Java Full Stack Developer

Java Full Stack DeveloperThis position is listed on behalf of a partner company, who manages all applications and next steps. Our partner is looking for a Java Full Stack Developer based in United States.This role offers the opportunity to modernize complex legacy systems by translating established mainframe technologies into scalable, modern Java solutions. You'll play a key role in pre-production development, supporting software modernization within a microservices architecture. The position combines deep Java development with full-stack engineering, system integration, database modernization, and cloud-native capabilities. You'll work with legacy technologies including COBOL, ASM, JCL, and Copybooks while helping transition functionality to contemporary platforms. The role also involves leveraging AI/ML-enabled development approaches, CI/CD practices, and modern API and application architectures. You'll collaborate across development, testing, integration, and modernization activities in a highly complex technology environment. This is a remote full-time opportunity with occasional travel to Columbus, Ohio, and is contingent upon contract award.Accountabilities: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.Travel to Columbus, Ohio for on-site meetings approximately once per month, for up to three days per visit.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.