Konstantine Karantasis
Staff Software Engineer II at The Apache Software Foundation
San Francisco, California, United States
Summary
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Rockstar🎓
Top SchoolKonstantine Karantasis is a Staff Software Engineer II in San Francisco with nine years of experience building high-performance, scalable distributed systems that process event-driven data in real time. He has deep roots in parallel and cloud computing—holding a Ph.D.—and applies that supercomputing mindset to design readable, high-throughput backend services and connectors. At Confluent he has driven core contributions to Kafka ecosystem projects (Schema Registry, Kafka Connect, REST proxy) and upstream Apache Kafka, focusing on robustness, threading safety, and seamless integrations for sinks like Elasticsearch and S3. An Apache Kafka committer and PMC member, he blends research rigor with production pragmatism, often working on the subtle engineering needed for versioning, classloader isolation, and bulk processing. Colleagues rely on him for thoughtful refactors and release-focused maintenance that keep complex streaming platforms reliable at scale.
9 years of coding experience
14 years of employment as a software developer
Ph.D. Computer Science and Engineering, Ph.D. Computer Science and Engineering at University of Patras
English, Greek, Spanish
Stackoverflow
1,973reputation
167kreached
42answers
0questions
apache-kafka
top-1%
Github Skills (51)
api-rest10
avro10
kafka-connect10
docker10
data-pipelines10
api-design10
restful-api10
amazon-elasticsearch10
testing10
storage10
kafka10
hdfs10
jdbc10
dockers10
java10
Programming languages (5)
Github contributions (5)
confluentinc/kafka-connect-storage-cloud
Nov 2016 - Jan 2022
Kafka Connect suite of connectors for Cloud storage (Amazon S3)
Role in this project:
Back-end Developer
Back-end DeveloperContributions:47 reviews, 444 commits, 145 PRs in 5 years 2 months
Contributions summary:Konstantine's contributions focused on implementing and refining the core functionalities of the S3 connector for the Apache Kafka Connect project. The commits involved adding the initial source code, including the skeleton of the connector and related tasks such as the source connector and task implementations. The user also corrected the naming of the sink and source to ensure better compliance with connector documentation and implemented basic connector and sink task configuration settings.
sinkconfluent-cloudamazonamazon-s3cloud
apache/kafka
Aug 2016 - Mar 2022
Mirror of Apache Kafka
Role in this project:Back-end Developer
Back-end DeveloperContributions:164 reviews, 186 commits, 219 PRs in 5 years 8 months
Contributions summary:Konstantine primarily focused on improving the stability and functionality of the Kafka Connect framework, particularly in the areas of sink task processing, configuration handling, and task management. Their contributions involved refactoring the internal storage mechanisms for thread safety, fixing bugs related to the handling of topic settings, and enabling support for classloading isolation in Connect. The work also included adding unit and integration tests to verify the correct behavior of these changes.
apache-kafkakafka-consumerapachescalakafka
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