Java Full Stack Developer

This position is listed on behalf of a partner company for a Java Full Stack Developer based in the United States. The role focuses on modernizing complex legacy systems by translating established mainframe technologies into scalable, modern Java solutions within a microservices architecture.

About the Role

You’ll play a key role in pre-production development, supporting software modernization by combining deep Java development with full-stack engineering, system integration, database modernization, and cloud-native capabilities. The position involves working with legacy technologies such as COBOL, ASM, JCL, and Copybooks while transitioning functionality to contemporary platforms. You’ll also leverage AI/ML-enabled development approaches, CI/CD practices, and modern API and application architectures in a highly complex technology environment.

This is a remote full-time opportunity with occasional travel to Columbus, Ohio (approximately once per month for up to three days per visit). The role is contingent upon contract award.

Responsibilities

• Translate and refactor legacy code into modern Java applications within a defined microservices architecture.
• Analyze and update the existing legacy code base, including COBOL, ASM, JCL, and Copybooks, to identify functional and non-functional code across the baseline.
• Apply AI/ML tools and development processes where appropriate to accelerate and improve legacy code translation.
• Optimize translated applications by applying microservices or other modular architectural approaches.
• Design and develop new software products and significant enhancements to existing applications.
• Address complex systems integration, compatibility, interoperability, and multi-platform challenges.
• Implement modernized code within pre-production environments to support development, testing, and integration activities.
• Support integration between modern UI/UX front ends, service layers, and relational databases.
• Develop and support both batch and real-time processing capabilities, including ingestion of flat files and modern file formats.
• Build and contribute to CI/CD pipelines, workflows, and development processes.
• Support Zero Trust, ICAM integration, and cloud-native capabilities.
• Apply Agile software development practices throughout design, development, testing, and deployment.
• Perform feasibility analysis for potential future initiatives and provide technical input to management.
• Contribute to legacy modernization, data migration, system analysis, and technical solution decomposition activities.

Requirements

• At least 5 years of relevant professional experience in software development or a closely related technical field.
• Deep, demonstrated expertise in Java, which is the primary technical qualification for the role.
• Demonstrated full-stack development experience across application design, development, testing, integration, and deployment.
• Experience with technologies such as Java, HTML, .NET, AngularJS, JavaScript, SOAP, REST APIs, and web-based APIs.
• Experience working with both hierarchical and relational database structures.
• Strong understanding of microservices architecture, modern application design, and software integration.
• Significant experience with Agile software development methodologies.
• Demonstrated experience working with highly complex IT environments, including legacy system upgrades, modernization, transition, data migration, or system analysis and design.
• Knowledge of COBOL is a significant advantage, particularly experience translating or modernizing mainframe applications.
• Prior experience converting mainframe systems to modern languages and architectures is highly desirable.
• AI/ML development or implementation experience is preferred.
• Experience with modern database design and software modernization within federal government or Department of Defense environments is highly valued.
• Ability to perform functional and technical solution decomposition to support effective analysis, architecture, and implementation.
• Oracle Certified Professional, Java SE certification, or equivalent certification is required.
• A bachelor's degree in Computer Science, Information Systems, Engineering, IT, or a related discipline is preferred; equivalent relevant experience may be considered.
• Must possess an IT-II Non-Critical Sensitive security clearance or Tier 3 (T3) clearance at the time of proposal submission.
• Strong analytical, problem-solving, communication, and collaboration skills.

Benefits

• Competitive full-time benefits package.
• Medical, dental, and vision insurance.
• Life and disability insurance coverage.
• Retirement savings plan with company matching.
• Paid time off.
• Voluntary supplemental benefits.
• Employee Assistance Program.
• Educational assistance and tuition reimbursement.
• Remote work environment within the United States.
• Opportunity to contribute to complex technology modernization initiatives supporting government and mission-critical environments.
• Opportunity to work with modern Java, microservices, cloud-native technologies, and AI/ML-enabled development approaches.