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# Mainframe Developer - Securities Processing Platform

- **Company:** softwareXperts GmbH
- **Location:** Wien, Austria
- **Experience:** Expert
- **Contract:** Permanent contract
- **Skills:** Java (Programming Language), Algorithmic Trading, Application Performance Management, Customer Information Control System (CICS), COBOL (Programming Language), Databases, IBM DB2, Disaster Recovery, Monitoring of Systems, Job Control Language (JCL), Mainframes, Microsoft SQL Server, Software Engineering, Z/OS, Data Logging, Transaction Processing (Computing), System Availability, Code Restructuring, Dynatrace
- **Published:** November 6, 2026
- **Apply:** https://www.sw-xperts.com/jobs-projekte/10356?no_cache=1

## About the Role

* At least 10 years of professional experience in mainframe development and mainframe computing.
 * Extensive hands-on experience with:
 + COBOL
 + DB2
 + CICS
 + JCL / JES
 + z/OS
 * Proven experience working with mainframe systems in the banking or financial services industry.
 * Strong understanding of securities trading and securities-processing business processes, particularly:
 + Order and transaction management
 + Trade execution
 + Clearing and settlement
 + Fee and tax calculation
 + Real-time trading systems
 * Proven experience in application performance analysis, optimization, troubleshooting, and production support.
 * Experience working with complex system landscapes and analyzing technical dependencies.
 * Knowledge of integrating mainframe applications with modern distributed and decentralized architectures.
 * Ability to identify operational risks, assess priorities, and develop effective solutions.

Nice to Have

 * Experience with Java on z/OS.
 * Knowledge of performance analysis and monitoring tools such as Strobe and Dynatrace.
 * Experience with Xpediter and ChangeMan.
 * Familiarity with mainframe integration technologies.
 * Experience working with modern distributed and decentralized system architectures.
 * Knowledge of approaches to improving the stability, availability, and performance of business-critical applications.

Your Personal Skills

You are a proactive and reliable professional who combines strong technical expertise with a structured and solution-oriented mindset.

You also bring:

 * Strong analytical and problem-solving skills.
 * A high degree of ownership, accountability, and independence.
 * A proactive approach and the ability to take responsibility for complex topics.
 * Excellent teamwork and collaboration skills.
 * Strong communication skills and the ability to work effectively with technical and business stakeholders.
 * A structured approach to prioritization and risk management.
 * A willingness to share knowledge and support the continuous development of the team.

Languages

 * English: Fluent, both written and spoken (mandatory).
 * German: Good knowledge is an advantage., * 20 years of IT-recruitment experience
 * access to a huge talentpool
 * individual consulting.

## Description

We are looking for an experienced Senior Mainframe Developer (m/f/d) to support a leading financial institution in Vienna in the development, maintenance, modernization, and continuous improvement of its business-critical securities-processing platform.
Vienna Parttime 1x / week on site 01.12.2026

Must haves

 * Cobol/ DB2
 * CICS und z/OS
 * JCL / JES

Nice to have

 * Java auf z/OS.
 * Dynatrace und Strobe
 * Xpediter

Wanted Expertise

 * Developer - Developer (other)
 * Finance - Developer
 * Developer - Databases- SQL-Server, DB2, ...

Your Tasks

 * Design, develop, test, and implement COBOL-based applications, features, and enhancements.
 * Maintain, support, and further develop the existing mainframe securities-processing platform.
 * Support and optimize critical business processes, including:
 + Order management and transaction processing
 + Trade execution and securities trading
 + Fee and tax calculation
 + Clearing and settlement
 * Refactor and optimize existing application modules to improve performance, maintainability, and reliability.
 * Analyze, troubleshoot, and resolve complex technical and functional issues.
 * Improve application logging, monitoring, and operational resilience.
 * Enhance system availability, stability, and disaster recovery capabilities.
 * Integrate the mainframe environment with modern distributed and decentralized architectures.
 * Analyze complex system landscapes, interfaces, dependencies, and technical interactions.
 * Prepare and maintain technical documentation.
 * Take end-to-end ownership of assigned topics throughout the entire software development lifecycle.
 * Ensure compliance with internal technical standards, security requirements, and development guidelines.