Decoupling caps should be placed next to each power terminal on the HD3SS3415. Take care to minimize the stub length of the trace connecting the capacitor to the power pin.
Avoid sharing vias between multiple decoupling caps.
Place vias as close as possible to the decoupling cap solder pad.
Widen VDD/GND planes to reduce effect of static and dynamic IR drop.
The VBUS traces/planes must be wide enough to carry maximum of 2 A current