cube19
At cube19 I was part of a 3 person front end team. I was responsible for designing UI, and building complex charting tools and data visualization dashboards.
As the complexity of the app grew and new front end technology became available (React), we improved the performance and usability of the app by maintaining the older components in backbone / jQuery, while writing new features in React, and eventually refactoring the front end.
The app is used worldwide by large and small companies, processing large data sets from their CRMs for business analytics and management.
I also worked on a similar product available on the Salesforce App Exchange and built apps for internal customer management use.