Plamen Jeliazkov
Senior Hadoop Engineer at PayPal
San Jose, California, United States
Summary
👤
Senior🎓
Top SchoolPlamen Jeliazkov is a Senior Hadoop Engineer with 13 years of experience building and operating large-scale distributed data platforms, currently helping scale PayPal’s largest Hadoop clusters from San Jose. He combines deep Java and HDFS expertise with hands-on operational leadership—driving root-cause analyses, vendor coordination, and cluster optimizations while contributing back to Apache Hadoop. At WANdisco he led early Big Data engineering efforts, helped implement S3HDFS and Non-Stop NameNode features, and is named on a patent for geo-distributed file system replication. His open-source contributions to apache/hadoop include impactful HDFS truncate work, RPC state alignment, and datanode registration improvements, reflecting a focus on robust file-system behavior under real-world conditions. Trained at UC San Diego and mentored by early Hadoop architects, he blends research-grade technical depth with practical production hardening.
13 years of coding experience
7 years of employment as a software developer
University of California, San Diego
English, French, Bulgarian
Github Skills (11)
javas10
filesystem10
hdfs10
hadoop10
java10
mapreduce9
rpc9
hadoop-mapreduce9
testing8
data-structure7
data-structures7
Programming languages (4)
Github contributions (5)
apache/hadoop
Jan 2015 - Jul 2018
Apache Hadoop
Role in this project:
Back-end Developer
Back-end DeveloperContributions:22 commits in 3 years 6 months
Contributions summary:Plamen contributed to the Apache Hadoop project, primarily focusing on file system operations and enhancements. Their work included implementing file truncation functionality, adding the truncate operation to the SLive tool for testing, improving logging for datanode registration, and addressing issues related to truncate failures. Furthermore, the user was involved in adding stateId to RPC headers for state alignment and addressing a bug in FsDatasetImpl related to truncate operations.
apachebig-datasparkhadoopjava
pjeli/installer
Apr 2015 - Apr 2022
Contributions:7 pushes, 1 branch in 7 years
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