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 is a subsidiary of T-Mobile US, Inc. and 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