We tackle the problem of designing and programming dynamic and reactive systems with four objectives: being based on a formal model of computation, using different types of concurrency, being efficient, and tolerating failures. The challenge lies in the fact that good formal models with very high level of abstraction generally result in non-efficient implementations. We propose a 'C' based library approach following the formal Dynamic Globally Asynchronous Locally Synchronous (DGALS) model of computation. We show how a DGALS system can be dynamically constructed from concurrent behaviors on distributed platforms thanks to the DGALS paradigm. Finally, our experimental results clearly indicate the large execution time and memory footprint gains compared to the current state of the art approaches.