Java Developer Job Description, Salary,
Skills, Interview Questions, And More

Java is a class-based, object-oriented programming language used in developing mobile and web applications, embedded systems, big data processing, etc.


According to Stack Overflow, it is the most widely-used programming language — more than 64% of developers worldwide use JavaScript in some form or other.


It comes as no surprise the demand for Java developers sees no signs of waning. If you're aspiring to become one, here's a comprehensive guide to help you out.


We'll cover everything there is to know about the Java developer job description, salary, skills, interview questions, and many more. Read on.


1. Java Developer Job Description


A Java developer is a programmer responsible for designing, developing, and managing Java-based applications according to business needs.


It's one of the most highly-in-demand jobs in the IT industry, with many large organizations implementing software systems and other backend services through Java programming.


Java developers are well-versed in the Java programming language. They may develop web applications and other features to make a website more dynamic and usable. Or they can also dabble in app development.


Whatever the organization or business needs, Java developers will be present throughout the entire software development lifecycle. From writing code and testing to debugging, managing, and updating software — none of these would be possible without their expertise. With much of the digital world's apps and systems using Java, a Java developer career is lucrative, now more than ever.


2. Java Developer Salary


JavaScript and Java rank 29th and 34th among the highest-paying programming, scripting, and markup languages in the Stack Overflow Developer Survey 2021.


USD 54,049 is the median annual salary for JavaScript-related positions. Meanwhile, the median salary for Java-related positions is about 3,000 less, at USD 51,888.


The salary range depends on a host of factors, such as:


  • Level of experience
  • Expertise in other technologies and programming languages
  • Language skills
  • Seniority
  • Company
  • Location
  • Position


For example, a Java developer working for a Singapore business will earn significantly more than a developer in India. Likewise, a junior or entry-level Java developer will make less than a senior developer.


However, the salary difference across different countries is much more noticeable. Here is list of the average annual Java developer salary per country (in USD)*:


  • USA - $112,000
  • Canada - $94,562
  • Denmark - $85,041
  • Germany - $77,297
  • UK - $55,728
  • Singapore - $53,220
  • Sweden - $53,164
  • France - $51,770
  • Japan - $44,844
  • South Korea - $27,786
  • Brazil - $20,112
  • Philippines - $10,244
  • Vietnam - $9,122
  • India - $7,386


Java development is a high-paying job, no matter where you find employment. But the USA remains the highest-paying country, with an average salary of more than $110,000 monthly.


Vietnam pays Java developers the least, at approximately 93% less than the USA. Singapore and Sweden remain competitive in the middle, averaging $53,192.


Remember, these figures reflect the general average and don't consider seniority and level of experience. For instance, you may earn less as an entry-level hire with 1-5 years of experience than a senior developer with 10-15 years working with Java.


Also, many organizations provide benefits and bonuses to top-performing employees. Therefore, developing your skillset and broadening your portfolio must be your top priorities to becoming a successful Java developer.


3. Java Developer Job Responsibilities


There are different types of Java developer jobs available in the market, namely:


  • Java Programmers
  • Java Web Developers
  • Java WebMasters
  • Java Software Engineers


A day in the life of a Java programmer involves software programming, developing, testing and information gathering. They often specialize in a specific field.


For example, a Java video game programmer will help deploy sounds, graphics, responses, or behaviors in the game. They will test each program after developing it, ensure proper functioning, and train clients and end-users on how the programs work.


Meanwhile, Java web developers focus solely on creating user-friendly websites based on their clients' specifications. They utilize their technical expertise and know-how to create applications, programs, and other related software for easier web navigation. Java web developers must ensure all website elements are working as intended, be it drop-down menus, cascading lists, flash messages, etc.


Java WebMasters or Java web administrators are responsible for maintaining websites, updating security certificates, and troubleshooting problems (among other duties). They must also validate and test HTML code and ensure the website is compatible with new operating systems and web browsers.


Lastly, Java software engineers create, design, and implement software based on their clients' needs. They are involved in the entire software development lifecycle, even after deployment. Java software engineers must address any compatibility issues and install updates as necessary.


More often than not, the roles and responsibilities of a Java developer intersect. Diversify your skills to succeed as a Java developer.


Below is a general list of other duties and responsibilities a Java developer may be exposed to in their career path:


  • Examine user requirements to set business objectives
  • Determine system functionality and features
  • Develop and test software and web applications consistent relevant to business objectives
  • Build and test software
  • Identify and troubleshoot any technical issues that arise
  • Create detailed process documents to assist other developers
  • Suggest amendments and changes to the existing Java infrastructure
  • Write and test code
  • Know and understand best practices in Java development
  • Assess user requirements
  • Build multimedia applications compatible with multiple devices
  • Consistently lookout for new alternatives and technologies to improve Java architecture


4. Java Developer Skills


Senior Java developers understand that the industry is ever-changing. They are constantly learning new technologies, finding alternatives, and doing away with deprecated codes.


Meanwhile, aspiring Java developers may find the learning curve too steep. There is a plethora of fundamentals, technical concepts, and hard skills to learn even before they begin writing their first Java program.


Nevertheless, whether you're a junior or senior developer, it pays to have a set of basic and advanced skills all Java developers possess.


A successful career in Java ultimately hinges on how well you can set yourself apart from your peers. Employers generally look for professionals who can meet their clients' needs and specifications.


Before sending in your resume or filling out your application form, make sure you have the following:


Java Developer Hard Skills

  • Object Oriented Programming - Deals with the four pillars of Java: Abstraction Polymorphism, Inheritance, Encapsulation
  • System Design And Architecture - Java developers must understand the basics of software design to ensure projects are scalable and maintainable.
  • JVM (Java Virtual Machine) Internals - JVM elements, their functions, JIT, JVM options, garbage collections, collectors, etc. Java developers create stable and high-performance applications. They must also identify bottlenecks.
  • Web Technologies - Dynamic web development, markup languages, HTML, CSS, JQuery
  • Java Testing Tools - JUnit, Mockito, Selenium, TestNG, DBUnit, Arquillian, FitNesse, Cucumber, Spock Framework, etc.
  • Java Build Tools - Jenkins, TeamCity, Maven, Travis CI, CMake, Apache Ant, etc
  • Big Data Platforms - Cloudera, Oracle, MongoDB, Tableau, etc.
  • Code Version Control - VCS (Version Control Systems) such as Helix Core, Git, ClearCase, TFS, SVN, etc.
  • Web Frameworks - The preferred class solutions for developing feature-rich mobile apps with minimal coding. Top web frameworks include Spring MVC and Play.
  • Unit Testing - Can automate tests more efficiently with JUnit and TestNg.
  • Java EE Components - Must know how to develop server-side apps through Servlet Java Beans and Java Server Pages.
  • DevOps Tools and Principles - Must understand DevOps concepts such as continuous integration (CI), continuous deployment (CD), and Jenkins.
  • Application Containers - Must know how to use JBoss and Jetty to authenticate users, log in and out, establish database connections, etc.


Java Developer Soft Skills

  • Team Player - Any professional Java developer must be able to perform well and be comfortable working with others within a team.
  • Adaptability - With the constant release of new Java system versions, Java developers must adapt to these changes.
  • Time Management - Java developers must know how to prioritize, plan, and execute to ensure a project is completed on or before the target deadline.
  • Problem-solving - Java developers will need problem-solving skills to implement solutions and deliver products that meet the end user's expectations.
  • Organization - Java developers must integrate other task management tools to stay organized and efficiently manage their workload.
  • Communication - Java developers will constantly collaborate with other team members to solve problems and prevent an escalation of conflict. They must actively communicate with their clients, verbally or non-verbally.
  • Creativity - Creative Java developers can develop software solutions that address the client's complex requirements. They will need to share ideas and foster critical thinking.
  • Attention to Detail - Java developers need to be meticulous to ensure their code is accurate and functional.


5. How To Become A Java Developer


Becoming a professional Java developer is no easy feat, but it is entirely possible. A winning candidate has the drive and enthusiasm to learn the ins and outs of Java development.


They are deeply invested in enriching their technical knowledge through hands-on software development and taking on different courses.


Below is a brief roadmap as you start your Java developer career:


Step 1: Complete A Relevant Degree

Many Java developers have obtained a bachelor's degree in:


  • Computer Science
  • Information Technology
  • Software Engineering


But it is entirely possible to learn Java through self-teaching. Most developers learn on the job or through online courses, forums, communities, tutorials, etc.


Step 2: Get An Internship

One of the best ways for any Java developer to gain experience is through an internship.


Internships offer them a firsthand look into real-world situations where their skills will be useful. They also expose developers to actual programming, debugging, troubleshooting, and other relevant hands-on work.


Step 3: Build Your Portfolio

A portfolio is a great way for a Java developer to showcase their programming skills. They can build their portfolio by developing web applications and management systems for various niches.


Step 4: Consider Further Studies

Many developers engage in further studies to increase their chances of employment.


For example, you can consider joining Java developer boot camps, training programs, or workshops, to acquire certification.


6. Java Developer Interview Questions


Java has become a household name among programmers and developers. Because there is a high demand for Java developer roles in the market, the competition is nothing short of fierce.


Generally, the higher you climb up the ladder, the more difficult the application process becomes.


Companies need only skilled and qualified developers in their teams. So, they have to maximize the interview and technical exam portion to determine who is and isn't a good fit.


Here are some of the most common Java developer interview questions to help you prepare:


  • What are the features of Java?
  • What are Java Constructors?
  • What are access modifiers in Java?
  • What is the Java reflection API?
  • What are OOP concepts?
  • What are the different JDBC drivers?
  • What is static import in Java?
  • What are the differences between JDK and JRE?
  • What is a ClassLoader?
  • What does aggregation mean in Java?


Luxoft Is Hiring Java Developers!


Now's your chance to begin your IT career path with Luxoft! We are the world's top digital solutions provider, operating in over 40 cities, and we want YOU to be a part of our team.


Get in touch with us now via email ( or click here to view our Java developer roles and other career opportunities.


Frequently Asked Questions About Java Developer Job Description


Can I Learn Java Without Knowing Coding?


Learning Java is easier if you have a background in C programming language. However, learning Java without any coding background is still possible. There are many tutorials and reference materials available online for your use.


What Is The Highest Salary Of A Java Developer In Singapore?


The highest salary for a Java developer in Singapore (in SGD) is $12,700* a month, or $152,400 annually. Meanwhile, the lowest is $4,550* monthly or $54,600.


Is Being A Java Developer A Good Career?


Yes. As the most widely-used and popular programming language, Java is used everywhere, from desktop GUI applications and management systems to server applications for different industries.


You'll be met with little resistance in finding a Java developer position that aligns with your goals and skills.


How Fast Can You Learn Java?


You'll need at least 1- 2 years of experience to become confident in your Java skills. Ideally, you should spend at least 3 hours every day practicing coding, writing basic applications, and familiarizing yourself with the language.


*Note: The salary figures indicated in this article were collated from multiple job portals and salary comparison platforms such as Glassdoor,, Indeed, AmbitionBox, PayScale, Salary Expert, and Salary Explorer.