Principal Engineer, Site Reliability [T500-20295]

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.

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 :

As a Principal SRE, you will be a key member of the CFL Platform Engineering and Operations team ,you will lead reliability engineering for AI-powered platforms supporting LLM applications, AI gateways, and enterprise-scale services across finance, credit, collections, and document systems. You will design and implement observability and incident response frameworks, scale high-performance infrastructure, and champion SRE best practices to support secure, automated, and resilient systems.

What You’ll Do :

• Architect observability and incident response pipelines for LLM, API, and backend systems
• Define SLAs, SLIs, alerts, and dashboards for latency, throughput, and availability
• Lead high-severity incident response, root cause analysis, and system recovery
• Collaborate with AI, Platform, and Security teams to enforce operational guardrails
• Implement automation-first strategies using GitLab CI / CD, Terraform, and deployment tooling
• Guide infrastructure tuning, capacity planning, and cost optimization
• Drive monitoring across hybrid clouds using Prometheus, Grafana, Splunk, Open Telemetry
• Support AIOps, model observability, policy enforcement, and audit readiness
• Mentor senior SREs and foster a high-ownership, technical excellence culture

What You’ll Bring :

Must Have Skills :

Nice To Have :