Jonathan Castillo
Principal Software Engineer at Capital Technology Group
Greater Tampa Bay Area United States
Summary
👤
Senior🎓
Top SchoolJonathan Castillo is a Principal Software Engineer with 12 years of full-stack experience building high-impact web products across startups and enterprise teams in the Greater Tampa Bay Area. He’s shipped revenue-driving features and subscription funnels using Ruby/Rails on the backend and modern front-ends with Angular, Vue, and plain JavaScript, often owning end-to-end delivery and test coverage. Jonathan has led cross-functional initiatives—from a Fortune 500 Tag Control product to creator-focused automated ad strategy recommendations—that blend product sense with engineering rigor. He’s also an entrepreneur who founded PollSports, applying real-time Node.js and Firebase systems to deliver personalized fantasy football advice. Comfortable both as a hands-on coder and a technical lead, he repeatedly improves conversion and developer velocity via pragmatic full-stack solutions.
12 years of coding experience
12 years of employment as a software developer
BSBA Business Administration and Management General, BSBA Business Administration and Management General at Questrom School of Business, Boston University
Spanish
Github Skills (7)
livereload6
reload5
vscode5
vscode-extension5
nodejs5
typescript4
live-server2
Programming languages (1)
Github contributions (5)
jonathan-c/alfred
Feb 2014 - Jul 2014
Contributions:80 commits in 5 months
jonathan-c/moneyball
Jan 2015 - Sep 2018
Contributions:27 pushes in 3 years 8 months
Find and Hire Top DevelopersWe’ve analyzed the programming source code of over 60 million software developers on GitHub and scored them by 50,000 skills. Sign-up on Prog,AI to search for software developers.