Hernan Gelaf-romer
Tech Lead II - Data Infrastructure
Cambridge, England, United States
Summary
👤
Senior🎓
Top SchoolHernan Gelaf-romer is a Tech Lead II focused on data infrastructure at HubSpot with eight years of software engineering experience and a track record of advancing backend systems. He progressed through multiple senior engineering roles at HubSpot, shipping marketplace and data-platform improvements that bridge developer needs and production reliability. His open-source contributions to Apache HBase show deep familiarity with distributed storage semantics—fixing region scanner contracts, replication correctness, and incremental backup robustness. Based in Cambridge, he combines practical research experience from UMass Lowell with hands-on industry internships to solve low-level, high-impact infrastructure problems. Colleagues describe him as a pragmatic engineer who surfaces subtle correctness issues before they become outages. He brings a rare mix of backend systems expertise and production-focused leadership to data platform challenges.
8 years of coding experience
7 years of employment as a software developer
UMass LowellUniversity of Connecticut
Github Skills (9)
javas10
hbase10
databases10
replication10
java10
database10
testing9
mapreduce9
hadoop-mapreduce9
Programming languages (6)
Github contributions (5)
apache/hbase
Feb 2023 - Apr 2025
Apache HBase
Role in this project:
Back-end Developer
Back-end DeveloperContributions:94 reviews, 19 PRs, 143 comments in 2 years 1 month
Contributions summary:Hernan primarily contributed to the Apache HBase project by addressing issues related to client-side region scanner behavior and replication verification. They implemented changes to ensure proper adherence to the `RegionScanner.nextRaw` contract and improved the asynchronous recompare functionality within the replication process. Furthermore, the user worked on resolving potential scanner leaks caused by quota throttling and enhanced the incremental backup process by ensuring column family compatibility and re-using splits from the last full backup.
apache-hbaseapachedatabasejavahbase
hgromer/pymarshaler
Oct 2020 - Jan 2023
Marshall python objects to and from JSON
Contributions:13 releases, 41 commits, 9 PRs in 2 years 3 months
pythonmarshallingobjectmapperserializationmarshall
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