Jim Brennan
Urbana, Illinois, United States
Summary
🤩
Rockstar🎓
Top SchoolJim Brennan is a seasoned software engineer with over 30 years of experience building high-performance systems across gaming, mobile handsets, and distributed computing. He has deep expertise in low-level performance optimization, GPU-accelerated data processing, and large-scale Hadoop/YARN infrastructure, with recent work at NVIDIA contributing to the Spark RAPIDS and cuDF projects. Jim’s background spans console and PC engine programming, device simulation, and kernel/driver development, reflecting a rare blend of systems-thinking and hands-on coding across hardware-adjacent domains. Notably, his open-source contributions include updating NVCOMP integrations and addressing core CUDA and YARN stability issues, underscoring a focus on reliability and throughput. Based in Urbana, Illinois and a UIUC computer science graduate, he brings pragmatic engineering leadership grounded in decades of shipping complex, performance-sensitive software.
5 years of coding experience
37 years of employment as a software developer
University of Illinois Urbana-Champaign
Github Skills (26)
apache-spark10
c-language10
compress10
big-data10
cudf10
hadoop10
java10
javas10
rapids10
gpu10
yarnpkg10
yarn310
yarn-berry10
cuda10
yarn210
Programming languages (6)
Github contributions (5)
NVIDIA/spark-rapids
Aug 2021 - Jan 2023
Spark RAPIDS plugin - accelerate Apache Spark with GPUs
Role in this project:
Back-end Developer
Back-end DeveloperContributions:212 reviews, 17 commits, 82 PRs in 1 year 4 months
Contributions summary:Jim primarily focused on refactoring and modifying code related to the Apache Spark RAPIDS plugin, specifically concerning GPU acceleration. Their contributions involved moving classes, fixing typos, and updating copyright information. The user also updated the code to include the new nvcomp-2.x JNI APIs, enabled ZSTD integration tests, and improved tiered projections for hash aggregates and GpuProjectExec.
gpu-accelerationgpuapachebig-dataspark
apache/hadoop
Aug 2020 - Jul 2021
Apache Hadoop
Role in this project:Back-end Developer
Back-end DeveloperContributions:53 reviews, 129 commits, 18 PRs in 11 months
Contributions summary:Jim contributed to the Apache Hadoop project by addressing various issues related to the YARN (Yet Another Resource Negotiator) component. Their contributions include fixing bugs in the container executor, improving logging within the NodeStatusUpdaterImpl, and resolving potential null pointer exceptions in the RM UI. Furthermore, the user's work involved addressing test inconsistencies and preventing excessive container log sizes, improving the overall stability and reliability of the system. The contributions indicate a focus on the YARN component of Hadoop and its related infrastructure.
apachebig-datasparkhadoopjava
Find and Hire Top DevelopersWe’ve analyzed the programming source code of over 60 million software developers on GitHub and scored them by 50,000 skills. Sign-up on Prog,AI to search for software developers.