Senior Mainframe Developer (Onsite)
Serigor Inc
Job Title: Senior Mainframe Developer (Onsite)
Location: Columbia, MD
Job Type: Full-Time Job Description:
Location: Columbia, MD
Job Type: Full-Time Job Description:
- We are seeking a highly experienced Senior Mainframe Developer to support large-scale enterprise modernization initiatives focused on transforming legacy Mainframe applications into modern, cloud-ready .NET platforms.
- This role requires deep expertise in Mainframe technologies, enterprise modernization, and technical leadership. The ideal candidate will lead Mainframe analysis and modernization activities, collaborate with cross-functional engineering teams, and serve as the primary Mainframe technical lead throughout the modernization lifecycle.
- Candidates should have strong experience analyzing complex legacy applications, documenting business rules and system dependencies, supporting AI-assisted modernization efforts, and working closely with client stakeholders and modernization teams.
- Experience with automated code conversion tools, modernization factories, and enterprise transformation platforms is highly preferred.
- Analyze, maintain, support, and modernize large-scale Mainframe applications and legacy systems
- Work extensively with:
- COBOL
- JCL and PROCs
- CICS
- VSAM
- DB2
- IMS
- BMS Maps
- Batch processing environments
- Lead Mainframe modernization discussions, workshops, and technical assessments with client stakeholders
- Serve as the primary Mainframe technical lead for modernization activities, dependencies, and integration efforts
- Analyze legacy business workflows, system integrations, data structures, and application dependencies
- Recommend modernization, migration, remediation, and transformation strategies
- Support AI-assisted code conversion, remediation, and modernization workflows
- Document business rules, technical processes, data mappings, reconciliation logic, and functional behavior
- Collaborate closely with .NET developers, architects, QA teams, DevOps engineers, and business analysts
- Lead source code inventory analysis, dependency mapping, and system assessment activities
- Support functional equivalence validation, reconciliation, testing, and stabilization efforts
- Assist with enterprise data migration and synchronization between legacy and modernized systems
- Troubleshoot production issues, optimize batch workloads, and support application enhancements
- Participate in modernization factory workflows including automated analysis, remediation, and transformation activities
- Prepare technical documentation, modernization artifacts, operational runbooks, and system analysis reports
- Provide mentorship and technical leadership to modernization teams
- 15+ years of hands-on experience with enterprise Mainframe applications
- Strong expertise with:
- COBOL
- JCL and PROCs
- CICS
- VSAM
- DB2
- IMS
- BMS Maps
- Batch processing systems
- Strong understanding of:
- Enterprise Mainframe architectures
- Transaction processing systems
- Batch processing frameworks
- Legacy application workflows
- Enterprise integration patterns
- Extensive experience supporting large-scale legacy modernization initiatives
- Experience working with automated code analysis tools, transformation pipelines, and modernization accelerators
- Strong client-facing communication and stakeholder management skills
- Experience serving as a technical lead on modernization programs
- Strong understanding of enterprise business processes, data flows, and system dependencies
- Exposure to:
- Distributed systems
- APIs and middleware
- Hybrid integration architectures
- Cloud modernization initiatives
- Familiarity with AWS and/or Azure environments
- Strong troubleshooting, analytical, and problem-solving skills
- Ability to lead technical modernization activities independently in fast-paced enterprise environments
- Excellent written and verbal communication skills
- Exposure to:
- C#
- .NET / .NET Core
- Java
- Modern distributed application environments
- Hands-on experience with:
- Mainframe-to-.NET transformation
- AI-assisted code conversion
- Automated remediation workflows
- Functional equivalence validation
- Modernization factory delivery models
- Experience working in Agile/Scrum delivery environments
- Experience supporting government, financial, healthcare, tax, or other large enterprise modernization programs
- Experience working with modernization factories, automated conversion tools, and migration accelerators
- Familiarity with cloud-native modernization and hybrid cloud integration strategies
- Mainframe
- COBOL
- JCL and PROCs
- CICS
- VSAM
- IMS
- DB2
- BMS Maps
- Batch Processing Systems
- DB2
- Microsoft SQL Server
- Mainframe-to-.NET Migration
- AI-Assisted Code Conversion
- Automated Code Remediation
- Functional Equivalence Testing
- Enterprise Transformation Platforms
- APIs and Middleware
- System Integration
- AWS
- Azure
- Hybrid Cloud Architectures
- Production Support
- Technical Analysis
- Migration Strategy
- Source Code Analysis
- Dependency Mapping
- System Reconciliation
- Technical Leadership
Vacancy posted 5 days ago
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