Jon D Koon Email & Phone Number

Belmont, Ma, Us

Cambridge, Massachusetts, Us

HubSpot’s mission is to help millions of organizations grow better

Atlanta, Georgia, Us

- Led engineering from MVP to processing 50M+ in transactions over 3 years- Built web app, marketing site, CI/CD, api, emails, financial plumbing, design system, monorepo, nonprofit database, internal tools, and testing- Technical design and implementation for donation processing (bank, card, stock, and crypto), charity search, recurring transactions, workplace giving, investments, referral program, gift cards, and tax statements- Established product and development culture and practices including sprint planning, retrospectives, code reviews, customer interviews, product specs, technical specs, & project managementFacilitated 360 reviews, held bi-weekly 1-on-1s, mentored entry-level engineer into proficient full stack developer- Designed and implemented event-driven microservice backend architecture- Built a flexible graph-based funds flow and accounting system to facilitate donations from various payment methods- Built a custom branded design system and component library in React

San Francisco, Ca, Us

- Tech lead of twitter.com’s UI foundation team- Created React based design system extracted from twitter.com providing all web teams at Twitter access to the canonical Twitter UI- Fostered cross-team collaboration on shared design system including monthly emails celebrating progress and contributions- Organized quarterly design system training sessions- Member of accessibility and code review culture working groups- Built the unified mobile and desktop web Twitter from inception- Coded i18n infrastructure, timelines backend, CI/CD for Scala backend- Built OAuth2+Session authentication to support api access from the client- Implemented key features such as follow, favorite, Retweet, conversation timeline, tweet compose, multi-photo upload, poll creation, GIF search, toast notifications, poll voting, and app navigation- #Hackweek popular vote winner for QuoteTweets timeline- Organized all day team events to accelerate style system migration- Hired seasoned mobile developers and cross trained web engineers- Led newly formed team to ship profiles redesign on iOS and Android- Orchestrated and led team through merger with verified accounts team- Led user profiles redesign: experiment rollout, user timelines, followers, following, media timeline, profile editing, enhanced Tweet UI, avatar and header image upload- Managed project plan and coordinated engineering team- Won popular vote for company wide #hackweek. Demoed inline profile editing with drag and drop image upload- Shipped inline profile editing after successful experiment- Migrated profiles web features from Ruby to Scala

Atlanta, Georgia, Us

- Built front and backend for a store diagramming and reporting tool for The Home Depot using Django, jQuery UI, and Backbone.js- Led frontend development for a custom enterprise resource planning system utilizing Backbone.js, jQuery, ASP.Net MVC3, and Razor- Architected a peer-to-peer business intelligence platform for Aaron Rents utilizing ASP.Net MVC 3, C#, SQL Server, jQuery, and KnockoutJS- Designed and built several web services for the Administrative Office of the Courts to securely transmit traffic citation data using Java

Atlanta, Ga, Us

I taught intro to programming in JavaScript for the interactive development program

Computer Science

Education record