Robert Stupp
(P)PMC Member Of Apache Polaris (incubating)
Cologne Bonn Region Germany
Summary
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RockstarRobert Stupp is a seasoned Java engineer with 12+ years designing and operating distributed systems, currently serving as a (P)PMC member of Apache Polaris and a Committer to Apache Cassandra. He blends deep backend expertise with practical DevOps sensibilities—evident from contributions to cassandra-ccm, Cassandra Spark Connector, and JVM tooling like jamm—helping improve cluster management, throughput controls, and memory diagnostics. At Dremio and DataStax he has driven core data-platform features and operational improvements, while upstream OSS work on projects such as Nessie and Apache Iceberg shows a focus on transactional catalogs and metadata integration for data lakes. His hands-on work on a Java off-heap cache and agent-based memory measurement reflects a knack for low-level performance and memory management beyond typical application code. Based in the Cologne/Bonn region, he pairs long-term committership in major Apache projects with a pragmatic engineering approach that surfaces in build, release, and compatibility fixes across JVM ecosystems.
11 years of coding experience
23 years of employment as a software developer
German, English
Stackoverflow
1reputation
0reached
0answers
0questions
Github Skills (46)
apim10
transaction10
spark10
rate-limiting10
jvm10
python10
cassandra10
testing10
memory-management10
java10
scala10
javas10
transactionscope10
api10
quarkus10
Programming languages (14)
Github contributions (5)
projectnessie/nessie
Dec 2020 - Jan 2023
Nessie: Transactional Catalog for Data Lakes with Git-like semantics
Role in this project:
Back-end Developer
Back-end DeveloperContributions:6 releases, 4533 reviews, 831 commits in 2 years 1 month
Contributions summary:Robert primarily contributed to the back-end aspects of the Nessie project, focusing on enhancing data lake functionality. The commits demonstrate changes to version store implementations, handling of content attachments, and the integration of features like merge and transplant operations. The user's work involved modifying core database adapter functionalities for more robust and efficient data storage and retrieval.
data-lakesdatatransactionalaws-lambdaspark
snazy/ohc
Nov 2014 - Dec 2021
Java large off heap cache
Role in this project:Back-end Developer
Back-end DeveloperContributions:2 reviews, 428 commits, 12 PRs in 7 years 2 months
Contributions summary:Robert implemented core functionalities for an off-heap cache in Java, as indicated by the commit messages focused on "growing," and the code differences involving crucial classes like `OHCacheImpl.java`, `HashEntryAccess.java`, and `HashPartitionAccess.java`. These changes involve implementing core methods like `put`, `get`, and `remove`, along with various internal data structures, which suggests the developer was responsible for the core logic of the cache. The commits reveal work related to thread safety and memory management.
lruoff-heapmmapcachejava
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