www.zonerapp.com (has been updated since) PHP/SQL/JS/HTML/CSS Summer 2012
Every exterior construction job in NYC requires a thorough zoning analysis before the city approves a building permit. Zoning laws are complicated. Zoner automates part of this process. It takes any NYC address and generates a report about how the property can be used and built on according to zoning regulations.
I worked on this project in 2012 for M.Arch Architects, then continued to provide software and business advice over the next two years.
The site included authentication, PayPal integration, SVG building representations drawn with an algorithm I wrote, and the logic to perform the zoning analysis itself.