Antefix Consulting LLC

Contract Software Development

Full-stack Web & Mobile / JS / C# / C++

Antefix is one veteran developer with a rare mix of creativity and attention to detail. Review my professional experience here, or check out a few of my side projects to see my work up-close.

Full-stack experience with Node, Express, React, jQuery, and SQL.

Native development on mobile, desktop, and embedded platforms.

Emphasis on reliable, well-documented, maintainable code.

Detailed knowledge of JavaScript, C#, and C++.

Expert business analysis and UI design.

Significant unit testing experience.

Exceptional communication skills.


My consulting experience includes business analysis, full-stack web development, unit testing, and legacy development. Other projects include embedded and mobile software, line-of-business apps for the desktop, custom UI frameworks, and music software.

E-commerce site

JavaScript / MySQL / Node / Express / Bootstrap / Handlebars / jQuery / Linux / NGINX

Solely designed, implemented, and deployed new sales and fulfillment app for local-foods co-op with unusual cyclical sales process. Functionality includes web sales, on-site sales with integrated point-of-sale system, 'shopper note' system that allows buyers to customize cart items, product and inventory management for non-staff producer members, product intake and shopper checkout with handheld QR-code scanners, server-generated PDFs for invoices and product labels, plus numerous sales and accounting reports.

Hardware test app

Java / Android SDK / Sockets

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.

Geometry library

C# / Analytic geometry / Machine learning / Unit testing

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

Custom 'console' control

C# / Windows Forms / Multithreading

Developed complex Windows Forms control that embeds console-style output in any form. Control offers fast display updates with thread-safe write functions, plus 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 for ODM developers.

Legacy development

C# / C++ / Managed C++ / WPF / Windows Forms

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. Identified and fixed countless bugs.

Music synthesizer and sequencer

C++ / Android NDK + SDK / Win32 API / OpenGL ES / Audio DSP / OpenSL

Developed powerful music app for Android devices. Created full-featured cross-platform UI framework for OpenGL, custom text-rendering system, 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.

In-car media player

C++ / Windows CE + desktop / Win32 API / OpenGL ES

Developed UI for media device with satellite TV, DVD/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.

Paper currency scanner

C++ / Windows CE / Win32 API / Platform Builder

Developed major subsystems for money counter used in many banks. 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 built and customized Windows CE images with Platform Builder.

Mobile order fulfillment apps

C++ / Delphi / Windows CE + desktop / PalmOS / SQL / MFC / Sockets / Barcodes

Developed mobile apps used to fulfill orders for pioneering web grocer, including multi-order picking app, staging app, quality control app, and launcher. Collaborated on mobile web app used to manage inventory. 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.


Clients expect real expertise when they hire a contractor. No one developer can do everything, but I am serious about the skills I sell, and I'm up-front about what I can and can't do.


Strong JavaScript, C#, and C++

Some Java


Node, Express, React, jQuery, Handlebars, Bootstrap, HTML5, and CSS

WPF/XAML, Windows Forms, and Win32 API

Some Android SDK + NDK and Linux native

Custom controls and custom UI frameworks

Development practices

Expert business analysis

Strong OOD in multiple languages

Experience writing unit tests and custom test software

Much cross-platform development

Development tools

Experience with VS Code, Visual Studio, Git, and SVN

Some Android Studio experience

Other skills

Superior planning and writing skills

Expert UI design

Database design and SQL with multiple databases

Asynchronous and multithreaded development

Berkeley sockets and Winsock

2D graphics with OpenGL ES

Real-time audio synthesis, DSP, and music production

Basic Mathematica