Jaroslav has been working in Java profiling space for the last >15 years - first at Sun, then at Oracle and now at Datadog. He was a member of the serviceability team, taking care of mostly JMX and all things related.

He is the maintainer and lead of the BTrace project (https://github.com/btraceio/btrace).

Recently, he has been spending time working on a profiling library providing features he wished were provided by JDK/JFR.