TrafficCast
TrafficCast is the leader in travel time forecasting and traffic information, developing technology, applications and content based on advanced digital traffic data. TrafficCast serves the interactive, mobile, enterprise and public sector markets.
I worked with TrafficCast for over 2 years as a consultant, helping out with two major iOS projects and other general code maintenance. The highlight for me was an opportunity to rebuild their network stack and share the final design through a few different presentations.
http://mikezornek.com/posts/2019/1/designing-a-modern-swift-network-stack-video-and-slides/
Related Tech: Swift, Xcode, CircleCI, URLSession and friends, code reviews, testing, documentation.