Lauri Tulmin
Senior Software Engineer at Splunk
Estonia
Summary
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RockstarLauri Tulmin is a Senior Software Engineer based in Estonia with 21 years of experience specializing in backend Java development. He currently contributes at Splunk after a long tenure at ZeroTurnaround, bringing deep expertise in performance, correctness, and cross-platform issues. Lauri is an active open-source maintainer on high-profile OpenTelemetry Java projects, improving instrumentation for frameworks like Vert.x, Kafka and Azure while fixing memory leaks and Android compatibility quirks. His work reflects a pragmatic focus on keeping libraries compatible with modern APIs and reducing runtime overhead in production systems. Colleagues know him for methodical refactors that prevent subtle bugs and for improving observability tooling used widely across cloud-native stacks. He combines legacy system knowledge with modern telemetry practices to help teams ship reliable, performant Java services.
21 years of coding experience
16 years of employment as a software developer
Github Skills (16)
opentelemetry10
javas10
debug10
instrumentation10
sdk10
java10
bugtracking10
vertx9
performance-optimization9
android9
apache-kafka9
rest-api8
api-rest8
testing8
restful-api8
Programming languages (10)
Github contributions (5)
open-telemetry/opentelemetry-java-instrumentation
Jun 2021 - Jan 2023
OpenTelemetry auto-instrumentation and instrumentation libraries for Java
Role in this project:
Back-end Developer
Back-end DeveloperContributions:4317 reviews, 106 commits, 3289 PRs in 1 year 7 months
Contributions summary:Lauri primarily focused on enhancing and maintaining the OpenTelemetry auto-instrumentation and instrumentation libraries for Java. They made improvements to various instrumentation modules, including those for RESTlet, Azure Core, Vertx, and Apache Kafka, by fixing bugs and refactoring code to use newer APIs. Their contributions also involved ensuring that these instrumentations worked correctly with recent versions of the libraries and fixing potential memory leaks.
instrumentationinstrumentation-librariesjava-agenttracingauto-instrumentation
open-telemetry/opentelemetry-java
Feb 2022 - May 2022
OpenTelemetry Java SDK
Role in this project:Back-end Developer
Back-end DeveloperContributions:63 reviews, 7 commits, 25 PRs in 3 months
Contributions summary:Lauri contributed to the OpenTelemetry Java SDK by addressing various issues related to code correctness, Android compatibility, and performance. The user fixed bugs, improved the codebase, and optimized performance. They made changes to improve the codebase, including fixing Android desugaring issues and decreasing logging levels.
tracingobservabilitysdkotelopentelemetry-java
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