Box led the Xbox One platform development team from its inception through launch on November 22, 2013.
Prior to that, Box led the development team that produced the Xbox SmartGlass platform (which was the basis for what is now known as Project Rome), worked on Brad Lovering's team working on model-driven runtime and tool support at Microsoft including "Oslo", and was an architect on Windows Communication Foundation (formerly known as "Indigo") and related technologies.
In 2017–2021, Box was Vice President of Engineering for Mixed Reality, where he led the engineering team that builds HoloLens, Windows Mixed Reality, Windows Hello, and other initiatives that live at the edge of the physical and digital worlds.
Along with Bob Atkinson, Mohsen Al-Ghosein, and Dave Winer, Box was one of the original four designers of SOAP, a basic messaging layer for web services.
[2] Box was a conspicuous figure in the Component Object Model (COM) community, where he coined the phrase "COM is love".