Simeon Pilgrim
Principal Engineer at Omnata
Canterbury, New Zealand
Summary
🤩
Rockstar🎓
Top SchoolSimeon Pilgrim is a Principal Engineer with 19 years' experience designing and delivering high-performance, data-focused systems across embedded, networking, and cloud ecosystems. He currently builds scalable ELT tooling for secure Snowflake data movement and has led KPI processing and migration efforts at enterprise scale, combining deep systems-level knowledge with pragmatic SQL and data engineering. A longtime open-source contributor, Simeon made significant backend and test-automation contributions to the widely used RoaringBitmap project, implementing a complex flip operation and strengthening iterator and ART-data-structure tests. Colleagues know him as a socially engaged problem-solver who connects people and ideas to unblock work, and his background ranges from ARM firmware reverse-engineering to distributed protocol implementation—skills that surface in both low-level debugging and high-level architecture.
19 years of coding experience
26 years of employment as a software developer
University of Canterbury
Stackoverflow
24,512reputation
1.6mreached
1,441answers
5questions
windows
top-5%
wix
top-5%
command-prompt
top-5%
sql
top-1%
json
top-5%
Github Skills (25)
unit-testing10
algorithms10
bitmap10
testing10
roarr10
data-structure10
java10
bitset10
javas10
sql10
data-structures10
bitmaps10
json9
batchfile9
wix9
Programming languages (5)
Github contributions (5)
RoaringBitmap/RoaringBitmap
May 2021 - Jun 2021
A better compressed bitset in Java: used by Apache Spark, Netflix Atlas, Apache Pinot, Tablesaw, and many others
Role in this project:
Back-end Developer & Test Automation Engineer
Back-end Developer & Test Automation EngineerContributions:16 reviews, 5 commits, 5 PRs in 1 month
Contributions summary:Simeon contributed significantly to the `roaringbitmap/roaringbitmap` project by implementing a "flip ranger" operation for the `Roaring64Bitmap` class, which involved modifying the core data structures and associated utilities. Their work included writing comprehensive unit tests to validate the functionality and edge cases of the newly introduced `flip` method. Furthermore, the user addressed iterator behavior, ensuring that the values are treated correctly as unsigned long values in multiple methods. Additionally, the user wrote extensive tests related to the ART data structure used by the project.
bigdataroaring-bitmapsspark-mlroaringbitmapdruid
simeonpilgrim/goldboxexplorer
Dec 2017 - Nov 2021
Contributions:33 commits, 16 pushes, 1 branch in 3 years 11 months
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