What Does A Java Software Engineer Do?

WHAT DOES A JAVA SOFTWARE ENGINEER DO?

Published: Nov 17, 2025 - The Java Software Engineer develops robust, scalable, and efficient backend systems and APIs to support both desktop and mobile applications. This role involves writing clean code, creating unit tests, resolving production and non-production issues, and ensuring optimal performance and availability of distributed cloud systems. The engineer also contributes to front-end configuration, bug fixing, and maintaining high server uptime across deployments.

A Review of Professional Skills and Functions for Java Software Engineer

1. Java Software Engineer Details

Systems Analysis: Analyze the study's current systems and requirements.
SDLC Planning: Help form the software development lifecycle and produce accurate estimates on new development.
Platform Architecture: Contribute to the design and architecture of the core platform.
Feature Development: Build the most complex and crucial parts of the system and help build new features.
Team Leadership: Be responsible for teaching, mentoring, and guiding junior team members.
Problem Prevention: Help them avoid problems by harnessing previous experience.
Agile Optimization: Provide input on Agile processes and help the team to constantly get better.
Velocity Management: Contribute to generating consistent development velocity via skills and by helping the rest of the team find efficient paths forward.

2. Java Software Engineer Roles and Responsibilities

Code Implementation: Contribute to the implementation and maintenance of efficient, reusable and reliable code.
Customer Solutions: Solve a variety of customers' needs while considering existing technology, architecture and processes.
Code Quality: Help improve code quality, organisation and best practices throughout the entire development process and in coordination with team objectives.
Engineering Collaboration: Actively participate in team engineering processes and design meetings.
Code Reviews: Perform code reviews with the view of continuously improving quality and efficiency.
Test Strategy: Contribute to test strategy by helping define test cases, authoring unit tests and driving automation.
Growth Mindset: Bring a growth mindset to every task, sharing ideas and opinions with an attitude and appetite for improvement.
Outcome Ownership: Challenge, pursue outcomes and take ownership of tasks in a collaborative environment.

3. Java Software Engineer Key Accountabilities

Portal Development: Assume a role as a developer for the internet portal to the legacy system.
Problem Analysis: Conduct analysis of moderate-complexity programming problems concerning software product applications.
Requirements Support: Assist in the analysis of marketing and customer requirements.
Technical Alternatives: Help define technical alternatives for the organization's software product applications.
Requirements Review: Review product requirements and provide technical input.
Specification Input: Provide input to design and functional specifications.
System Interpretation: Participate in the interpretation of system design and objectives.
Design Conversion: Convert the design and functional specifications into the appropriate programming language.
Code Integration: Test and integrate new code into the existing software base.
Program Debugging: Perform debugging of programs and routines.
Unit Testing: Conduct unit tests on subsystem modules.
System Testing: Assist with final system integration testing, software QA testing, and customer acceptance testing.
Software Documentation: Create the documentation necessary to support new and existing software applications.
Field Support: Provide on-site support for field installation and certification of applications.

4. Java Software Engineer General Responsibilities

Product Engineering: Design, develop, analyse, document and support testing of products, systems, or subsystems.
Cross-Team Collaboration: Coordinate with other teams at the sub-system and system level to identify software needs and solutions.
Process Improvement: Improve engineering standards, tooling, and processes.
Test Development: Develop and execute test procedures for software.
Issue Resolution: Proactively identify issues, bottlenecks, gaps, or other areas of concern or opportunities and work to either directly effect change or advocate for that change.
Agile Delivery: Work in an agile environment, Scrum or Kanban.
Technical Documentation: Document best practices, guides, systems design, reference architectures and implementations.
Code Review: Participate in design and code reviews.
Architecture Evolution: Contribute to the evolution of architecture to make it more flexible and easier to use.

5. Java Software Engineer Roles

Agile Delivery: Work within an agile team to deliver robust solutions that meet the functional and technical requirements of the customer.
Requirement Shaping: Work with colleagues and Product Owners to help shape requirements.
Quality Adherence: Show strict adherence to technical and quality standards within agreed timeframes.
Standards Improvement: Contribute to improving standards and working practices.
Quality Advocacy: Champion the need for a "quality first" approach and work with the Quality Community to help establish optimum testing coverage.
Continuous Learning: Responsible for actively learning and keeping up to date with developments in the technical and professional area of expertise.
Sustainable Development: Maintain business agility through a sustainable approach to software development.
Continuous Improvement: Embrace the culture of continuously improving services by being bold and innovative.

6. Java Software Engineer Responsibilities and Key Tasks

AI Backend Development: Develop AI-based backend applications.
Code Reusability: Build reusable code and libraries for future use.
Performance Optimization: Optimize the application for maximum speed and scalability.
Security Compliance: Implement security and data protection in healthcare standards.
Data Storage Design: Handle the design and implementation of data storage solutions.
Test Development: Responsible for developing unit and integration tests.
Deployment Strategy: Define deployment strategy on cloud and on-premise solutions.
Backend Integration: Integrate user-facing elements developed by a front-end developer with server-side logic.

7. Senior Java Software Engineer Duties and Roles

Architecture Support: Assist in architecting, designing, developing, and implementing complex applications and core utilities.
Architectural Collaboration: Collaborate with divisional architects, lead engineers and other senior engineers to set architectural standards for the division.
Security Compliance: Understand governing security and compliance policies and ensure applications are designed with security and compliance from the beginning.
Team Mentoring: Provide a level of mentorship to team members, including outsourced resources.
Domain Expertise: Develop business domain expertise and provide technical support to SMEs in that business domain.
API Governance: Proactively ensure consistent, well-documented, and flexible APIs at the system and sub-system level.
Best Practices: Know and champion best practices in many areas of software engineering (security, testability, reliability, scalability).
Quality Assistance: Assist in helping QA to develop quality and performance monitoring programs for specific systems, sub-systems, and components (automated tests covered).

8. Lead Java Software Engineer Duties

Java Application Development: Design and develop high-volume applications with the latest Java technologies.
Solution Compliance: Ensure solutions are in line with compliance, specifications, and customer requirements.
Team Management: Effectively manage a team of developers to ensure deadlines are met and successful project delivery.
Sprint Planning: Participate in sprint planning and estimation, breaking down user stories into pieces.
Code Review: Participate in peer-level code reviews.
Issue Resolution: Proactively identify issues and collaborate with the team to solve them.
Stakeholder Collaboration: Work with stakeholders, including the Executive, Product, Enablement, and Design teams.
Technical Support: Assist with technical issues and project delivery.

9. Java Software Engineer Details and Accountabilities

Agile Collaboration: Work in a dynamic and Agile team.
API Development: Develop and deliver RESTful API and third-party integrations in an iterative fashion, working as part of a feature team using Agile methodologies.
Testing Practices: Follow good software development practices (TDD, Unit Testing, Integration Testing).
Work Planning: Plan and monitor work to meet time and quality targets.
Technical Growth: Improve knowledge of tools, techniques and technologies that are pertinent to the design, implementation and maintenance of the software being delivered.
Process Improvement: Participate in improving processes and the implementation of best practices in software development.
Design Participation: Responsible for being part of the software design within the Agile team.
Code Implementation: Implement code and test projects in accordance with designated standards, style and quality.
Code Quality: Create and review code with a focus on high quality.
Feature Maintenance: Support and maintenance of existing features in the Objective product suite.

10. Java Software Engineer Responsibilities

Codebase Mastery: Work within an existing development team and master the existing code base.
Feature Implementation: Assist implementation of complex features in each build.
Project Ownership: Maintain ownership of projects assigned.
Large-Scale Delivery: Work on large projects that span multiple build cycles.
Process Adherence: Follow and enhance existing development processes.
Build Coordination: Work closely with engineering/IT to ensure efficient and stable builds.
Team Collaboration: Work independently and within a team.
Issue Communication: Identify, document and communicate technical issues and risks across teams.

11. Java Software Engineer Functions

Solution Development: Responsible for solution design and hands-on software development.
Cross-Team Collaboration: Work closely with leads, designers, and product managers.
Global Delivery: Deliver features and functionality to 10+ million customers all over the world.
Career Growth: Take charge of career development by seizing opportunities to work across different teams, technologies, and roles.
Technical Proposals: Develop and iterate on technical proposals, outlining how solutions will be structured and developed.
End-to-End Solutions: Develop solutions that have been designed from the ground up through to deployment into production.
Performance Optimization: Identify and address performance bottlenecks within the application and broader infrastructure.
Technical Participation: Participate in design meetings, hiring interviews, and code reviews.
Advanced Debugging: Perform debugging, benchmarking, and building awesome things in general.

12. Java Software Engineer Job Description

Product Collaboration: Collaborate closely with Product, Design, and QA to iterate on the design, implementation and deployment of the product.
Backend Development: Build and manage new backend systems and applications.
Scalability Awareness: Understand reliability and performance, and proactively find and address issues to build software at scale.
Technical Documentation: Write clear and concise technical design documents and gather feedback from the team and the broader engineering organization.
Engineering Mentorship: Provide leadership and mentorship for junior engineers through code reviews and technical discussions.
Perspective Seeking: Seek different perspectives and solicit honest feedback.
User Delight: Take delight in delighting users.
Partner Support: Care about studio partners and want to help them grow their business.

13. Java Software Engineer Tasks

Code Development: Write code and develop unit tests, build prototypes, solve issues, profile and analyze bottlenecks.
Issue Identification: Identify production and non-production application issues.
API Design: Design and perform robust APIs to support mobile and desktop clients.
Cloud Scalability: Manage and optimize scalable distributed systems on the cloud.
Bug Fixing: Responsible for bug fixing and making sure the system is running well.
Performance Optimization: Optimize web applications for performance and scalability.
Application Configuration: Configure the usability of all front/back-side applications.
Server Stability: Maintain a stable server with near-zero downtime.

14. Java Software Engineer Essential Functions

Multilanguage Development: Develop software in a number of programming languages, including Java, C++ and PL/pgSQL.
Feature Leadership: Lead development of specific features or components.
Technical Contribution: Responsible for being a key contributor, overseeing aspects of analysis and design.
System Enhancement: Design, develop and test system enhancements/changes.
Technical Documentation: Produce technical analysis/design documents/specifications.
Task Estimation: Produce and justify estimates for design/development tasks.
Support Collaboration: Work with Support to explain and hand over new functionality.
Requirement Discussion: Discuss business requirements with end users and/or analysts from other project teams and recommend possible solutions/options.
Staff Mentoring: Responsible for mentoring more junior staff.

15. Java Software Engineer Responsibilities and Key Tasks

Cross-Functional Collaboration: Work with cross-functional teams that value getting great features in front of users.
Production Delivery: Measure success in this way, and by producing working features in a production environment.
Process Improvement: Pursuit of these qualities means that employ modern software tools and practices and constantly look for ways to improve processes and products.
Tool Selection: Use the right tool for the job, practice shared code ownership through collaboration and reviews.
Pair Programming: Pair program on difficult problems and test just about everything.
Adaptive Engineering: Adapt software and structure to cope with new problems, but still make sure to give ideas a chance to mature.
Quantitative Expertise: Work in this environment will require having deep demonstrable experience in one or more of these domains and coming from any discipline with a quantitative mind that enables one to recommend well-thought-out and practical solutions to a wide spectrum of challenges.
Team Contribution: Responsible for being a key member of the growing FOS team, comfortable working cross-functionally with software engineers in the core engine, data scientists, business analysts, product managers and crucially factory-based SMEs.
Team Integration: Work closely with other teams to integrate and deploy work.
Multi-Stack Collaboration: Work with teams developing in other languages and stacks.

16. Java Software Engineer Duties

Spring Integration: Develop integrations and APIs using Spring Framework.
Data Pipelines: Develop data ingestion pipelines to populate on-premises or cloud-based data lakes, NoSQL solutions, etc.
Data Modeling: Translate business rules and requirements into data objects, produce associated data mappings and write abstracted, reusable code components accordingly.
Solution Deployment: Deploy and integrate solutions on the cloud and on-premises.
Technical Facilitation: Facilitate technical meetings with client staff and advise the client on technical option analyses based on leading practices.
Requirement Delivery: Develop and deliver solutions according to requirements.
Defect Resolution: Investigate, analyze and fix defects located in the existing solution.
Team Communication: Communicate progress with other team members and QA.
Product Ownership: Responsible for a subpart of the product.
Developer Mentoring: Mentor developers in junior positions.

17. Java Software Engineer Functions

REST Service Development: Develop REST-based services using the appropriate computer languages while adhering to team development standards and practices.
Test Design: Design and specify test procedures, including unit, system, and integration testing.
Technical Solutions: Provide technical solutions for a given business requirement.
Impediment Removal: Identify and communicate impediments to the team and actively work to remove them.
Agile Planning: Responsible for collaborating with the team on release planning, sprint planning and scoping.
Backend Analysis: Participate in analysis, design and backend development activities around Risk and Compliance projects.
Team Coordination: Coordinate with the technical lead and colleagues.
Process Improvement: Responsible for active teamwork to improve processes, communication and cultural understanding.
CI/CD Practices: Apply continuous integration/development and testing techniques.

18. Java Software Engineer Accountabilities

Search Enhancement: Develop and improve the customer search experience across research products.
Search Architecture: Design next-generation search capabilities using the latest very-large-scale and distributed cloud platforms.
Competency Building: Build up in-house competencies and reduce reliance on third parties.
Knowledge Platform: Build a knowledge platform for the next generation of applications.
Team Mentoring: Mentor junior team members and new hires.
Java Development: Participate in software development projects and implement individual application components using Java, SQL, Spring and RESTful technology.
Component Testing: Perform unit and local testing to verify the functionality of the responsible components.
Code Debugging: Support testing cycles and production by debugging code issues and implementing code fixes.
Team Collaboration: Collaborate with the Project Management team and cross-functional teams.
Domain Learning: Learn functional domain and business logic from system documents and senior team members.

19. Java Software Engineer Job Summary

Global Collaboration: Collaborate with product managers and project managers will join a team of engineers located in San Francisco (USA) and Paris (France).
Stakeholder Management: Effectively collaborate with team/project stakeholder management.
Project Execution: Effectively provide end-to-end execution of projects from the requirement phase to deployment in production.
Code Review Leadership: Participate in code review activities and set the standards for good code and lead the team for best practices in software design.
Technical Mentorship: Effectively identify technical gaps in junior team members and help them solve their technical issues.
Solution Ownership: Responsible for solution design, technology selection, solution delivery, and development escalation issues.
Product Responsibility: Responsible for one of the core products, such as Risk, Point-of-Sale, Local Payment Methods, Checkout, etc.
System Contribution: Responsible for being an integral contributor to a multi-threaded, highly performing, and complex software system.
End-to-End Ownership: In charge of the model, architecture, coding, testing, security, and release of projects.

20. Java Software Engineer Additional Details

Framework Development: Continuously work on an established open source framework written in Java 8, the framework runs over 500 applications.
Framework Maintenance: Responsible for maintaining and working on a framework rather than building applications.
Workload Management: Plan, organize, and prioritize workload as well as report issues in a prompt manner.
Agile Practice: Responsible for work in an agile way.
Framework Enhancement: Constantly working on the framework, the framework is a tool for Integration Specialists to build applications.
Feature Specification: Brainstorm with Software Architects, Product Managers and Designers to specify new features for the Nuxeo Platform.
Cross-Team Collaboration: Collaborate with several teams to build, test and deliver these features.
Support Assistance: Help the support team fix bugs and make customers happy.
Technology Exploration: Learn about new technologies and think about potential solutions to problems.
Engineer Mentoring: Mentor other engineers and review code.

21. Java Software Engineer Tasks

Marketing Tooling: Build tooling to allow marketers to spend marketing budgets across channels from a single campaign manager portal.
ROI Tracking: Work on systems to track and report on ad spend return on investment.
Ad Automation: Build systems to automate ad operations.
ML Optimization: Work on systems that will use advanced machine learning techniques to optimize spend within different channels.
Engineering Standards: Keep the bar high on sustainable engineering by following best practices, producing best-in-class code, documentation, testing and monitoring.
Content Management: Maintain the core content management functionality from the user interface to rendered content, including the template system, resources, and integration with front-end technologies.
Feature Evolution: Evolve Magnolia's features and ensure the best quality standards.
Reusable Coding: Write code that can be used and extended by users and developers alike.
Architectural Input: Contribute with own ideas about architecture and best practices.
Code Review: Participate in code reviews and application debugging and diagnosis.
Modern Methodologies: Practice modern software development methodologies such as continuous delivery, TDD and Scrum.

22. Java Software Engineer Roles and Responsibilities

Enterprise Collaboration: Work with an enterprise software company and an international team.
Customer Best Practices: Access the Software best practices from the customer side.
Customer Impact: Directly impacting the customer experience of a fast-growing customer base.
Team Culture: Build an environment of trust, collaboration, and commitment to delivering great things.
Growth Support: Support technical and personal growth, and have a dedicated career plan for all roles in the company.
Client Communication: Daily communication with the client.
Component Development: Develop the components of different levels of complexity.
Feature Implementation: Implement new product functionality.
Codebase Maintenance: Maintain an existing codebase.
Component Testing: Write tests for the developed components.
Design Participation: Perform partial components design and testing.

23. Senior Java Software Engineer Duties

Web Scalability: Work on Internet-scale public-facing responsive web applications, where performance, reliability and scalability are critical design goals.
Cross-Team Coordination: Coordinate with other application developers, frontend developers and UX designers to support the required features and modifications.
Server-Side Coding: Design and write high-performance, modular and reusable code for server-side components and maintain code quality and unit testing.
Junior Mentoring: Mentor and Coach junior colleagues in building clean code.
Technology Awareness: Stay abreast of new technologies for server-side development.
Requirement Decomposition: Decompose software requirements and turn them into more understandable and manageable pieces.
Microservice Development: Design and development of new microservices.
Requirement Implementation: Responsible for the implementation of new requirements.
Issue Troubleshooting: Responsible for investigating and troubleshooting different issues.
Service Health: Take care of services' operational health.
Infrastructure Improvement: Make services and infrastructure better.

24. Java Software Engineer General Responsibilities

Software Development: Develop new software and enhance existing software to high-quality standards.
Best Practices: Adhere to best practices that enhance user experience, usability, scalability, performance and security.
Platform Collaboration: Work with business analysts and product specialists to maintain and improve to platform.
Technical Support: Provide technical support and guidance.
Project Ownership: Take ownership and responsibility for projects and see them through to successful delivery.
Fraud/RA Projects: Involved in projects related to Fraud Management/Revenue Assurance (OSS/BSS domain).
Telecom Knowledge: Gain knowledge of Telecom Network Elements and Telecom network protocols for 2G/3G/4G.
Specification Development: Develop as per Functional Specifications.
SVN Monitoring: Ensure daily checking of SVN/CVS.
Agile Exposure: Exposure to Agile methodologies.

25. Java Software Engineer Roles and Details

Codebase Familiarization: Get to know the existing codebase with a view to modification and bug-fixing.
Feature Integration: Incorporate new functionality into the product in consultation with other team members.
Product Support: Provide second- and third-line support for product issues and queries.
Quality Coding: Produce high-quality, well-documented, maintainable code.
Team Cooperation: Cooperate with other team members in designing and implementing new features.
Java Application: Understand core computer science knowledge and strong ability to apply this knowledge using Java (Play Framework).
Backend Integration: Responsible for integrating facing elements developed by mobile developers with server-side logic.
Performance Optimization: Optimise the application for maximum speed and scalability.
Search Technologies: Apply deep experience of and enthusiasm for the latest massively parallel search technologies to power the discoverability of scientific.

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