WHAT DOES A JUNIOR JAVA DEVELOPER DO?
Published: Nov 19, 2025 - The Junior Java Developer designs, develops, and tests Java-based applications in alignment with user requirements and business objectives. This position is responsible for debugging technical issues, producing design documentation, and recommending enhancements to existing Java infrastructure. The developer also supports multimedia application development and maintains up-to-date knowledge through continuous professional growth.
A Review of Professional Skills and Functions for Junior Java Developer
1. Junior Java Developer Duties
- Training Management: Complete all required training and mentoring sessions.
- Technical Solutions Development: Develop, deliver, maintain, and implement high-quality technical solutions.
- Active Learning: Look to increase both technical ability and domain knowledge through active learning.
- Project Participation: Participation in the project development life cycle.
- Technical Documentation: Contribute to the process of documenting technical requirements for data, workflow, logical processes, hardware, and operating system environment, interfaces with other systems and/or services, internal and external checks and controls, and outputs.
- Documentation Maintenance: Maintain relevant documentation to describe logic, coding/configuration, testing, and changes.
- System Improvement: Continuously strive to make improvements to the existing applications and/or systems and services.
- Quality Assurance: Ensure all development is completed to the required quality standards.
- Technology Awareness: Keep up to date with relevant technology areas.
- Feedback Implementation: Seek out and act upon feedback from team members.
2. Junior Java Developer Job Summary
- Collaboration: Collaborates with leaders, business analysts, project managers, IT architects, technical leads, and other developers, along with internal customers, to understand needs and develop solutions according to business requirements.
- ETL Development: Create and maintain jobs to extract, transform, and load using.
- BI Reporting: Maintain and create new BI reports, maintain existing reports, and troubleshoot performance and design-related issues.
- Issue Resolution: Troubleshot and debugged complex issues.
- Solution Implementation: Identifies and implements solutions.
- Development Lifecycle: Participate in all phases of the development process from inception through transition.
- Production Support: Provide production support and be involved in the maintenance and enhancement of products.
- Object-Oriented Design: Use object-oriented development tools to analyze, model, design, construct, and test reusable objects, including applications that may interface with other systems in an environment committed to Service Oriented Architecture.
3. Junior Java Developer Accountabilities
- Application Knowledge: Provide good application knowledge.
- Solution Delivery: Deliver solutions with high operational and cost effectiveness.
- Application Development: Participate proficiently in application development.
- Best Practices: Apply best practices and design patterns in development.
- Framework Utilization: Use the internal framework in application development.
- Test Coverage: Provide extensive test coverage for delivered software.
- Testing Collaboration: Collaborate in the test and deployment phases.
- Timely Delivery: Deliver in line with timelines and agreed execution plans.
- Continuous Integration: Collaborate in setting up a continuous integration/delivery infrastructure.
4. Junior Java Developer Job Description
- Agile Collaboration: Collaborate in an agile environment with Product Management and business stakeholders to ensure the proper application design and clear specifications.
- Application Development: Develop new applications to meet agreed specifications, analyze and maintain current applications and processes, and diagnose and troubleshoot problems.
- Software Modification: Modify existing software to correct errors and improve the quality, reliability, productivity, and performance of the application, as well as make recommendations for improvement and innovation.
- System Analysis: Analyze system specifications and translate system requirements to manageable and measurable tasks.
- Application Maintenance: Analyze and maintain current applications and processes.
- Problem Diagnosis: Diagnose and troubleshoot problems.
- Innovation Recommendation: Make recommendations for improvement and innovation.
- Team Collaboration: Work with other developers on projects.
- Feature Development: Actively participate in the development and design of new features/products.
5. Junior Java Developer Details and Accountabilities
- Technical Consultation: Consult with users, clients, and other technology groups on issues, and recommend programming solutions, install, and support customer exposure systems.
- Programming Knowledge: Apply fundamental knowledge of programming languages for design specifications.
- Security Analysis: Analyze applications to identify vulnerabilities and security issues, as well as conduct testing and debugging.
- Mentorship: Serve as advisor or coach to new or lower-level analysts.
- Problem Solving: Identify problems, analyze information, and make evaluative judgments to recommend and implement solutions.
- Issue Resolution: Resolve issues by identifying and selecting solutions through the application of acquired technical experience and guided by precedents.
- Independent Operation: Operate with a limited level of direct supervision.
- Subject Matter Expertise: Acts as SME to senior stakeholders and/or other team members.
6. Junior Java Developer Additional Details
- Java Development: Designing and implementing Java-based applications.
- Requirement Analysis: Analyzing user requirements to inform application design.
- Application Design: Defining application objectives and functionality.
- Business Alignment: Aligning application design with business goals.
- Software Development: Developing and testing software.
- Technical Debugging: Debugging and resolving technical problems that arise.
- Design Documentation: Producing detailed design documentation.
- Infrastructure Improvement: Recommending changes to the existing Java infrastructure.
- Multimedia Development: Developing multimedia applications.
- User Documentation: Developing documentation to assist users.
- Professional Development: Ensuring continuous professional self-development.
7. Junior Java Developer Essential Functions
- Software Development: Designs, develops, troubleshoots, debugs, and implements software code using Java, JavaScript, HTML, SQL, and XML for software components of the web applications.
- Web Architecture: Works with graphic designers and other members of a project team to develop the site concept, interface design, and architecture of the website.
- Interface Implementation: Be responsible for interface implementation.
- Database Integration: Integrates web applications with backend databases.
- System Deployment: Deploys large web-based transaction systems using application servers.
- Product Integration: Researches, tests, builds, and coordinates the integration of new products per production and client requirements.
- Test Automation: Evaluates, recommends, and implements automated test tools and strategies.
- System Testing: Designs, implements, and conducts test and evaluation procedures to ensure system requirements are met.
- Test Script Development: Develops, maintains, and upgrades automated test scripts and architectures for application products.
- Test Case Management: Writes, implements, and reports status for system test cases for testing.
- Progress Reporting: Analyzes test cases and provides regular progress reports.
- Testing Expertise: Serves as subject matter specialist providing testing know-how for the support of user requirements of complex to highly complex software/hardware applications.
8. Junior Java Developer Role Purpose
- Core Technology Development: Build, develop, and refine the core technologies.
- Machine Learning Research: Participate in continuous R&D work for the machine learning algorithms.
- Functional Enhancement: Constantly work on diverse and challenging new functionalities (detection of duplicates, sentiment, events, trends, automatic translation of text, content extraction, clustering, image classification, and brand detection).
- Business Influence: Influence business and product delivery in a flexible company structure.
- Team Collaboration: Work together with Data, the search, and the Talkwalker team.
- Production Coding: Write production code for a large-scale application using tools like Cassandra (distributed database), running and processing petabytes of data each day.
- Cross-Functional Teamwork: Work in a multi-disciplinary engineering team from diverse backgrounds.
- Knowledge Sharing: Contribute to the growth of the Java competence center by consolidating and sharing the knowledge and experience with colleagues at Devoteam.
- Product Feedback: Provide feedback to product management regarding user stories, acceptance criteria, and story point estimation.
- Continuous Improvement: Support continuous improvement by investigating alternatives and technologies.
9. Junior Java Developer General Responsibilities
- Cross-Functional Collaboration: Collaborate with system engineers, frontend developers, and software developers to implement solutions that are aligned with and extend shared platforms and solutions.
- SDLC Application: Apply principles of SDLC and methodologies like Lean/Agile/XP, CI, Software and Product Security, Scalability, Documentation Practices, refactoring, and Testing Techniques.
- Code Development: Writes code that meets standards and delivers the desired functionality using the technology selected for the project.
- Feature Building: Build features such as web services and queries on existing tables.
- Performance Assessment: Understand performance parameters and assess application performance.
- Algorithm Implementation: Work on core data structures and algorithms, and implement them using Microsoft SQL Server and Java 8.
- Distributed Systems Development: Development of distributed, event-driven systems for an infrastructure with high availability in several globally networked data centers.
- Technical Architecture: Start with the technical architecture for the implementation, choose a development environment (IntelliJ/Eclipse/Emacs, Mac/Windows/Linux).
- Agile Teamwork: Close cooperation in a cross-functional team working according to agile principles.
- Pair Programming: Collaborate with team members (e.g., pair programming).
- Problem Troubleshooting: Troubleshoot coding problems quickly and efficiently to ensure a productive workplace.
- Task Coordination: Participate in planning tasks and supporting team leaders in the coordination of activities.
- Requirement Documentation: Elicit and document client requirements.
- Software Design: Design software modules that interact with a larger project.
- Development Practices: Participating and developing according to the team's best practices.
- Unit Testing: Performing unit tests on developed components and leading other tests according to team methods and procedures.
10. Junior Java Developer Key Accountabilities
- Solution Development: Use the right combination of clean code, APIs, analytics, and infrastructure to build a user-focused solution.
- Team Leadership: Guide and contribute to a development team to learn new tools and techniques, identify and implement system improvements, and mentor teammates.
- Architectural Implementation: Help the customer overcome their most difficult challenges using the latest architectural approaches like microservices, alongside open source frameworks and tools like Spring Boot.
- System Enhancement: Create a custom system enhancement with consistent performance and scalability, directly impacting the client's mission by enhancing a mission-critical module that directly impacts science research.
- Mentorship: Mentor, provide positive code reviews, and create opportunities to learn new tools and skills, focusing on growing as a team to make the best solutions for the customers.
- Agile Participation: Actively participate in a highly collaborative agile development process.
- Software Maintenance: Take over responsibility for the further development, enhancement, and maintenance of software solutions.
- Business Logic Design: Help shape the software’s business logic in close cooperation with the product management team.
- Framework Development: Develop a framework, or implement new architectural principles.
- Technical Documentation: Involved in the technical documentation of the software products and functionalities.
- Full-Stack Development: Be responsible for developing software (both backend and frontend).
- Quality Assurance Collaboration: Interact with QA in the teams to make sure everybody understands what has to be delivered and that all new functionality is covered with tests.
11. Junior Java Developer Details
- Java Software Development: Design, document, implement, and unit test robust Java software.
- Database Management: Cultivate relational database structures and queries for efficient update and retrieval of data.
- Web Interface Design: Web-based user interfaces to identify, administer, and compellingly present personalized information.
- Team Collaboration: Participate as part of a cohesive, focused team in project planning, architecture, design discussions, and code reviews.
- System Integration: Perform additional system integration and QA tasks to deliver software on time.
- Requirements Specification: Participate in the elicitation and specification of requirements.
- Application Development: Researches, designs, develops, and/or modifies Java/J2EE applications using technologies such as JSP, SQL, and XML.
- System Planning: Involved in planning of the system and development deployment, as well as responsible for meeting software compliance standards.
- Unit Testing: Development and execution of unit tests.
- Technical Problem Solving: Solve complex technical issues under general supervision.
- Technical Implementation: Lead the technical implementation and development of defined user stories for implementing a multi-channel suite-based ecommerce platform.
- Requirements Analysis: Work closely with internal departments to understand technical and functional requirements and develop the code with a high degree of quality.
- Engineering Advisory: Advise internal stakeholders on technical and engineering best practices and make recommendations for process improvements.