Karthik Subramanian
Principal Software Engineer at Microsoft
Redmond, Washington, United States
Summary
🤩
Rockstar🎓
Top SchoolKarthik Subramanian is a Principal Software Engineer at Microsoft with 15 years of experience building large-scale data systems and developer tooling. He has driven features across Microsoft Fabric and Azure Synapse Analytics—shipping improvements to Spark, Delta Lake, low-shuffle merge semantics, and optimize-write workflows—while also leading efforts to containerize deployments and accelerate end-to-end testing. His background includes deep backend work on Azure Time Series Insights, optimizing Parquet IO and distributed query execution, and hands-on customer troubleshooting for production-scale telemetry. An ASU computer science graduate from Chennai, he blends research experience in learning technologies with product-oriented engineering from roles at PayPal and startups. Beyond core engineering, he boosts team productivity through developer-focused innovations like prebuilt dev-containers with AI-driven debugging. Known for shifting complex distributed algorithms into practical, reliable platform features, he excels at marrying performance optimizations with operational reliability.
15 years of coding experience
13 years of employment as a software developer
Master's degree, Computer Science, Master's degree, Computer Science at Arizona State UniversityComputer Science, Computer Science at Vidya Mandir Senior Secondary SchoolB.Tech., Information Technology, B.Tech., Information Technology at SSN College of Engineering
English, Tamil, Telugu, Hindi
Stackoverflow
60reputation
5kreached
1answer
3questions
Github Skills (67)
apache-spark10
python10
swagger10
microsoft-azure10
rest-api10
openapi10
r10
big-data10
dotnet10
scale10
api10
sdk10
rest10
sql10
data-processing10
Programming languages (7)
Github contributions (5)
Azure-Samples/Azure-Time-Series-Insights
Mar 2019 - Oct 2020
Sample modules written in different languages that can be used as templates for applications needing to query Time Series Insights
Contributions:1 review, 17 commits, 10 PRs in 1 year 7 months
querytime-series-insightslanguagestime-seriesinsights
TimeSeriesInsights/azure-rest-api-specs
Dec 2017 - Jun 2020
The source for REST API specifications for Microsoft Azure.
Contributions:13 PRs, 39 pushes, 7 branches in 2 years 7 months
apispecificationsrestmicrosoft-azuremicrosoft
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