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Java Developers Roadmap Senior

Part III: SENIOR LEVEL ⭐⭐⭐

Vincent VAUBAN

Book 3/3 of the Java Developers Roadmap series, this Senior Level volume dives into the advanced topics you’ll meet in real Java codebases: performance, security, code analysis, utility libraries—and modern frontiers like AI, reactive programming, and Web3. Use it as a roadmap (not a checklist) to level up your technical toolbox with clear explanations, practical examples, and common pitfalls to avoid.

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About

About

About the Book

Java Developers Roadmap — Senior Level is the third book in the Java Developers Roadmap series (Junior → Mid → Senior).

This volume focuses on advanced, real-world technical skills that senior Java developers frequently meet in production: choosing the right utility libraries, understanding performance and JVM behavior, building with security in mind, improving quality with code analysis, and exploring modern domains like AI, reactive programming, and Web3.

It’s not a checklist—you don’t need to learn everything at once. Each chapter is a practical guide to help you understand the essentials, avoid common pitfalls, and pick the right tools when your projects require them.

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Author

About the Author

Vincent VAUBAN

Vincent Vauban is a senior Java full-stack programmer in Lille, VMware vExpert, and Spring Professional certified. For 15+ years, he has built and operated production systems with Spring Boot, Kafka, and Kubernetes, with a focus on observability (Datadog), event interoperability (CloudEvents), and secure, cost-efficient delivery. Vincent teaches thousands of developers on Udemy and writes the Java Fullstack Newsletter, sharing practical guidance on Spring and modern Java. An active member of the French Java community, he regularly gives talks and workshops. This theory-first guide maps the certification objectives to real-world understanding—clear, concise, and production-minded. (Independent work; not affiliated with VMware or the Spring Team.)

Contents

Table of Contents

Roadmap & Legend

  1. Disclaimer (important)
  2. Skill levels (notation)
  3. ! Essentials (blue boxes)
  4. + Good to know (orange boxes)
  5. ~ Possibilities (grey boxes)
  6. Template
  7. Roadmap image

Utility Libraries

  1. ! Utility Libraries
  2. ! Guava
  3. ! Apache Commons
  4. ! Jackson JSON
  5. + Eclipse Collections
  6. + Log4j, SLF4J
  7. ~ Jsoup
  8. + Apache MINA

Performance

  1. ! Performance
  2. + Profiling & Monitoring
  3. + Memory Management
  4. + JVM Performance Tuning
  5. ~ Heap / Stack
  6. ~ GC (Garbage Collection)
  7. ~ JIT (Just-In-Time Compilation)

Security

  1. ! Security
  2. ! OWASP
  3. + JSSE (Java Secure Socket Extension)
  4. + JAAS (Java Authentication and Authorization Service)
  5. + JWT (JSON Web Token)
  6. + OAuth (OAuth 2.0)
  7. + SAML (Security Assertion Markup Language)
  8. + LDAP

Code Analysis

  1. ! Code Analysis
  2. ~ SonarQube
  3. ~ FindBugs
  4. ~ SpotBugs
  5. ~ PMD
  6. ~ Checkstyle

AI

  1. + AI (Artificial Intelligence)
  2. + Machine Learning
  3. + Computer Vision
  4. + Reinforcement Learning
  5. + Deep Learning
  6. + NLP & NLU
  7. + Large Language Models
  8. ~ TensorFlow Java API
  9. ~ DeepLearning4J
  10. ~ DJL.ai
  11. + LangChain4J

Reactive Programming

  1. + Reactive Programming
  2. + Mono & Flux
  3. ~ RxJava
  4. ~ Spring WebFlux
  5. ~ Vert.x
  6. ~ Akka

Web3 & Blockchain

  1. ~ Web3
  2. + Blockchain
  3. ~ Web3j
  4. ~ Corda
  5. ~ Quorum

Keep Learning

  1. ! Keep Learning ❤️

Practice Tests — Spring Professional (6 Full Exams)

  1. What you’ll get
  2. Who it’s for
  3. Scan to visit

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