Karl Baum
Chief Technology Officer at J2 Health
New York, New York, United States
Summary
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Rockstar🎓
Top SchoolKarl Baum is a Chief Technology Officer based in New York with 13 years of experience building and scaling SaaS platforms and engineering teams. He co-founded and served as CTO of VTS, growing the engineering organization from a single developer to over 60 engineers while instituting daily continuous delivery, TDD, and a front-end migration from jQuery to Angular for a platform used across billions of square feet. He has led product-integrated engineering efforts—building Device-as-a-Service APIs, white-label merchant storefronts, and underwriting integrations with Plaid and Rutter—and now directs technology at J2 Health. A still-hands-on leader, he contributes to backend performance work in open source (notably optimizing Redis pipelining and Ruby compatibility in Coverband). Known for mentoring practices that drove near-zero attrition, he blends product focus, operational rigor, and pragmatic engineering.
14 years of coding experience
24 years of employment as a software developer
BS, Computer Science, BS, Computer Science at State University of New York at Binghamton
Stackoverflow
282reputation
21kreached
6answers
1question
Github Skills (13)
ruby10
code-coverage10
performance-optimization10
redis10
test-automation8
json6
heroku6
activerecord6
highcharts6
database6
asset-pipeline6
ruby-on-rails6
image6
Programming languages (6)
Github contributions (5)
danmayer/coverband
Dec 2015 - Aug 2021
Ruby production code coverage collection and reporting (line of code usage)
Role in this project:
Back-end Developer
Back-end DeveloperContributions:13 reviews, 520 commits, 192 PRs in 5 years 8 months
Contributions summary:Karl primarily focused on optimizing the code coverage reporting and storage functionality of the Coverband project. Their work included implementing Redis pipelining for improved performance, enabling testing with C extensions, and refactoring aspects related to thread tracing and file filtering. They also added benchmarks and support for Ruby 1.9.
sinatraline-of-coderack-middlewarerailsreporting
kbaum/browser-timezone-rails
Jan 2013 - Jul 2019
Rails engine that sets the Rails timezone to the browser time zone for each request.
Contributions:51 commits, 14 PRs, 21 pushes in 6 years 7 months
zonebrowserrailsrails-engineruby
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