Building applications for the IaaS Cloud is easy, right? "Sure, no problem - just lift and shift!" all the Cloud vendors shout in unison. However, the reality of building and deploying Cloud applications can often be different. This talk will introduce lessons learnt from the trenches during two years of designing and implementing cloud-based Java applications, which we have codified into our Cloud developer’s 'DHARMA' rules; Documented (just enough); Highly cohesive/loosely coupled (all the way down); Automated from code commit to cloud; Resource aware; Monitored thoroughly; and Antifragile. We will look at these lessons from both a theoretic and practical perspective using a real-world case study from Instant Access Technologies (IAT) Ltd. IAT recently evolved their epoints.com(http://epoints.com/) customer loyalty platform from a monolithic Java application deployed into a data centre on a 'big bang' schedule, to a platform of loosely-coupled JVM-based components, all being continuously deployed into the AWS IaaS Cloud