Lari Hotari
Principal Engineer at The Apache Software Foundation
Helsinki, Finland
Summary
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RockstarLari Hotari is a Principal Engineer with 17 years of experience specializing in distributed systems, security, and high-performance backend engineering, currently based in Helsinki and working at StreamNative. As an active Apache Software Foundation member and Apache Pulsar PMC committer, he has deep expertise in large-scale messaging and storage projects like Apache Pulsar and Apache BookKeeper, where he has driven stability, security upgrades, and performance optimizations. His OSS contributions span protocol-hardening, CI/CD and Helm chart automation, and core JVM-language projects such as Groovy and Grails, reflecting a rare mix of systems-level networking knowledge and application-framework fluency. Lari’s work often targets subtle, high-impact problems—TLS and protocol corruption fixes, reverse-DNS avoidance, and checksum/performance improvements—that reduce operational risk in production. He brings practical DevOps experience alongside backend development, having improved benchmark suites, CI pipelines, and Kubernetes integrations for resilient releases. Known for thoughtful refactoring and security-first fixes, he combines long-term maintainability with measurable performance gains.
17 years of coding experience
Stackoverflow
5,240reputation
873kreached
120answers
0questions
unix
top-5%
grails
top-1%
java
top-5%
linux
top-5%
Github Skills (94)
go-gorm10
multithreading10
testing10
http10
bash10
spring-security10
refactor10
security10
apache-bookkeeper10
javas10
mtls10
refactoring10
reactor10
concurrency10
frameworkbenchmarks10
Programming languages (20)
Github contributions (5)
apache/pulsar-helm-chart
Aug 2020 - Oct 2022
Official Apache Pulsar Helm Chart
Role in this project:
DevOps Engineer
DevOps EngineerContributions:26 releases, 147 reviews, 27 commits in 2 years 1 month
Contributions summary:Lari primarily focused on improving and maintaining the CI/CD pipeline for the Apache Pulsar Helm chart. Their contributions include improvements to change detection, logging enhancements, and the addition of timeouts within CI scripts. They also worked on upgrading Kubernetes and related dependencies, as well as integrating chart publishing to the Apache Pulsar website, demonstrating a strong focus on automation and release management. The user addressed issues in the log collection and implemented K8s log collection and upload on failure.
event-streamingpulsarcharthelmhelm-chart
apache/pulsar
Sep 2020 - Jan 2023
Apache Pulsar - distributed pub-sub messaging system
Role in this project:Backend Developer
Backend DeveloperContributions:23 releases, 3203 reviews, 724 commits in 2 years 4 months
Contributions summary:Lari's commits primarily focus on refactoring and optimization within the Apache Pulsar messaging system. The user replaced usages of shaded Guava's Supplier with java.util.function.Supplier, improving code modularity and avoiding reliance on shaded dependencies. They also optimized metrics creation, reduced CPU consumption, and addressed potential null pointer exceptions in several components, showing a focus on performance and stability of the system.
event-streamingpulsarmessaging-systemstreamingapache
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