Java Developers need an extensive range of skills, from in-depth knowledge of the basics to a thorough understanding of the current developments. Experts in Java are also expected to know how the development process works and how to transition between the environments where the code runs.
A well-rounded Java Developer has proficiency in Java full stack developer skills and Java backend developer skills.
Some of the Java Developer key skills include:
Proficiency in Java, with a good understanding of its ecosystems
Sound knowledge of Object-Oriented Programming (OOP) Patterns and Concepts
Familiarity with different design and architectural patterns
Skill for writing reusable Java libraries
Knowhow of Java concurrency patterns
Basic Understanding of the concepts of MVC (Model-View-Controller) Pattern, JDBC (Java Database Connectivity), and RESTful web services
Experience in working with popular web application frameworks like Play and Spark
Relevant Knowledge of Java GUI frameworks like Swing, SWT, AWT according to project requirements
Ability to write clean, readable Java code
Basic knowhow of class loading mechanism in Java
Experience in handling external and embedded databases
Understanding basic design principles behind a scalable application
Skilled at creating database schemas that characterize and support business processes
Basic knowledge of JVM (Java Virtual Machine), its drawbacks, weaknesses, and workarounds
Implementing automated testing platforms and unit tests
In-depth knowledge of code versioning tools, for instance, Git
Understanding of building tools like Ant, Maven, Gradle, etc