Yuriy Semchyshyn
Austin, Texas, United States
Summary
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SeniorYuriy Semchyshyn is a seasoned software engineer based in Austin with a decade of experience delivering reliable, scalable distributed systems across cloud, data analytics, and imaging workloads. Since 2020 he has been at Apple, helping run the world’s largest Apache Cassandra deployment—with over 300,000 nodes and exabyte-scale data serving tens of millions of queries per second. His prior roles span AWS Marketplace, Google Geo Monetization/Terra Bella, and Amazon Fulfillment Optimization, giving him a rare blend of low-level systems expertise and product-driven impact. He is proficient in Java, C#, and Go, and commands deep SQL/NoSQL know-how across PostgreSQL, Oracle, SQL Server, Redshift, BigQuery, Cassandra, DynamoDB, BigTable, Spanner, and CockroachDB, with Hibernate, Spring, Gradle, and CI/CD tooling. He holds a Ph.D. in Computer Science from Lviv Polytechnic (and has served as a senior lecturer/research assistant), reflecting a strong research-and-teaching foundation. He combines hands-on engineering with architectural thinking to deliver maintainable, scalable systems, and brings a curiosity that spans satellite imagery, ad tech, and fulfillment optimization.
10 years of coding experience
Github Skills (20)
cassandra10
java10
osgi10
sling10
database10
apache9
sidecar9
programming-language8
golang8
go7
protobuf6
interpreter6
protocol-buffers6
buffers5
compiler5
Programming languages (2)
Github contributions (5)
5/cassandra-sidecar
May 2023 - Mar 2025
Sidecar for Apache Cassandra
Contributions:94 pushes, 4 branches in 1 year 9 months
frankgh/cassandra-analytics
May 2023 - May 2023
Apache Cassandra Spark Analytics
Contributions:13 reviews, 2 PRs, 11 comments in 8 days
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