Sr Engineer, Site Reliability
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 Solutionsis 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
Programming language: (Either Python/Java/JavaScript)
Cloud platforms, (AWS/Azure/GCP)
Automate infrastructure with IaC (Terraform, CloudFormation, Pulumi)
CI/CD pipelines (GitHub Actions, GitLab CI, Jenkins, Argo CD).
Containers (Dockers, Kubernetes),
Observability: Prometheus, Splunk Grafana, CloudWatch, Datadog,
ITSM framework.
Nice To Have
Experience with Kubernetes, Docker, or other container technologies
Familiarity with AppDynamics, Splunk, ELK, Prometheus, or Grafana
Understanding of service-level objectives (SLOs), SLIs, and error budgets
Experience in cloud migration and cloud-native systems architecture
Background in performance, security, or availability testing practices
