Jeffrey D. is a Principal Engineer at The Browser Company since July 2023, focusing on developing Swift tools and infrastructure for Windows to facilitate the porting of Arc from Mac. Prior to this role, Jeffrey D. served as an Engineering Manager at Meta from October 2017 to June 2023, where responsibilities included leading research on programming languages for low-power devices, mentoring engineers, and contributing to early hiring in the XROS project. Previous experience includes positions as Principal Software Engineer at Mombo Labs, where high-profile features for a mobile sharing platform were developed, Software Architect at Booyah, where cross-platform strategies were implemented, and Principal Software Engineer at Cooliris, specializing in browser plugin development. Earlier career highlights include positions at Xeriton Corporation and Microsoft, contributing to web development and significant Internet Explorer features. Jeffrey D. holds a BS in Computer Science from Missouri University of Science and Technology and an MS in Computer Science from the University of Washington.