Rajkumar Rangaraj
Principal Software Engineer at Microsoft
Redmond, Washington, United States
Summary
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Rockstar🎓
Top SchoolRajkumar Rangaraj is a Principal Software Engineer based in Redmond with 11 years of hands-on experience building back-end systems and driving telemetry and monitoring integrations at Microsoft. He has deep expertise in OpenTelemetry and Azure monitoring—contributing to high-profile open-source projects like opentelemetry-collector-contrib and opentelemetry-dotnet by enhancing exporters, SDK tagging, and batching processors to improve observability at scale. Rajkumar’s background spans escalation engineering to senior management, giving him a rare combination of production troubleshooting, test automation, and people leadership. He is known for pragmatic improvements—such as adding connection-string and environment-variable support and refining tag/annotation handling—that make telemetry more actionable for cloud customers.
11 years of coding experience
14 years of employment as a software developer
Higher Secondary, Computer Science, Higher Secondary, Computer Science at St. Michaels Higher Secondary School, CoimbatoreBachelor of Engineering (B.E.), Computer Science, Bachelor of Engineering (B.E.), Computer Science at Park College of Engineering and Technology, Coimbatore
Stackoverflow
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Github Skills (28)
unit-testing10
azure-application-insights10
azure-sdk10
testing10
distributed-tracing10
net10
configuration-management10
dotnet10
instrumentation10
microsoft-azure10
zipkin10
asp-net10
go10
sdk10
dotnet-core10
Programming languages (13)
Github contributions (5)
microsoft/ApplicationInsights-dotnet
Mar 2020 - Aug 2022
ApplicationInsights-dotnet
Role in this project:
Back-end Developer & Test Automation Engineer
Back-end Developer & Test Automation EngineerContributions:232 reviews, 174 commits, 123 PRs in 2 years 5 months
Contributions summary:Rajkumar contributed to the pre-aggregation features for various telemetry types, including exceptions, traces, and dependencies. Their work involved modifying test cases, specifically within the `AutocollectedMetricsExtractorTest.cs` file, to validate the correct marking and processing of these telemetries. Additionally, the user added tests to account for scenarios involving no severity levels and dimension limits. This suggests a focus on enhancing the system's ability to collect and process metrics related to application health and performance.
dotnetapplication-insightstelemetrysdkazure
Azure/azure-sdk-for-net
Aug 2020 - Jan 2023
This repository is for active development of the Azure SDK for .NET. For consumers of the SDK we recommend visiting our public developer docs at https://learn.microsoft.com/dotnet/azure/ or our versioned developer docs at https://azure.github.io/azure-sdk-for-net.
Role in this project:Back-end Developer
Back-end DeveloperContributions:1213 reviews, 61 commits, 316 PRs in 2 years 5 months
Contributions summary:Rajkumar's contributions primarily focused on enhancing the Azure Monitor OpenTelemetry Exporter for .NET. They added functionality related to Azure Monitor OpenTelemetry Exporter, including the implementation of an EventSource and the inclusion of SDK version information. These changes involved modifying existing code to incorporate features related to telemetry, demonstrating their expertise in back-end development and integration with Azure services. The user also updated the codegen and adopted OpenTelemetry .NET beta2 changes.
azureazure-sdkdotnetmicrosoftc-sharp
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