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Profile page created Apr 21, 2026

Software Engineer @QuestDB

Summary

Jaromir Hamala is a performance engineer with 18+ years of experience building and optimizing distributed systems. He currently works at QuestDB on core components such as data types, the pgwire protocol, and Kafka integration. He has gone from individual contributor to Director of Engineering—scaling teams from 25 to 40+—and back to hands-on technical work, focusing on system internals and performance optimization. His highlights include 3rd place overall in the 1 Billion Row Challenge (1st in the 32-core setup), serving as a JCP Executive Committee representative for Hazelcast, and speaking at conferences such as JavaOne, JFokus, and Devoxx.