Senior Engineer, Site Reliability; Cloud Automation T500-22464

Position: Senior Engineer, Site Reliability (Cloud Automation) [T500-22464]
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.

TMUS India Private Limited operates as TMUS Global Solutions.

About the Role:

The Senior Site Reliability Engineer for Cloud Platforms at T-Mobile is a hands-on technical Engineer responsible for ensuring the scalability, reliability, performance, and security of enterprise cloud environments across AWS, Azure, and GCP. They blend deep technical expertise in cloud infrastructure, automation, and observability with strong reliability engineering principles and a security-first mindset. They also utilize their strong problem-solving and analytical skills to automate processes, reducing manual effort and preventing operational incidents.

They design and implement resilient, automated cloud systems that support business-critical applications and services, driving excellence in uptime, performance, and operational efficiency. By continuously learning new skills and technologies, they adapt to changing circumstances and drive innovation. Their work and expertise contribute significantly to the stability and performance of T-Mobile's digital infrastructure. They are also responsible for diagnosing and resolving complex issues across networking, storage, and compute layers, driving continuous improvement through data-driven insights and Dev Ops best practices.

This engineer is also responsible for contributing to the overall architecture and strategy of technical systems, mentoring junior engineers, and ensuring solutions are aligned with T-Mobile's business and technical goals.

What You’ll Do:

- Design, build, and maintain highly available and scalable public cloud environments (AWS, Azure, GCP).
- Design, implement, and manage automated CI/CD deployment pipelines and infrastructure provisioning using Terraform, Ansible, or Cloud Formation across AWS, Azure, and GCP.
- Ensure infrastructure and applications are optimized for cost, performance, security, governance and compliance across cloud environments.
- Lead incident response, root cause analysis (RCA), and post-mortems, implementing automation to prevent recurrence.
- Partner with Cloud Security teams to deliver compliant, resilient architectures aligned with FCC and enterprise standards. Also manage vulnerability scanning, patching, and policy enforcement.
- Implement and manage Identity and Access Management (IAM) policies, roles, and federations for secure access control. Integrate security-by-design into all platform layers: IAM, networking and secrets management
- Collaborate with Cloud Network engineers to implement and support VPC/VNet peering, transit gateways, and service endpoints. Additionally Troubleshoot connectivity between cloud, on-prem, and partner networks
- Monitor, analyze, and enhance system performance, proactively identifying bottlenecks and ensuring reliability through data-driven observability and capacity planning.
- Resolve platform-related customer tickets by diagnosing and addressing infrastructure, deployment, and performance issues to ensure reliability and seamless user experience.
- Troubleshoot complex issues across the full stack—network, storage, compute, and application layers.
- Drive a culture of automation, resilience, and continuous improvement, contributing to the evolution of T-Mobile’s platform engineering and cloud infrastructure strategies.
- Drive innovation by recommending new technologies, frameworks, and tools.
- Perform additional duties and strategic projects as assigned.

What You’ll Bring :

- Bachelor’s degree in computer science, Software Engineering, or related field.
- 5–8 years of proven…