I joined Apple two weeks after the initial release of Maps in 2012.
For the first few years,
I worked on the Routing Engine for Driving and Walking Directions (the back end for Turn-by-Turn Navigation).
Most recently,
I started working on Traffic.
Previously,
I did research on efficient algorithms and data structures,
and I taught at MIT and at the University of Tokyo.
Recent work:
All-Pairs Approximate Shortest Paths and Distance Oracle Preprocessing (ICALP 2016)
On Balanced Separators in Road Networks (SEA 2015)
Program committees: DISC 2016, ESA 2014, ATMOS 2012