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# Mainframe Developer

- **Company:** Coolpeople Cookies
- **Location:** Wien, Austria
- **Experience:** Expert
- **Salary:** €98,000
- **Contract:** Permanent contract
- **Skills:** Java (Programming Language), Algorithmic Trading, Customer Information Control System (CICS), COBOL (Programming Language), IBM DB2, Distributed Systems, Job Control Language (JCL), Mainframes, Conversion Tracking, Z/OS, Data Logging, Transaction Processing (Computing), Dynatrace
- **Published:** November 11, 2026
- **Apply:** https://www.cooljobs.eu/en/cobol/44390

## About the Role

10+ years of mainframe development

 - extensive hands-on COBOL, DB2, CICS, JCL/JES and z/OS
 - mainframe systems in financial institutions
 - securities trading, order management, clearing and settlement, fee and tax calculation, real-time trading systems
 - performance analysis and optimization, troubleshooting and production support
 - orientation in complex system environments and operational risks
 - independence, responsibility and structured problem solving
 - English C1

Nice to have

 - Java on z/OS
 - Strobe, Dynatrace, Xpediter and ChangeMan
 - integration technologies for mainframe
 - distributed or decentralized system architectures
 - German

## Description

A business-critical securities processing platform in a banking environment needs an experienced Mainframe Developer for its development, modernization and maintenance. You will design and implement new functionality in COBOL, maintain the system covering order management, transaction processing, fee and tax calculation, clearing and settlement, and help integrate the mainframe with modern distributed architectures. Required are 10+ years of mainframe development, extensive hands-on COBOL, DB2, CICS, JCL/JES and z/OS, experience in financial institutions and fluent English.

Project

 - design, development, testing and implementation of new COBOL functionality
 - order management, transaction processing, fees and taxes, trade execution and settlement
 - refactoring and optimization for performance, reliability and maintainability
 - analysis of complex technical and functional issues incl. production support
 - logging, monitoring, resilience and recovery
 - integration of the mainframe with distributed and decentralized architectures
 - technical documentation and ownership across the development lifecycle
 - on-site in Vienna, Detailed settings
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