Braintree - An all-in-one solution to accept, process, and split payments in your mobile app or online - from small business to large enterprise.

Intercom - Intercom is a customer relationship management and messaging tool for web businesses. Build relationships with users to create loyal customers.

ProPay - ProPay is a multiple payment making service provider that lets its users to make payment to anyone in any part of the world.

Drift - A messaging app that helps you grow your business.

XE.com - XE.com Inc. (XE) is a Canadian online foreign exchange services company.

C++ - Has imperative, object-oriented and generic programming features, while also providing the facilities for low level memory manipulation