Sebastian Bernauer
Software Developer (Big Data)
Karlsruhe, Baden-Württemberg, Germany
Summary
🤩
Rockstar🎓
Top SchoolSebastian Bernauer is a software developer with nine years of experience specializing in big data back-end systems, currently building data platforms at Stackable in Karlsruhe. He has contributed to high-profile open-source projects like Trino and Apache Hudi, improving Parquet timestamp handling, data ingestion metrics, and observability integrations, and strengthened Kubernetes CRD generation in the Rust kube project. His work spans production-grade connectors, Avro/Parquet interoperability, and monitoring, reflecting a pragmatic focus on robustness and maintainability. Trained in computer science at DHBW, he blends academic rigor with hands-on engineering and a knack for spotting and fixing tricky serialization and edge-case bugs that often evade tests.
8 years of coding experience
2 years of employment as a software developer
Bachelor of Science - BS, Computer Science, Bachelor of Science - BS, Computer Science at Baden-Wuerttemberg Cooperative State University (DHBW)
Github Skills (27)
kubernetes10
apache-hudi10
incremental-processing10
clientside10
big-data10
kafka10
java10
javas10
sql10
kubernetes-pods10
parquet10
query-engine10
stream-processing10
webclient10
rust10
Programming languages (17)
Github contributions (5)
apache/hudi
Mar 2021 - Sep 2021
Upserts, Deletes And Incremental Processing on Big Data.
Role in this project:
Back-end Developer
Back-end DeveloperContributions:25 reviews, 8 commits, 15 PRs in 5 months
Contributions summary:Sebastian contributed to the Apache Hudi project by addressing various tasks. Their work involved preparing for Avro updates, adding Prometheus metric reporting, fixing issues related to KafkaAvroSchemaDeserializer, implementing a delta stream metric for the time of last sync, and refactoring string constants. These changes focused on improving data ingestion, monitoring, and code maintainability within the Hudi framework.
stream-processingbigdatahudiincrementalapacheflink
trinodb/trino
Apr 2021 - Feb 2024
Official repository of Trino, the distributed SQL query engine for big data, formerly known as PrestoSQL (https://trino.io)
Role in this project:Backend Developer
Backend DeveloperContributions:31 reviews, 5 PRs, 55 comments in 2 years 9 months
Contributions summary:Sebastian focused on enhancing the Trino query engine by modifying the Parquet reader. They implemented support for reading int64 timestamp data as bigints and refactored related code to improve its handling. Additionally, the user worked on the Google Sheets connector, including supporting insert operations and configuring HTTP timeouts, showing involvement in data integration aspects. Furthermore, they improved the documentation for file system access control.
prestodbdbmsindexingjdbcbigdata
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