Junseok Oh
Berlin, Germany
Summary
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RockstarJunseok Oh is a senior software engineer based in Berlin with a decade-long career focused on JVM-based backend systems and large-scale web crawling infrastructure. He has driven production services at Delivery Hero and built distributed crawler clusters, JS rendering pipelines, and log/analysis platforms during multi-year tenures at Kakao and other firms. Comfortable across Java, Node.js, Redis, HBase, Spark and containerized deployments, he pairs systems-level engineering with operational know-how for observability and scale. Junseok’s background includes DRM and media-server protocol work early in his career, giving him deep experience in secure service design and binary/server integration. He excels at turning research-grade prototypes into robust, automated production services and has repeatedly led CI, monitoring and deployment improvements. Based in Germany but with long roots in Korea, he brings cross-cultural engineering experience and a pragmatic focus on reliability.
6 years of coding experience
Github Skills (14)
java9
testing9
integration-testing9
docker-container9
jvm9
junit9
junit-test9
docker-compose9
test-container8
docker8
databases8
test-automation8
selenium8
database7
Programming languages (1)
Github contributions (2)
junseok-oh/versiontest
Jan 2020 - Jan 2020
Contributions:2 pushes, 2 branches in 1 day
testcontainers/testcontainers-java
Sep 2021 - Sep 2021
Testcontainers is a Java library that supports JUnit tests, providing lightweight, throwaway instances of common databases, Selenium web browsers, or anything else that can run in a Docker container.
Contributions:1 review in 1 day
databasedatabasesdocker-containerjavajunit-test
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