Complex sentence: Because the size of each service is small, it allows the architecture of an individual service to emerge through continuous refactoring, hence reduces the need for a big up front design and allows for releasing the software early and continuously.
Split into simpler sentences: Because the size of each service is small, it allows the architecture of an individual service to emerge through continuous refactoring. Hence reduces the need for a big up front design and allows for releasing the software early and continuously.