Dave Marion
Principal Software Engineer at Wrench
Cockeysville, Maryland, United States
Summary
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RockstarDave Marion is a Principal Software Engineer with 13 years of experience designing, developing, and deploying large-scale enterprise Java systems and machine learning-enabled solutions. Based in Cockeysville, Maryland, he currently leads architecture and delivery at Wrench, focusing on robust back-end services and performance-sensitive components. He contributes to high-profile open-source projects like Apache Accumulo, where he implemented core features, improved classloader management, and fixed compaction and logging issues—evidence of deep systems-level Java expertise. Known for blending practical engineering with attention to reliability and observability, he consistently turns complex distributed requirements into maintainable production systems. Colleagues value his ability to bridge ML ambitions with enterprise constraints, delivering scalable, auditable software.
13 years of coding experience
Github Skills (14)
javas10
thrift10
accumulo10
java10
pac9
zookeeper9
pact9
file-management8
logging8
data-structure7
data-structures7
algorithm7
algorithms7
datastructures-algorithms7
Programming languages (8)
Github contributions (5)
apache/accumulo
Nov 2012 - Jan 2023
Apache Accumulo
Role in this project:
Back-end Developer
Back-end DeveloperContributions:3163 reviews, 228 commits, 1158 PRs in 10 years 3 months
Contributions summary:Dave contributed to the Apache Accumulo project by implementing several features and fixes within the Java-based codebase. Their work primarily involved modifications to the core functionalities of the system, as seen in the implementation of a new command, the restructuring of classloader management, and the correction of errors in the compaction process. The user also added improved logging within the system and addressed various code quality and performance issues.
accumulobig-data
dlmarion/accumulo-access
Sep 2023 - Mar 2026
Apache Accumulo Access Control Library
Contributions:88 pushes, 61 branches, 1 tag in 2 years 6 months
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