Yahor Yuzefovich
Member Of Technical Staff at Cockroach Labs
San Francisco, California, United States
Summary
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Rockstar🎓
Top School
Top expert inGo Development and Data Management
Yahor Yuzefovich is a Member of Technical Staff at Cockroach Labs with eight years of experience building robust, high-performance backend systems for cloud-native, distributed SQL databases. He contributes directly to CockroachDB core features—optimizing query execution, improving EXPLAIN ANALYZE output, and tightening SQL-to-storage integration—demonstrating deep systems and database internals expertise. A Berkeley CS graduate with highest distinction and a history of internships at Cloudera and Cockroach Labs, he combines strong academic grounding with hands-on production impact. Previously balancing early-career hustle (including years driving for Lyft) with rapid technical growth, he brings pragmatism and resourcefulness to complex reliability problems.
8 years of coding experience
2 years of employment as a software developer
Bachelor of Arts - BA, Computer Science, GPA 3.98, Highest Distinction in General Scholarship, Bachelor of Arts - BA, Computer Science, GPA 3.98, Highest Distinction in General Scholarship at University of California, BerkeleyBachelor's degree, Computer Science, Bachelor's degree, Computer Science at City College of San FranciscoMathematics, Mathematics at BSU Lyceum
Русский, Английский
Github Skills (14)
database-tuning10
databases10
query-optimization10
go10
sql10
relational-databases10
database10
database-optimization10
optimization10
data-structure9
distributed-systems9
data-structures9
testing8
performance-testing8
Programming languages (5)
Github contributions (5)
cockroachdb/cockroach
May 2018 - Jan 2023
CockroachDB — the cloud native, distributed SQL database designed for high availability, effortless scale, and control over data placement.
Role in this project:
Backend Developer
Backend DeveloperContributions:3971 reviews, 3112 commits, 4615 PRs in 4 years 8 months
Contributions summary:Yahor's commits focus on implementing core database-related features within the CockroachDB project. They are involved in improving the performance of the query execution engine through the use of efficient data structures (like in-memory hashing), modifying the EXPLAIN ANALYZE output to include more informative details, and fixing issues related to the handling of various types of queries, including stored procedures, foreign keys, and inverted indexes. The commits also involve the database layer, ensuring that the SQL layer is correctly connected to the underlying storage infrastructure.
distributed-sqldistributed-sql-databasemysqlsql-databasesql
yuzefovich/cockroach
May 2018 - Apr 2025
CockroachDB - the open source, cloud-native SQL database.
Contributions:2 PRs, 9080 pushes, 6323 branches in 6 years 11 months
mysqlsql-databasesqlcockroachdboracle
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