Sr. COBOL / Java / Spring Batch Developer

This is a remote position.Location: RemoteSummary: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 DoAs 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

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