Sr. COBOL / Java / Spring Batch Developer

This is a remote position. Location: Remote Summary: BizFirst is assisting our client with hiring a Senior COBOL / Java / Spring Batch Developer to support a large-scale federal modernization initiative. Our client is a specialized government contractor supporting defense financial systems modernization, focused on transforming legacy mainframe applications into modern, scalable, and maintainable Java-based architectures. What You Will Do As a Senior COBOL / Java / Spring Batch Developer, you will support the analysis, conversion, and modernization of complex legacy mainframe systems into a modern Java environment. You will work closely with technical and functional stakeholders to translate business logic from COBOL into Java/Spring Batch, ensuring functional equivalence, improved performance, and alignment with modern development standards. Your work will directly contribute to a multi-phase effort to modernize critical financial systems and reduce technical debt. Responsibilities • Analyze and interpret complex COBOL codebases and translate business logic into Java applications • Design, develop, and implement batch-processing solutions using Java and Spring Batch • Support automated code conversion efforts and validate functional equivalence of converted systems • Refactor legacy logic into modular, maintainable, and scalable Java-based solutions • Troubleshoot production issues and perform root cause analysis across legacy and modern systems • Collaborate with system analysts, data architects, testers, and subject-matter experts • Ensure adherence to coding standards, security requirements, and documentation practices • Support integration of modernized code into enterprise systems and future microservices architecture Required Qualifications • Bachelor’s or Master’s Degree in Computer Science, Information Technology, or related field • Minimum of 10 years of experience in software development with strong expertise in COBOL and Java • Hands-on experience with Spring Batch for enterprise batch processing • Experience working with z/OS and JCL in mainframe environments • Proven ability to analyze, maintain, and modernize legacy mainframe applications • Strong troubleshooting and debugging experience across complex systems • Strong written and verbal communication skills • U.S. Citizenship required, Active DoD Secret clearance required Preferred Qualifications • Experience supporting large-scale legacy system modernization efforts • Familiarity with mainframe technologies such as DB2, VSAM, IDMS, or similar systems • Experience with microservices architecture and modern application design patterns • Experience working within federal or DoD environments Originally posted on Himalayas