Jonathan Klein
Chief Operating Officer
Richmond, Vermont, United States
Summary
🤩
Rockstar🎓
Top SchoolJonathan Klein is a seasoned technology executive with 15+ years building and scaling high-performance engineering organizations, currently serving as COO after a tenure as CTO at KOHO where he led SOC2 and PCI-DSS compliance, halved AWS spend per customer, and helped close a $150M Series D. He has a proven track record of growing teams from single digits to hundreds—most notably leading Wayfair’s storefront engineering organization to 600+ engineers—and driving architecture decisions that prioritized performance and developer productivity. Hands-on across the stack, Jonathan contributes to open-source projects like the fast code-search tool Hound and WebPageTest UI improvements, reflecting a pragmatic focus on reliability and user experience. He combines startup founder experience and cloud migration expertise with a curiosity-driven background in astronomy and physics, which informs a methodical, metrics-oriented approach to complex systems.
14 years of coding experience
10 years of employment as a software developer
BS Astronomy Physics, BS Astronomy Physics at Haverford College
Github Skills (13)
git10
php10
user-interface10
go10
backend10
devops10
back-end-development10
javascript9
error-handling9
configuration-management8
css7
html7
fest7
Programming languages (8)
Github contributions (5)
hound-search/hound
Jan 2015 - Jul 2015
Lightning fast code searching made easy
Role in this project:
Backend & DevOps Engineer
Backend & DevOps EngineerContributions:2 releases, 52 commits, 27 PRs in 5 months
Contributions summary:Jonathan primarily contributed to the backend infrastructure and core functionality of the code searching tool. Their work includes bug fixes related to repository indexing, implementing features to handle empty repositories, and improving error logging within the git integration. Additionally, the user made changes to the deployment configuration, including running the server at a specified address. They demonstrated a focus on improving the reliability and robustness of the application.
lightningsearching
catchpoint/WebPageTest
Jul 2013 - Jun 2014
Official repository for WebPageTest
Role in this project:Full-stack Developer
Full-stack DeveloperContributions:11 commits, 2 comments in 11 months
Contributions summary:Jonathan's primary contributions involve enhancing the user interface of the WebPageTest project. They implemented expand/collapse functionality for request headers, improving the details page's organization. Additionally, they added features for making the request section open when linked to and provided the ability to edit test labels. These changes suggest a focus on front-end development and improving the overall user experience of the WebPageTest application.
javascriptwebpagetest
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