"This post includes affiliate links for which I may make a small commission at no extra cost to you should you make a purchase."

Close up iPhone showing Udemy application and laptop with notebook


RxJava is a popular library for reactive programming in Java. With its ability to handle asynchronous data streams and perform complex operations in a concise and easy-to-understand manner, RxJava has become a must-know skill for Java developers. If you’re looking to learn RxJava or enhance your existing knowledge, taking an online course or getting certified in RxJava can be a great way to gain expertise in this powerful tool. In this article, we will explore the 10 best RxJava courses and certifications available online.

1. Coursera: Introduction to Reactive Programming in RxJava

This comprehensive course offered by Coursera is perfect for beginners. It covers the basics of reactive programming, including observables, observables transformations, filtering, error handling, and more. You’ll also learn how to use RxJava with different platforms and libraries. The course is self-paced, allowing you to learn at your own convenience. The certification at the end of this course will give you a solid foundation in RxJava.

2. Udemy: RxJava – Reactive Programming with Java

Udemy offers an in-depth course on RxJava, focusing on both theory and practical application. With over 20 hours of video content, this course covers advanced topics such as multicasting, backpressure, and error handling strategies. Additionally, you’ll work on real-world projects to apply your RxJava knowledge in practice. The course is taught by an experienced instructor who provides detailed explanations and examples throughout the course, ensuring a thorough understanding of RxJava.

3. Pluralsight: Introduction to Reactive Programming with RxJava

Pluralsight’s course on RxJava offers a comprehensive introduction to reactive programming concepts and their implementation using RxJava. The course covers topics such as observables, schedulers, operators, and error handling. With hands-on exercises and quizzes, you’ll be able to test your knowledge and reinforce your learning. The course is designed for beginners and intermediate developers who want to gain a solid understanding of RxJava.

4. LinkedIn Learning: Reactive Programming with RxJava

LinkedIn Learning provides a concise yet informative course on RxJava. In this course, you’ll discover how to use RxJava to build reactive applications. The course starts with the foundational concepts of reactive programming and gradually progresses to more advanced topics like testing and debugging. With practical examples and exercises, you’ll gain hands-on experience in applying RxJava in real-world scenarios. Upon completion, you’ll receive a certificate of completion to showcase your RxJava skills.

5. Udacity: Developing Android Apps with RxJava

If you’re specifically interested in using RxJava for Android development, Udacity’s course is a great option. This course introduces RxJava in the context of Android app development and covers topics like threading, error handling, and UI updates. You’ll also build a real-world Android app using RxJava throughout the course. With valuable insights from experienced instructors, this course will equip you with the skills needed to develop robust and reactive Android applications.

6. ReactiveX.io: RxJava Documentation and Tutorials

If you prefer self-paced learning and want to dive deep into the RxJava documentation, ReactiveX.io is an excellent resource. It offers comprehensive documentation, detailed explanations, and useful examples to help you understand and apply RxJava concepts effectively. With its extensive collection of tutorials, you can explore topics at your own pace and refer back to specific sections as needed. Although this is not a formal certification, completing the tutorials and leveraging the wealth of knowledge provided by ReactiveX.io can boost your RxJava proficiency.

7. FutureLearn: Reactive Programming with RxJava

FutureLearn offers a beginner-friendly course on reactive programming with RxJava. In this course, you’ll learn the core concepts of reactive programming and gain hands-on experience with RxJava. The course covers topics such as creating observables, applying operators, handling errors, and working with different types of data streams. With interactive exercises and quizzes, you’ll solidify your understanding of RxJava and its application in reactive programming.

8. edX: Reactive Programming with RxJava

Created by Microsoft, this edX course is designed for Java developers who want to learn RxJava. The course dives into reactive programming principles and applies them using RxJava. You’ll learn about observables, operators, parallel processing, and debugging techniques. The course features hands-on labs, exercises, and graded assignments to ensure a practical understanding of RxJava. Upon completion, you’ll earn a verified certificate to showcase your proficiency in RxJava.

9. StackSkills: RxJava 2 and Retrofit for Android Developers

If you’re an Android developer looking to combine RxJava with other popular libraries, this course offered by StackSkills is ideal. It focuses on integrating RxJava 2 with Retrofit, a popular HTTP client for Android. With hands-on projects and examples, you’ll learn how to handle network requests, parse responses, and apply reactive programming principles using RxJava and Retrofit. This course is perfect for intermediate developers who want to deepen their knowledge of both RxJava and Retrofit.

10. Codecademy: Learn RxJava

Codecademy offers a beginner-friendly interactive course on RxJava. The course covers the basics of reactive programming, observables, operators, and combining streams. With its user-friendly interface and interactive coding exercises, you’ll have immediate feedback on your progress as you learn. This course is perfect for those who prefer hands-on, interactive learning experiences. Although Codecademy does not offer a formal certification for this course, completing it will equip you with the foundational knowledge of RxJava.


Mastering RxJava is an essential skill for Java developers wishing to build reactive and asynchronous applications. With the abundance of online courses and certifications available, you can choose the one that suits your learning style and expertise level. Whether you’re a beginner or an experienced developer, investing time in learning RxJava will undoubtedly enhance your programming skills and open up a world of possibilities in developing efficient and responsive applications. So, pick a course, start learning, and become an expert in RxJava.