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
  

• 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
  

• 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