Microservices are a software development technique - a variant of the Service Oriented Architecture (SOA) structural style - that arranges an application as a collection of loosely coupled services

What are microservices?

Microservices - also known as the microservice architecture - is an architectural style that structures an application as a collection of services that are

  • Highly maintainable and testable
  • Loosely coupled
  • Independently deployable
  • Organized around business capabilities
  • Owned by a small team

The microservice architecture enables the rapid, frequent and reliable delivery of large, complex applications. It also enables an organization to evolve its technology stack.

Snippet from Wikipedia: Microservices

A microservice architecture – a variant of the service-oriented architecture (SOA) structural style – arranges an application as a collection of loosely-coupled services. In a microservices architecture, services are fine-grained and the protocols are lightweight. The goal is that teams can bring their services to life independent of others. Loose coupling reduces all types of dependencies and the complexities around it, as service developers do not need to care about the users of the service, they do not force their changes onto users of the service. Therefore it allows organizations developing software to grow fast and big, as well as use off-the-shelf services easier. Communication requirements are reduced. These benefits come at a cost to maintain the decoupling. Interfaces need to be designed carefully and treated as a public API. One technique that is used is having multiple interfaces on the same service, or multiple versions of the same service, so as to not disrupt existing users of the code.