Sergey Nuyanzin
Apache Flink PMC at The Apache Software Foundation
Dusseldorf, North Rhine-Westphalia, Germany
Summary
🤩
Rockstar🎓
Top SchoolSergey Nuyanzin is a pragmatic distributed-systems engineer with eight years of focused experience contributing to and leading core Apache projects from Dusseldorf, Germany. As an Apache Flink PMC and long-standing Apache Calcite committer/PMC, he blends deep Java backend expertise with practical improvements to stream processing, SQL semantics and connector reliability. Sergey’s work spans production-grade fixes—concurrency, windowing, Kafka connectors—and language-level SQL function enhancements in Calcite, demonstrating both systems and query-engine fluency. He has driven build and test robustness across JVM tooling (JLine, DataFaker) and removed flaky tests while adding useful developer ergonomics like automatic dependency downloads. Currently at Confluent after a senior staff role at Aiven, he pairs open-source stewardship with hands-on engineering that improves performance and correctness in real-time data platforms. An MIT/MIET-educated engineer, he brings the rare combination of commit-level code craft and project governance in widely used Apache ecosystems.
8 years of coding experience
17 years of employment as a software developer
Master's degree, Master's degree at National Research University of Electronic Technology (MIET)
English, Russian, German
Stackoverflow
1reputation
0reached
0answers
0questions
Github Skills (24)
apache-calcite10
apache-flink10
testing10
tableau-api10
big-data10
kafka10
java10
calc10
javas10
api10
sql10
build-automation10
data-processing10
maven10
stream-processing10
Programming languages (13)
Github contributions (5)
apache/flink
Apr 2018 - Dec 2022
Apache Flink
Role in this project:
Back-end Developer
Back-end DeveloperContributions:1386 reviews, 128 commits, 559 PRs in 4 years 8 months
Contributions summary:Sergey contributed to the Kafka connector and table features of the Apache Flink project. Their work involved fixing concurrency issues, implementing window function support and improving performance via code optimizations. This indicates a focus on enhancing the core functionalities of the stream processing and data processing capabilities of the project. They also addressed issues related to SQL syntax and testing aspects.
pythonflinkconnectorsqlapache
datafaker-net/datafaker
Jan 2022 - Jan 2023
Generating fake data for the JVM (Java, Kotlin, Groovy) has never been easier!
Role in this project:Back-end Developer & Test Automation Engineer
Back-end Developer & Test Automation EngineerContributions:428 reviews, 291 commits, 758 PRs in 1 year
Contributions summary:Sergey primarily focused on enhancing the datafaker-net/datafaker repository by implementing new features and addressing testing-related concerns. They introduced methods with varargs and a templatify function for filling templates. The user also replaced deprecated matchers with actual ones in testing files and fixed potentially flaky tests. Additionally, the user added support for date time patterns in string representation of date and time.
groovytestingneverjava-kotlinkotlin
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