Wrote an A/B testing client library that interfaced with our custom A/B server. This was a universal A/B system that could be used by any Android application. It supported experiments with unlimited variants, persistent state, full analytics reporting, and used normalized weights to make configuration easy. This library was used with all of the BuzzFeed Android applications. This library also had full test coverage (using JUnit, Robolectric, Mockito, and Espresso tests). Having detailed documentation on usage and a demo application to showcase the features, my library became a good example of our best practices for the team to emulate on future projects.

Wrote a custom JSON parser for increased performance over the normal JSONObject/JSONArray. This allowed for much better performance when loading from cached JSON, giving the user a better experience.

Wrote a custom feed cell optimizer that prevented empty cells from showing on feeds with mixed cell widths. Triggered by any changes to the size or location of feed cells, it would move half-width cells up the feed to fill in any empty slots created by full-width content, then notify the adapter about the cells that changed.