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Best Java Experts, Bloggers and Influencers To Follow In 2021

Feb 4, 20216 min read

Dawid Karczewski

Senior full stack developer and CTO at Ideamotive.

According to the 2020 HackerRank Developer Skills Report, Java is 2nd most widely known programming language globally. One of the most significant advantages of this language is undoubtedly a vast community, which is willing to share knowledge and support each other. 

 

 

In the Java environment, there is a mass of well-known and respected Java experts who have many fans and followers. 

 

If you are wondering who to get inspiration from about this programming language — our list can help you. Here is a list of the top 10 Java Influencers to follow in 2021!

 

Check also our other lists:

1. Trisha Gee

 

Blog: https://trishagee.com/blog/ 

Twitter: https://twitter.com/trisha_gee 

 

Our list is opened by a woman - a Java Champion, Trisha Gee, who is, above all:

  • a team leader of the Java Developer Advocacy at JetBrains, 
  • leader of the Sevilla Java User Group, 
  • respected blogger,
  • author of essential publications,
  • creator of Java courses.

Trisha loves sharing knowledge and helping other software developers at every step of their journey. She shares her valuable tips both on her blog and books: "97 Things Every Java Developer Should Know", "What to Look for in a Code Review" and "Developer, Advocate!".

 

What's more, if you want to keep up to date with the news in the Java world, Trisha creates something just for you. She produces a monthly newsletter named "Java Annotated Monthly" in which she summarises every month in the Java world.

2. Vlad Mihalcea

Blog: https://vladmihalcea.com/blog/ 

Twitter: https://twitter.com/vlad_mihalcea 

 

 

The second place on our list belongs to Vlad Mihalcea - the next Java Champion, JPA expert, CEO of Hypersistence, and the top Hibernate ORM committer.

 

His book called "High-Performance Java Persistence" is highly regarded in the Java environment. Vlad is also the author of numerous courses, training, and workshops focused on Java and SQL. He is active primarily on his blog and Twitter and has also created some useful tutorials on YouTube

 

People appreciate it for its exciting hints, but also its accurate insights and reflections.

3. Nicolas Fränkel

Blog: https://blog.frankel.ch/ 

Twitter: https://twitter.com/nicolas_frankel

 

 

The next expert on our list is a software developer with over 15 years of experience, currently working for Hazelcast. He usually works on Java and Spring, but he is mainly focused on Testing, DevOps, Rich Internet Applications, and CI/CD. 

 

Nicolas shares his knowledge and experience both on his blog as well as in his books:

He is also very active on Twitter, so we recommend to follow his channel.

4. Josh Long

Blog: https://joshlong.com/ 

Twitter: https://twitter.com/starbuxman

 

 

Are there any Spring lovers here? If so, this Java expert is undoubtedly worth your attention.

 

Josh Long is one of the best known, valued, and willing to share this framework's experts' knowledge. He is a Java Champion, Spring Developer Advocate, and Kotlin Google Developer Expert. 

 

He published six books, such as "The Reactive Spring Book", or "Cloud Native Java." He is an author of numerous popular video trainings, podcaster, blogger, and an open-source contributor.

 

He regularly publishes new content (he publishes even tens of tweets a day!), so it is worth following him in 2021. His Twitter profile has almost 42,000 followers. Will you be the next one?

5. Javin Paul

Blog: https://javarevisited.blogspot.com

Twitter: https://twitter.com/javinpaul

Website: https://www.java67.com

 

The next Java expert on our list has recently created "a Twitter list for #Java Devs to follow on 2021", in which he included, among others, Vlad Mihalcea, Trisha Gee, and... himself.

 

 

But we don't think it's immodesty because Javin Paul deserves a place on this list. Just take a look at his Twitter. Every day, he publishes a few exciting posts related to Java and other programming languages and the whole IT industry.

 

But not only his Twitter is worth following. His blog is a real chest of knowledge, where you can find information about Java, Spring, Hibernate, SQL, programming courses, and much more. You just need to see it.

6. Adam Bien

Blog: https://adambien.blog/

Twitter: https://twitter.com/AdamBien 

 

 

2167 - this is a number of articles you will find on another Java expert's blog from our list. But it is not over. Adam Bien is also an experienced trainer who shares his video courses, podcasts, and many more useful resources for Java Developers. He also runs virtual workshops, which you can sign up for through his website. 

 

What is more, Adam is an active Twitter user, followed by over 35.000 people.

7. Thorben Janssen

Website: https://thorben-janssen.com/

Twitter: https://twitter.com/thjanssen123 

 

 

We have already recommended the Spring expert profile; now it is time for an influencer specializing in Hibernate. And we are sure that Thorben Janssen is the person who is worth following in 2021 if you use this tool.

 

First of all, he is an author of an Amazon bestselling book, “Hibernate Tips. More than 70 solutions to common Hibernate problems”. You will there find many valuable tips useful in your everyday work. 

 

Moreover, he is the author of many courses, video tutorials, and other Java and Hibernate materials. You can also meet him at world-class industry conferences on Java, where he shares his knowledge about Hibernate and related topics.

8. Eugen Paraschiv (Baeldung)

Website: https://www.baeldung.com 

Twitter: https://twitter.com/baeldung 

 

 

Here is another Spring expert on our list. Eugen, known as Baeldung, is an experienced developer who focuses primarily on the topics related to:

- Spring,

- Rest,

- Java, 

- Spring Security, 

- RESTful APIs,

- Linux,

- Jackson, 

- Kotlin.

 

He is the author of many comprehensive certificated programming courses and several free ebooks, which you can download for free from his website

 

He is very active on Twitter, where he shares useful links and interesting observations.

9. Jakob Jenkov

Website: http://jenkov.com 

Twitter: https://twitter.com/jjenkov 

 

Jakob Jenkow is the owner of one of the most extensive websites with Java tutorials for Software Developers and “Technopreneurs”: http://tutorials.jenkov.com/. He is the creator of a mass of learning materials related to Java, JVM, Scala, Web Software, Mobile Software, Data Science, and many more.

 

We recommend following his Twitter account and his YouTube channel, where he regularly publishes video tutorials.

 

Still not convinced it is worth following him in 2021? Well, just look at these numbers:

 

10. Arun Gupta

 

Twitter: https://twitter.com/arungupta 

 

Arun Gupta is a well-known Java Champion and principal open-source technologist at Amazon Web Services. For over ten years, he has been building Java communities at Oracle, Sun, Couchbase, and Red Hat. He. is a founder of Devoxx4Kids USA - an organization that allows children to learn to code.

 

On his Twitter account, Arun shares posts related to AWS's technological updates, AWS events, and the use of Java in his work for Amazon. So, if you're interested in these topics - you should start following him as soon as possible.

11.  Rich Hickey

 

Twitter: https://twitter.com/richhickey 

Website: https://clojure.org 

 

Rich is a father (or: as you prefer - creator) of Clojure — a programming language that interoperates with Java and runs on the JVM. 

 

Moreover, he is also a creator of:

  • Datomic — the functional database, 
  • ClojureScript —  compiler for Clojure, 
  • Extensible Data Notation (EDN) — a data format.

If you are interested in Clojure, you should follow him on Twitter because he publishes the latest news on this language.

12. Cay Horstmann

 

Blog: http://horstmann.com/unblog/index.html

Website: www.horstmann.com

Twitter: https://twitter.com/cayhorstmann 

 

Cay S. Horstmann is a Professor of Computer Science at San Jose State University. 

 

He is a professional software developer and experienced consultant for large organizations on Internet programming, Java, C++, Python, and Windows. 

 

He wrote many well-known books, such as Big Java, Big Java: Late Objects, Big C++, or C++ for Everyone, or Core Java.

 

On his blog, you will find many technical articles that may be useful at work, so we recommend visiting this site.

13. Rod Johnson

 

Blog: https://blog.atomist.com/author/rod/

Twitter: https://twitter.com/springrod 

 

We have already mentioned the programmers who specialize in the Spring framework, and now it is time for its creator. Rod Johnson is an Australian software developer and founder of Atomist company. 

 

He is also an author of three books:

  • Expert One-on-One J2EE Design and Development 
  • Expert One-on-One J2EE Development without EJB
  • Professional Java Development with the Spring Framework

 

If you like his work, you have to follow him in 2021.

14. Jessica Joy Kerr


 

Blog: https://jessitron.com/blog

Twitter: https://twitter.com/jessitron 

 

Jessica Kerr is a lead engineer at Atomist, where she creates delivery automation applications using TypeScript, Clojure, Java, and other technologies. She speaks at many world-wide conferences and writes a blog, where she shares her experience and helps other developers stay ahead of emerging technologies. 

 

She is very active on Twitter, where she publishes comments related to Java and many more.

15. Ideamotive Blog

 

If you are looking for interesting tips, tutorials, and news related to Java, we recommend you to follow our blog as well. 

 

You will find here always proven, up-to-date knowledge from our Java experts

 

If you want to learn more, you can also follow us on Twitter or LinkedIn

 

We hope that the knowledge we provide will be useful to you.



Do you follow some other Java experts who we didn’t mention? Please write to us. We’d be happy to expand our list!

Dawid Karczewski

Dawid is a full stack developer experienced in creating Ruby on Rails and React Native apps from naught to implementation. Technological superhero, delivering amazing solutions for our clients and helping them grow.

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