Stembolt
I have been a developer for 15 years, the last 8 of which I've also been CEO of Stembolt (previously FreeRunning Technologies).
Stembolt is now a 100% Canadian 20-developer agency focusing in ecommerce. We maintain an open source ecommerce platform called Solidus (https://solidus.io) which powers over a billion dollars a year in online transactions.
Large stores and brands offload the technical "nuts and bolts" of ecommerce onto us so they can focus on their products and marketing.