John Esmet
Software Engineer at Chronosphere
New York, New York, United States
Summary
🤩
Rockstar🎓
Top SchoolJohn Esmet is a seasoned software engineer with 13 years of experience building high-performance backend systems and working on critical open-source infrastructure. Based in New York, he currently contributes to Chronosphere and has prior experience at Ambassador Labs, focusing on cloud-native, Kubernetes-integrated networking and observability. His open-source work spans prominent projects like M3 (a distributed TSDB), Envoy, and MariaDB, where he has improved query processing, tracing, and core storage engine internals—demonstrating deep systems, database, and performance-tuning expertise. He combines backend engineering with DevOps sensibilities, routinely fixing concurrency, configuration, and resource-handling issues that materially improve stability and scalability. Notably, his contributions often touch subtle, high-impact areas such as tag-rollup models, Prometheus conversion optimizations, and Fractal Tree index fixes, reflecting an ability to navigate and improve complex, low-level codebases.
13 years of coding experience
1 year of employment as a software developer
BS, Computer Science, BS, Computer Science at Rutgers, The State University of New Jersey-New Brunswick
English, Spanish
Stackoverflow
1reputation
0reached
0answers
0questions
Github Skills (45)
timeseries-database10
url-routing10
kubernetes10
c-language10
tracer10
envoyproxy10
aggregator10
memory-management10
databases10
http10
data-structure10
rule-engine10
tsd10
go10
prometheus10
Programming languages (7)
Github contributions (5)
percona/PerconaFT
Jun 2013 - Nov 2014
PerconaFT is a high-performance, transactional key-value store
Role in this project:
Back-end Developer & Database Engineer
Back-end Developer & Database EngineerContributions:263 commits, 1 comment in 1 year 4 months
Contributions summary:John primarily focused on optimizing and refining the transactional key-value store. Their work involved intricate code modifications within the core data structures of the system, including adjustments to basement nodes and message trees. They implemented features to improve performance and correct minor bugs. These commits suggest a strong understanding of data structure design, performance tuning, and system-level programming within the PerconaFT project.
transactionalperformancedatabasekey-value-storekey-value
MariaDB/server
Jul 2013 - Oct 2014
MariaDB server is a community developed fork of MySQL server. Started by core members of the original MySQL team, MariaDB actively works with outside developers to deliver the most featureful, stable, and sanely licensed open SQL server in the industry.
Role in this project:Back-end Developer & Database Engineer
Back-end Developer & Database EngineerContributions:202 commits in 1 year 3 months
Contributions summary:John primarily focused on optimizing and maintaining the MariaDB server's internals, particularly within the TokuDB storage engine. Their contributions involved code modifications related to Fractal Tree indexing, including bug fixes for partial eviction, and changes to the locking and messaging subsystems. They also added features such as a mechanism for better handling of key comparisons using a specific memcmp optimization. Further improvements were made to ensure that these operations are implemented using the best memory usage and performance metrics.
licensedsql-servermysqlsqlmariadb-server
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