I’ve been professionally building software for over twenty years. At this point I’ve worked with more languages and technologies then I can remember. They range from ancient technologies like dBase and Fortran to Assembly to C to C++ to to JavaScript to HTML to Ruby to Python…well, you get the point.

The commercial products I’ve played a leading role in include:

• Zerista backend. Ruby on Rails, Javascript, HTML, CSS. 
• Zerista iOS app. Objective C.
• Zerista Build – automated iOS build and submittal to Apple. Ruby.
• Ubisense client smart spaces. C++.
• Smallworld Internet Application Server. Magik.
• Magician IDE. Delphi (Object Pascal).
• RiskEZ. Delphi (Object Pascal)

I’ve also made a number of open source contributions, and am a primary contributor to:

• tensorflow-ruby. Ruby bindings for TensorFlow.
• ruby-prof. Ruby profiler written in C. 
• composite-primary-keys. Add support for composite keys to ActiveRecord. Ruby.
• libxml-ruby. Ruby bindings for libxml library. C.