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My Journey into the Java World through other Languages

· 2 min read
Joel Maykon
Joel Maykon
Senior Software Engineer

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Starting in the Java ecosystem coming from languages like Python and JavaScript (Node.js) is a transformative experience. Often, Java is seen as "verbose" or "slow" by those accustomed to Python's agility, but the reality of a high-impact corporate environment reveals the true power of the JVM.

In this first post, I want to share how I applied concepts from other languages to accelerate my learning in Java and how this shaped my vision as a Software Engineer.

The Clash of Typing and Structure​

Coming from Python, Java's static typing feels like an initial barrier. However, when you start working on systems with millions of users (like Vivo's Aura project), the safety the compiler offers becomes your best friend.

"Strong typing is not about restriction; it's about contract clarity in large-scale systems."

Lessons from Python for Java​

In Python, I learned to value readability and rapid prototyping. When migrating to Java, I sought to maintain this clarity through:

  • Lombok: To reduce boilerplate and focus on business logic.
  • Streams API: Which brings a functional expressiveness very similar to Python's list comprehensions.

Lessons from Node.js (TypeScript)​

The Node.js ecosystem taught me a lot about asynchrony and fast REST APIs. In Java, I found in Spring Boot and Project Reactor robust tools to replicate this agility with much higher resilience.

Applying Clean Architecture​

One of the greatest benefits of having gone through several languages is realizing that design patterns are universal. I applied Clean Architecture and SOLID concepts I already used in TypeScript directly to my Java projects, which facilitated the maintenance and scalability of microservices.

What's Next?​

This blog will be my technical logbook. I plan to post daily about:

  • Challenges in Kubernetes and Cloud Native.
  • Experiments with Generative AI and LangChain.
  • JVM performance optimization.

If you are migrating languages or just exploring Java 21+, follow the next posts!

Joel Maykon is a Senior Software Engineer and passionate about distributed systems.