Even with competition from new languages, the demand for Java developers also remains strong. In fact, Java is among the most in-demand programming languages on the job market, depending on whose numbers you look at. Java developers are reported to have the lowest career switch rate of any profession. It’s a great basis for a steady career. Let’s first look at the list of basic Skills for Java Developer.

List of Basic Skills for Java Developer

However, this isn’t a complete list, below is a list at some of the basic skills needed to become a Java developer:

1. Core Java with Java 8 new features (especially Lambda expression)
2. Object-oriented programming (OOP) concepts and some common design patterns
3. Abstract classes and interfaces
4. Constructors
5. File IO and serialization
6. Collections such as List, Map, Set
7. Access specifiers
8. Exceptions (checked and unchecked)
9. Generics
10. Java keywords such as static, final, volatile, synchronized, transient, this, super, etc.
11. Java virtual machine (JVM) and memory management
12. Multi-threading and synchronization
13. Java Server pages (JSP) and Servlets
14. Web frameworks (such as Struts, Spring, Hibernate)
15. Spring Boot (On high demand)
16. Service-oriented architecture and web services (SOAP/REST)
17. Web technologies such as HTML, CSS, JavaScript, and jQuery
18. Markup languages such as XML and JSON

This is the List of basic Skills for Java Developer that is becoming mandatory work in an organization effectively.

List of Advanced Skills

In addition to the core skills, a Java developer should possess some advanced skills to stay relevant in the constantly evolving tech industry. Here are some of the advanced skills for java developer.

1) Multi-threading and Concurrency: Advanced knowledge of multi-threading and concurrency is essential for developing high-performance and scalable applications.

2) Microservices Architecture: Understanding of microservices architecture is necessary for developing scalable and modular Java applications. Moreover, basic implementation of Microservices Based Applications using Spring Boot is also expected from a Java Developer.

3) Functional Programming: Apart from Lambda Expressions, strong knowledge of functional programming concepts such as Stream API, and optionals are necessary for developing modern Java applications.

4) Performance Tuning: A Java developer should know how to optimize the performance of their applications using profiling tools and techniques such as JProfiler and VisualVM. You should have an ability to identify and resolve performance issues in Java applications.

5) Cloud Computing: Knowledge of cloud computing platforms such as Amazon Web Services (AWS), Microsoft Azure, and Google Cloud Platform (GCP) is essential for developing cloud-native applications.

6) DevOps: Knowledge of DevOps practices such as continuous integration, continuous delivery, and containerization using Docker and Kubernetes is essential for deploying and managing modern Java applications.

7) Security: Knowledge of security concepts such as authentication, authorization, and encryption is essential for developing secure Java applications.

8) Reactive Programming: Knowledge of reactive programming concepts such as reactive streams, reactive programming frameworks like Spring WebFlux, RxJava is essential for developing responsive and resilient applications.

9) Big Data: Knowledge of big data technologies such as Apache Hadoop, Apache Spark, Cassandra and Apache Kafka is essential for developing Java applications that process large amounts of data.

10) Artificial Intelligence & Machine Learning: Understanding of machine learning concepts and frameworks such as TensorFlow, PyTorch and Keras can have an added advantage for developing intelligent Java applications. You should have ability to integrate artificial intelligence and machine learning technologies into Java applications using frameworks like Deeplearning4j and H2O.

Skills for Full Stack Java Developer

Who is a Full-Stack Developer?

A developer who performs all the tasks regarding Front-end, Back-end, the database, and even the integration process. In other words, a developer who can work in both client as well as server application.

• Front-end : HTML, CSS, JavaScript, Angular/React, Vue JS etc.
• Back-end : Java, Core Java, JSP, Servlets, Spring, Hibernate, Spring Boot, Microservices
• Integration Layer : Java Web-service/Restful API
• Database : such as Oracle, MySQL, SQL Server, and any NoSQL Database (MongoDB, Cassandra, Redis etc.)
• Version Control Systems: such as Git, GitHub, SVN etc.
• Testing tools: such as Junit, Selenium etc.
• Development Tools: should be familiar with IDEs such as Eclipse, NetBeans, and IntelliJ IDEA.

Full-stack development is a skill that is in high demand. In order to become a successful full-stack developer, you need to be proficient in all the above skills.