I worked at Tackk as a software engineer for a little over a year with a great team of developers. One of the most amazing feats we did was to rebuild the entire web application from scratch in about 4-5 months. This included an editing experience, which you see when you go to the homepage, discovery and browsing in the Tackkboard, and APIs, administrative features on top of all of those things.
Below are some screenshots I took of the site. You can also see the latest version at tackk.com