Kishan Karunaratne

California, United States

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Summary

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Rockstar

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Top School

Kishan Karunaratne is a backend-focused software engineer with 12 years of experience building and testing distributed database tooling and drivers, based in California. He has contributed substantive enhancements and test coverage to high-profile open-source projects in the Cassandra ecosystem, including the DataStax Python and C# drivers and the apache/ccm cluster management library. His work demonstrates deep familiarity with data modeling, User-Defined Types, integration testing, and cross-platform tooling for complex database systems. Kishan brings practical QA and automation expertise—expanding integration tests for reconnection logic, timeouts, and edge-case results—to ensure robust, production-ready clients. A UC Berkeley alumnus, he pairs a long-term commitment to backend reliability with a track record of thoughtful refactors and platform compatibility improvements that quietly reduce operational friction.

12 years of coding experience

University of California, Berkeley

Github Skills (24)

unit-testing10

pytest10

python10

cassandra10

clientside10

testing10

data-modeling10

net10

databases10

asp-net10

driver10

dotnet-core10

file-handling10

webclient10

csharp10

Programming languages (7)

C#JavaC++CHTMLRubyPython

Github contributions (5)

datastax/python-driver

Jul 2014 - Sep 2015

DataStax Python Driver for Apache Cassandra

Role in this project:

Backend Developer

Contributions:81 commits, 59 PRs, 40 pushes in 1 year 2 months

Contributions summary:Kishan's contributions primarily focused on implementing and testing User-Defined Types (UDTs) within the DataStax Python Driver for Apache Cassandra. They implemented UDT datatype tests, including creating and inserting data into UDTs. The user also worked on fixing merge conflicts and programmatically creating data for UDTs, demonstrating a deep understanding of data modeling and type handling within the Cassandra driver. Additionally, the user refactored existing tests, specifically for handling nested, unregistered UDTs, and addressing collection types within the UDTs.

python-driverpythoncassandraapachedatastax

datastax/csharp-driver

Jul 2015 - Mar 2016

DataStax C# Driver for Apache Cassandra

Role in this project:

Back-end Developer & QA Engineer / Test Automation Engineer

Contributions:37 commits, 31 PRs, 42 pushes in 8 months

Contributions summary:Kishan primarily focused on enhancing the integration tests for the DataStax C# Driver for Apache Cassandra. Their work involved expanding and modifying existing integration tests, including adding tests for features such as client warnings, per-host request timeouts, timer-based reconnections, and materialized view metadata. They also addressed integration test failures and implemented test coverage for the TryNextHost retry decision, the default connection heartbeat, and empty RowSet results.

dotnetdriverdatastax-drivernosqlcassandra

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