Kseniia Sumarokova
Senior Software Engineer at ClickHouse
Amsterdam, North Holland, Netherlands
Summary
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Rockstar🎓
Top School
Top expert inDistributed Database Technologies and Analytics Platforms
Kseniia Sumarokova is a Senior Software Engineer with six years of experience specializing in back-end systems and database integrations, currently contributing to ClickHouse from Amsterdam. She has progressed from Software Engineer to Senior at ClickHouse and previously worked at Yandex, bringing solid production experience with high-performance analytics systems. Her open-source work on ByConity highlights deep familiarity with ClickHouse internals and cross-database connectivity—implementing ODBC support for PostgreSQL, DateTime64 and Decimal types, and improving table-function integrations with MySQL/Postgres. Known for pragmatic problem-solving, she combines applied mathematics training with a focus on robust build and bridge-layer fixes that improve real-world interoperability. An analytical thinker who enjoys untangling storage-engine integration challenges, she often surfaces subtle edge cases in database interoperability that others miss.
6 years of coding experience
3 years of employment as a software developer
Bachelor's degree Applied mathematics and computer science, Bachelor's degree Applied mathematics and computer science at Higher School of Economics
Github Skills (10)
postgresql10
clickhouse10
cprogramming-language9
sql9
c-language9
odbc8
databases8
database8
sql-database8
relational-databases8
Programming languages (6)
Github contributions (5)
ByConity/ByConity
Mar 2021 - Sep 2021
ByConity is an open source cloud data warehouse
Role in this project:
Back-end Developer
Back-end DeveloperContributions:527 commits in 6 months
Contributions summary:Kseniia's commits focus on the ClickHouse database engine's interaction with external data sources. The user implemented and tested new functionalities for interacting with the PostgreSQL database through ODBC, including support for DateTime64 and Decimal types. They also fixed build issues related to ODBC-bridge and enhanced the functionality of the ClickHouse library bridge, ensuring better handling of library dictionary sources. The user improved the integration of Table functions with MySQL and PostgreSQL storage engines, and updated the logic for the system query handler.
datawarehousewarehousedbmsolapclickhouse
kssenii/ClickHouse
Apr 2020 - Feb 2023
ClickHouse is a free analytics DBMS for big data
Contributions:419 commits, 2 PRs, 3295 pushes in 2 years 10 months
data-analyticsanalyticsdbmsmysqlsql
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