMUS), headquartered in Bellevue, Washington, is America’s supercharged Un-carrier, connecting millions through its strong nationwide network and flagship brands, T-Mobile and Metro by T-Mobile. Customers benefit from an unmatched combination of value, quality, and exceptional service experience.

About TMUS Global Solutions: TMUS Global Solutions is a world-class technology powerhouse accelerating the company’s global digital transformation. With a culture built on growth, inclusivity, and global collaboration, the teams here drive innovation at scale, powered by bold thinking.

About the Role: The Senior Systems Reliability Engineer (SRE) ensures the stability, performance, and reliability of IT services and infrastructure. This role combines software engineering and operations expertise to build and maintain highly available, scalable systems. As a leader in DevOps and cloud reliability practices, the engineer supports continuous improvement of automation, deployment pipelines, observability, and incident management, while mentoring junior engineers and optimizing production workflows. The position plays a critical part in enabling software to be delivered faster, better, and more reliably to support business and customer needs.

What You’ll Do:

• Design and maintain CI/CD pipelines and DevOps automation solutions
• Guide incident response and improve system resiliency and performance
• Build monitoring tools, dashboards, and proactive alerting for non-production environments
• Create and maintain infrastructure as code (IaC) for scalable environments
• Work with containerization and microservices in cloud-native platforms
• Mentor junior engineers and collaborate across teams on cloud and DevOps initiatives
• Improve software delivery processes through automation, cloud migration, and service orchestration
• Perform other duties and technical projects as assigned

What You’ll Bring:

• Bachelor’s degree in Computer Science, Software Engineering, or related field (Master’s preferred)
• 4–7 years of experience in systems reliability, DevOps, or cloud infrastructure engineering
• Experience with CI/CD tools like Jenkins, GitLab CI, or CloudBees
• Familiarity with infrastructure and configuration management tools (Ansible, Chef, Puppet)
• Hands-on knowledge of public and private cloud platforms
• Experience with application performance monitoring (APM) and log aggregation tools
• Proven experience working in Agile and DevOps environments

Must Have Skills:

• SRE OR Site Reliability
• CI/CD tools like Jenkins, GitLab CI, or CloudBees

Configuration management tools (Ansible, Chef, Puppet ) –

more than one any of those:

• IaC : Terraform OR Cloud formation or Pulumi
• AWS OR GCP OR Azure
• Prometheus OR Grafana OR Datadog OR Splunk
• Python OR Shell OR Powershell OR GO (Automation)
• Middleware services (managing the backend services)
• Familiarity with using one of AI tools like Cursor, Claude or Copilot