Launched in 2015, Jet.com is a new kind of marketplace that reimagines online shopping from the ground up. Founded on three simple values – trust, transparency and fairness – Jet is powered by a smart technology that creates more value for everyone, finding innovative ways to pull costs out of the supply chain and, together with its retailer and brand partners, shares those savings with shoppers. We're heavy users of F#, and have based our architecture around Azure-based event-driven functional microservices.