Reactive Microsystems: The Evolution of Microservices at Scale

Jonas Bonér, Co-Founder & CTO, Lightbend, Inc.

Audience: Architects

Technical level: Intermediate

If you want your application to provide millisecond response times and close to 100% uptime, traditional architectures with single SQL databases and thread-per-request models simply cannot compete with microservices. This report discusses strategies and techniques for building scalable and resilient microservices, and helps you work your way through the evolution of a scalable microservices-based system.

When it comes to development speed, time-to-market, and continuous delivery, microservices can do wonders for your organization. Author Jonas Bonér, Founder and CTO of Lightbend and author of Reactive Microservices Architecture (O’Reilly), demonstrates how to refactor a monolithic application step-by-step. You’ll briefly land at single instance microliths (micro monoliths) before working your way toward a scalable and resilient microsystem.

This report will help you:

  • Examine the essential traits of an individual reactive microservice
  • Understand why monolithic architectures are a problem
  • Manage the hard part of microservice design: the space between individual services
  • Shift the focus from domain objects to events in domain-driven design
  • Make services more efficient, performant, and stable by applying reactive programming techniques
  • Make the services work together, collaboratively, as a single reactive system
  • Move beyond CRUD towards Event Sourcing/CQRS to scale state in an event-based design
  • Leverage fast data in microservices to manage real-time data at scale

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About Author(s)

Jonas Bonér, Co-Founder & CTO, Lightbend, Inc.

Jonas Bonér is co-founder and CTO of Lightbend, creator of the Akka project, initiator and co-author of the Reactive Manifesto, and a Java Champion. Learn more at

About Lightbend

Lightbend (@Lightbend) is leading the enterprise transformation toward real-time, cloud-native applications. Lightbend provides scalable, high-performance microservices frameworks and streaming engines for building data-centric systems that are optimized to run on cloud-native infrastructure like Kubernetes. The most admired brands around the globe are transforming their businesses with Lightbend, engaging billions of users every day through software that is changing the world. For more information, visit