Senior Mainframe Developer – Securities Processing Platform (m/w/d)

softwareXperts GmbH; Wien; On-site; EUR 90,000 - 130,000; Full time

Job summary

softwareXperts GmbH in Vienna seeks a Senior Mainframe Developer (m/f/d) to support a leading financial institution. You will design, develop, and modernize the securities-processing platform, focusing on COBOL-based applications, mainframe reliability, and integration with modern distributed systems.

The role requires 10+ years in mainframe development, deep COBOL/DB2/CICS/JCL/JES expertise, and banking domain knowledge.

Qualifications

• At least 10 years of professional experience in mainframe development and mainframe computing.
• Extensive hands-on COBOL, DB2, CICS, JCL/JES, z/OS experience.
• Proven experience in banking/financial services environments.

Responsibilities

• Design, develop, test, and implement COBOL-based applications, features, and enhancements.
• Maintain, support, and evolve the mainframe securities-processing platform.
• Support and optimize core processes: order management, trade execution, settlement, and fee/tax calculations.
• Refactor and optimize modules for performance and reliability.
• Analyze, troubleshoot, and resolve complex issues; improve logging and monitoring.
• Ensure system availability, disaster recovery readiness, and security compliance.
• Integrate mainframe with distributed architectures and prepare technical documentation.

Skills

COBOL

DB2

CICS

JCL/JES

z/OS

Java on z/OS

Banking domain knowledge

Tools

Xpediter

Job description

ID: 10356

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.

Must haves

• Cobol/ DB2
• JCL / JES

Nice to have

• Xpediter

Wanted Expertise

• Developer - Developer (other)
• Finance - Developer

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.

Requirements

• 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.