18.09.2025 aktualisiert
100 % verfügbar
Experienced Mainframe Developer with 9+ years in IBM Mainframe Environment
Duisburg, Deutschland
Weltweit
Bachelor of Engineering: Instrumentation TechnologySkills
Unit TestingBankingBusiness SoftwareCICS Transaction ServerCOBOLProgrammoptimierungKommerzielle HypothekDatenbankenDatenintegritätIBM DB2Software-Design-DokumenteDistributed ComputingFinanzsystemeFunktionelles DesignIbm Jcl
IBM Mainframe Development
Expertise in developing and maintaining applications in IBM Mainframe environment using COBOL, DB2, JCL, CICS, Assembler and VSAM for core business applications.
Financial Systems Development
Experience in developing banking and financial applications including mortgage processing systems, clearing systems, and payment processing solutions.
End-to-End Testing & Quality Assurance
Comprehensive testing expertise including unit testing, system integration testing, and end-to-end testing using tools like TESTTMC to validate transaction flows and data integrity.
Technical Documentation
Creation of high-quality technical documentation including Functional Specification Documents, Application Design Documents, and Component Design Documents.
System Optimization
Identification of performance bottlenecks and implementation of improvements in program logic, database access patterns, and job scheduling.
Cross-System Integration
Analysis of interactions between distributed systems and ensuring consistent functionality across multiple environments and subsystems.
Production Implementation
Coordination of production deployment activities including job scheduling, resource allocation, and post-deployment monitoring to ensure minimal downtime.
Expertise in developing and maintaining applications in IBM Mainframe environment using COBOL, DB2, JCL, CICS, Assembler and VSAM for core business applications.
Financial Systems Development
Experience in developing banking and financial applications including mortgage processing systems, clearing systems, and payment processing solutions.
End-to-End Testing & Quality Assurance
Comprehensive testing expertise including unit testing, system integration testing, and end-to-end testing using tools like TESTTMC to validate transaction flows and data integrity.
Technical Documentation
Creation of high-quality technical documentation including Functional Specification Documents, Application Design Documents, and Component Design Documents.
System Optimization
Identification of performance bottlenecks and implementation of improvements in program logic, database access patterns, and job scheduling.
Cross-System Integration
Analysis of interactions between distributed systems and ensuring consistent functionality across multiple environments and subsystems.
Production Implementation
Coordination of production deployment activities including job scheduling, resource allocation, and post-deployment monitoring to ensure minimal downtime.
Erfahrung
Berufserfahrung5 - 10 Jahre
Freelancer seit2025
Sprachen
DeutschgutEnglischMuttersprache
Projekthistorie
Developed and supported backend services for mortgage processing systems within C14 mainframe architecture using RDz and IMSDC. Conducted comprehensive end-to-end testing, worked on cross-LPAR integrations, and acted as liaison between technical teams and business analysts.
Led technical development for Bank of America, focusing on clearing systems that facilitate settlement between house and street trades. Conducted in-depth business requirements analysis, authored technical documentation, developed complex batch and online applications using COBOL, JCL, DB2, and managed end-to-end code migration.
Responsible for delivering CTAC for Mariott and CRS for American International Group (AIG). Developed and maintained programs using COBOL, JCL, Assembler and DB2, provided postproduction support, designed test cases, and coordinated production deployments.