Önder Kalacı
Senior Software Engineer at Snowflake
Istanbul, Istanbul, Turkey
Summary
🤩
Rockstar🎓
Top SchoolÖnder Kalacı is a Senior Software Engineer with 12 years of experience specializing in PostgreSQL internals, distributed databases, and backend systems, currently working on Postgres at Snowflake. He has driven core contributions to the Citus extension—modifying COPY, index creation, and partitioning logic—and built frameworks to automatically manage and hide database objects, showing deep operational and developer-focused database knowledge. His career includes principal engineering roles at Crunchy Data and Microsoft after nearly a decade at Citus Data, reflecting sustained leadership in scaling and hardening distributed SQL systems. Holding a master's in computer engineering from Boğaziçi University, Önder pairs strong academic grounding with practical impact on widely used open-source database infrastructure.
11 years of coding experience
14 years of employment as a software developer
5.00, 5.00 at SNŞALLisans, Bilgisayar Mühendisliği, 3.05, Lisans, Bilgisayar Mühendisliği, 3.05 at Orta Dogu Teknik ÜniversitesiMaster, Bilgisayar Mühendisliği, 3.69, Master, Bilgisayar Mühendisliği, 3.69 at Boğaziçi Üniversitesi
Github Skills (7)
postgresql10
distributed-database10
sql10
performance-optimization9
database-administration9
c178
c118
Programming languages (10)
Github contributions (5)
citusdata/citus
Feb 2016 - Jan 2023
Distributed PostgreSQL as an extension
Role in this project:
Back-end Developer & Database Engineer / Database Administrator
Back-end Developer & Database Engineer / Database AdministratorContributions:2960 reviews, 1263 commits, 958 PRs in 6 years 11 months
Contributions summary:Önder contributed to the back-end development and database administration of the Citus project, a distributed PostgreSQL database. Their work included modifying core database functionalities such as the COPY command, index creation, and table partitioning, and they focused on improving the system's performance and reliability. The contributions involved fixing bugs, adding new features, and implementing enhancements to existing database code, demonstrating a strong understanding of the underlying database infrastructure. Moreover, they are responsible for a framework to add the support to automatically hide and manage objects (tables/function).
distributedrelational-databasesqlcitusscale
onderkalaci/postgres
Nov 2019 - Dec 2024
Mirror of the official PostgreSQL GIT repository. Note that this is just a *mirror* - we don't work with pull requests on github. To contribute, please see https://wiki.postgresql.org/wiki/Submitting_a_Patch
Contributions:25 PRs, 217 pushes, 26 branches in 5 years 1 month
patchgit-repositorypull-requestspostgrespostgresql
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