Swirly Cloud is a Fintech startup that aims to deliver the benefits of Cloud computing to the financial industry. Our systems have been built from the ground-up to run efficiently in the Cloud with limited resources. They draw on the lessons learned from years spent building front-office trading applications, and adapt their best ideas for the Cloud. The order-book at the heart of our trading application was developed using best practice from the HFT space to achieve microsecond latencies.