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Top 9 Java Reactive Programming Projects
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InfluxDB
InfluxDB – Built for High-Performance Time Series Workloads. InfluxDB 3 OSS is now GA. Transform, enrich, and act on time series data directly in the database. Automate critical tasks and eliminate the need to move data externally. Download now.
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hivemq-mqtt-client
HiveMQ MQTT Client is an MQTT 5.0 and MQTT 3.1.1 compatible and feature-rich high-performance Java client library with different API flavours and backpressure support
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Springy-Store-Microservices
Springy Store is a conceptual simple μServices-based project using the latest cutting-edge technologies, to demonstrate how the Store services are created to be a cloud-native and 12-factor app agnostic. Those μServices are developed based on Spring Boot & Cloud framework that implements cloud-native intuitive, design patterns, and best practices.
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Firefly
Firefly is an asynchronous web framework for rapid development of high-performance web application. (by hypercube1024)
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spring-petclinic-reactive
Reactive version of Spring PetClinic sample application based on Spring Webflux and Cassandra
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Sevalla
Deploy and host your apps and databases, now with $50 credit! Sevalla is the PaaS you have been looking for! Advanced deployment pipelines, usage-based pricing, preview apps, templates, human support by developers, and much more!
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job-winner
A backend API built with Java Spring Reactive and GraphQL to track job applications, manage interviews and monitor job offers efficiently.
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Android-Concepts-Reference
A single repository to learn the basics of Android in Java without all the fluff.
Java Reactive Programming discussion
Java Reactive Programming related posts
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How much of real world programming involves using containers and for loops?
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GitHub - jesperancinha/sea-shell-archiver at 2.0.0
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[Pet project] Consume async api in sync way in client side using Vert.x event bus
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Web Applications from the Future: A Database in the Browser
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Kicking Spring Native's tires
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A note from our sponsor - SaaSHub
www.saashub.com | 1 Sep 2025
Index
What are some of the best open-source Reactive Programming projects in Java? This list will help you:
# | Project | Stars |
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1 | Android-RxJava | 7,531 |
2 | hivemq-mqtt-client | 977 |
3 | Springy-Store-Microservices | 602 |
4 | Firefly | 297 |
5 | spring-examples | 122 |
6 | spring-petclinic-reactive | 84 |
7 | vertx-async-to-sync | 12 |
8 | job-winner | 7 |
9 | Android-Concepts-Reference | 4 |