Core contributor to the Git project where I focused on performance and scaling for extremely large repositories. Improved performance of Git and Git-for-Windows through algorithmic improvements and/or multi-threading. Added telemetry facility to track Git performance for in-house users.Ported Git-for-Windows to the MSFT compiler tool-chain to facilitate debugging under Visual Studio.Contributed to the VFSforGit and Scalar to projects to help the Windows and Office teams to on-board to Git.Helped convert Team Explorer in Visual Studio from libgit2 to Git.

Creator of SourceGear DiffMerge, an award-winning desktop GUI application on Windows, Linux, and OS X to visually compare and merge files and directories. Responsible for design, implementation, documentation, and maintenance. http://sourcegear.com/diffmerge/Architect and engineer of SourceGear Veracity, a distributed version control system (DVCS) similar to git or mercurial but that also included distributed work item tracking and wiki features. Responsible for core version control operations, graph algorithms, and working copy manipulation. http://sourcegear.com/veracity/Creator of Zumero ZSS App Generator (ZAG), a desktop GUI application on Windows, Linux, and OS X to automatically generate sample Android and iOS mobile apps from SQL data. Designed application with a template system to make it easy to generate source code and project files new device targets without needing to modify the base application. Developed templates for Android, iOS, and Xamarin. http://zumero.com/dev-center/zss/

Worked as member of client's engineering team on SourceGear SourceOffSite Collaborative Edition, an early remote-access version control client. Responsible for adding SSL support and other low-level network development.Developed a PHP extension module to give PHP scripts access to real-time stock market data from a proprietary data provider. Also wrote a set of routines to compute Black-Scholes theoretical option prices. This let the client to convert their financial news website from hard-coded ISAPI DLLs to PHP which let the graphic design team have more control of the website.

Member of planning team and technical advisor to executive staff on Internet-related technologies and issues.Designed software architecture and demonstration prototype for the company's new financial news website.

Architect and lead engineer of AbiSource AbiWord, an open source word processor. Responsible for core cross-platform code sharing strategy and the WIN32 and GTK GUIs. http://abisource.com/Developed set of multi-dimensional non-linear curve-fitting and data visualization routines for contract client to analyze datasets from the scientific instruments they manufactured.

Technical advisor to VP of R&D for Internet and browser-related technologies.Architect and lead engineer for Spyglass Mosaic, a web browser. Licensed to Microsoft to serve as basis for Internet Explorer 2.0.Co-author of HTTP Digest Access Authentication RFC2069 and RFC2617.Lead engineer for the Windows versions of Spyglass Transform and Spyglass Plot, a pair of scientific data visualization tools.