Mainframe Developer

Location: New York

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Job Description Mainframe with exp in Java, AWS, Github, Claude code

Key Responsibilities:

Perform detailed system analysis, requirement gathering, and technical design for Mainframe applications.

Develop, enhance, maintain, and support applications using COBOL, JCL, DB2, and VSAM.Analyze existing Mainframe batch applications, job streams, business processes, and application dependencies.

Perform impact analysis to assess the effects of application changes, modernization efforts, and decommissioning activities on upstream and downstream systems.

Analyze interfaces, data flows, batch schedules, and business rules to identify dependencies, risks, and modernization opportunities.

Support application rationalization and decommissioning of legacy Mainframe applications.

Participate in Mainframe modernization initiatives involving the migration and transformation of COBOL-DB2 applications into Java-based applications on AWS.Utilize Claude-assisted code transformation tools to support code analysis, conversion, refactoring, and documentation activities.

Execute unit testing, integration testing, and support User Acceptance Testing (UAT).Validate functional equivalence between legacy Mainframe applications and modernized Java applications.

Participate in production deployments and perform Post Verification Testing (PVT).Provide periodic testing, production support, troubleshooting, and research support.

Collaborate with business stakeholders, architects, and cross-functional teams in an Agile environment.

Maintain project documentation and work management activities using  flexible and willing to work across different IST shifts based on project requirements.

Technical

Skills:

Mainframe Technologies:

COBOLJCLDB2

VSAMCloud & Modernization:

AWS Cloud Mainframe ModernizationCOBOL-to-Java Migration/Re-engineering

Java Development Claude-assisted Code Transformation Legacy Application Assessment and Transformation Mainframe Batch Analysis Impact Analysis and Dependency Mapping Application Rationalization and Legacy System DecommissioningAWS-based Application Migration and Deployment Development Methodologies & Tools:

Agile MethodologyJIRA

Core Competencies:

Mainframe Application Development and Support Batch Processing and File Handling System Analysis and Technical Design Application Impact Assessment Modernization and Migration Planning Unit Testing and Integration Testing Production Support and Troubleshooting The base compensation range for this role in the posted location is: 85,000 - 96,655.Capgemini provides compensation range information in accordance with applicable national, state, provincial, and local pay transparency laws.

The base compensation range listed for this position reflects the minimum and maximum target compensation Capgemini, in good faith, believes it may pay for the role at the time of this posting. This range may be subject to change as permitted by law.

The actual compensation offered to any candidate may fall outside of the posted range and will be determined based on multiple factors legally permitted in the applicable jurisdiction.

These may include, but are not limited to:
Geographic location, Education and qualifications, Certifications and licenses, Relevant experience and skills, Seniority and performance, Market and business consideration, Internal pay equity.

It is not typical for…