Developed test app for patient intake device used in many hospitals and clinics. App verifies hardware for manufacture and repair team; interactive tests check display, touchscreen, speakers, status LEDs, Camera, WiFi, USB, and Ethernet port, while automated 'burn-in' mode tests WiFi and USB functionality under sustained load. App forwards results to central test server for storage and review.

Developed geometry library used to plan directional drilling projects. Designed and implemented several new geometry techniques that improve drilling outcomes. Also designed and implemented genetic algorithm that fixes user designs or creates new designs from scratch. Added hundreds of unit tests covering many thousands of test cases. Wrote extensive documentation for client developers.

Developed complex Windows Forms control that embeds console-style output in any form. Control offers fast display updates with thread-safe write functions, and numerous formatting, scrolling, and wrapping options. Display buffer can be saved to or restored from file, and mouse-selected content can be pasted to RTF, HTML, or plain text. Finished control is used to develop specialized test apps.

Refactored and extended legacy apps used to plan or train for directional drilling projects. Internationalized app for use with multiple languages. Performed comprehensive UI review and recommended dozens of usability improvements. Added built-in PDF printing and LandXML export functionality. Fixed countless bugs.

Developed powerful music app for Android devices. Created full-featured cross-platform UI framework for OpenGL, custom text rendering system with kerning, extensible real-time synthesis engine, and innovative step sequencer that supports polyrhythms, arbitrary time signatures, flexible note ties and bends, and automatic transposition. App runs on Android and Windows desktop.

Developed UI for media device with satellite TV, DVD and CD player, iPhone/iPod connectivity, and local file browser. Designed and implemented cross-platform UI framework with touchscreen-friendly list and grid views, sliders, buttons, and other controls. Created general-purpose development library with cross-platform support for file handling, threads, and thread synchronization.

Developed major subsystems for money counter that scans 1600 bills per minute. Designed and implemented lightweight transaction database with extensible query system, real-time bill image transfer system over TCP/IP, and flexible metadata export system implementing numerous legacy protocols over serial connection. Also customized Windows CE images with Platform Builder.

Developed wireless mobile apps used to fulfill orders for popular web grocer, including multi-order picking app, staging, quality control, and inventory management apps, and launcher. Created variety of desktop apps, including scriptable server emulator for mobile app testing, server stress-testing tool, and production monitoring utilities.

Personal website with open source software, music, games, and detailed notes on software development, physics, DSP, and math.