Charles Koehl
Technical Co-Founder Software Architect at Instant Roofer
Honolulu, Hawaii, United States
Summary
👤
Senior🎓
Top SchoolCharles Koehl is a technical co-founder and software architect with over two decades of full‑stack engineering experience, known for rapidly building mission‑critical web platforms in high-pressure environments. He single‑handedly developed PERSEUS, a COVID‑19 testing system used by Disney productions, the 2020 U.S. Olympic Trials, AEG venues and multiple state departments of health, automating patient workflows and lab integrations. A prolific solo developer and product architect, he has founded and led startups from Hawaiian Beach Rentals (acquired after he built a $30M business’s tech stack alone) to Instant Roofer, where he integrates AI and real‑time data for roofing workflows. Comfortable switching roles between CTO, systems analyst and product owner, he’s a fast, just‑in‑time learner who pairs deep engineering craft with practical business instincts. His background in media production and rare multi‑aptitude profile contribute to an unusually broad perspective on user experience, performance and creative problem solving. Based in Honolulu, he enjoys translating complex requirements into streamlined, scalable systems that shave time and cost for operators.
10 years of coding experience
27 years of employment as a software developer
Bachelor of Arts (BA) Economics, Bachelor of Arts (BA) Economics at Wesleyan University (Middletown, CT)
Spanish
Stackoverflow
1reputation
0reached
0answers
0questions
Github Skills (200)
javascript-client10
material-ui10
browser10
nodejs10
mongodb10
material-design10
expressjs10
rest-api10
mbaas10
parse10
raven10
javascript10
sdk10
cli10
greenhouse10
Programming languages (7)
Github contributions (5)
InstantRoofer/instantroofer-wp-plugin
Oct 2022 - Nov 2022
Contributions:205 pushes, 1 branch in 22 days
SustainHawaii/healthies-web-app
Sep 2016 - Feb 2017
Contributions:348 pushes, 15 branches in 4 months
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