Sr. Systems Reliability Engineer

1 week ago

Hyderabad, India ANSR Full time
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 is a world-class technology powerhouse accelerating the company’s global digital transformation. TMUS India Private Limited is a subsidiary of T-Mobile US, Inc. and operates as TMUS Global Solutions.

The Senior Site Reliability Engineer (Performance) is a hands-on engineering role focused on ensuring that customer-facing and internal applications deliver optimal performance, scalability, and resiliency. This role goes beyond traditional testing—profiling Java/Spring Boot applications, tuning Kubernetes workloads, analyzing network issues, and applying cloud-native best practices to drive systemic improvements. The engineer designs and automates performance tests, formulates hypotheses, and uses data-driven insights to recommend or implement fixes at code, infrastructure, and architecture levels. With an automation-first mindset, they embed performance engineering into CI/CD pipelines and partner with developers, architects, and SREs to create a performance-first culture.

Profile and optimize Java/Spring Boot microservices, diagnosing memory leaks, GC issues, thread contention, and improving latency and throughput
Design and execute performance tests (load, stress, spike, endurance) using tools such as JMeter, k6, Gatling, Locust, or LoadRunner
Develop reusable test frameworks and integrate performance tests into CI/CD pipelines
Analyze and optimize Kubernetes workloads (EKS/AKS/GKE), tuning autoscaling, pod configs, and Helm charts
Use observability tools (AppDynamics, Prometheus, Grafana, Splunk) and tracing to identify performance bottlenecks
Conduct performance diagnostics across network layers (TCP/IP, gRPC,
Mentor engineers and participate in design reviews to embed performance practices from the start

4–7 years of experience in performance engineering or backend system optimization
~ Strong Java/Spring Boot development background
~ Hands-on experience with Kubernetes-based environments and container optimization
~ Familiarity with AWS (preferred), Azure or GCP acceptable
~ Experience with performance/load testing tools: Ability to conduct network analysis and work with observability tools
~ Experience in embedding performance tests into CI/CD pipelines
~ Java / Spring Boot
Kubernetes (EKS/AKS/GKE)
Performance testing tools: Prometheus, Grafana, AppDynamics, Splunk
Cloud: AWS (preferred), Azure, GCP
Network-level analysis ( gRPC, TLS optimization)
Experience mentoring SRE or developer teams on performance best practices
Performance-related certifications (Java, Kubernetes, AWS

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