I co-founded and ran a startup for the last 5 years. I am responsible for the financial modelling which involves multiple entities. I also created a TDD-based web-service in Rails hooked up to a devops CI pipeline. I have capabilities in Bash scripting and iaas orchestration (puppet). I've also done technical modelling with octave. Finally, I was involved in several power electronics projects. Including some basic projects with TDD in embedded C (unity)