Hire Resolve’s client is looking for a Mainframe Assembler Developer to join their team in Cape Town, WC. This role involves collaborating within a development team to troubleshoot, enhance, and maintain complex mainframe applications, contributing to continuous improvements and ensuring system stability.

Responsibilities: 

• Develop, modify, and maintain Assembler-based mainframe applications.
• Code, test, debug, and document Assembler programs according to specifications and coding standards.
• Work with business analysts and stakeholders to understand application requirements, providing technical solutions and recommendations.
• Conduct performance tuning, troubleshooting, and optimization to ensure high efficiency and reliability.
• Create and maintain technical documentation, including design specifications, testing plans, and release notes.
• Participate in all phases of the Software Development Life Cycle (SDLC) from analysis and design through implementation and post-deployment support.
• Ensure integration compatibility between mainframe applications and other business systems.
• Maintain compliance with security and regulatory standards, especially regarding data handling and access control.

Requirements 

• Assembler Language: Strong expertise in writing, debugging, and maintaining Assembler programs for mainframe systems.
• Mainframe Technologies: Proficiency with IBM z/OS, JCL (Job Control Language), TSO/ISPF, VSAM, CICS, DB2, and MQ Series.
• Performance Tuning: Proven experience optimizing Assembler programs and addressing performance-related issues in mainframe applications.
• Software Development Lifecycle (SDLC): Experience with both Waterfall and Agile methodologies for mainframe systems development.
• Batch & Online Processing: Hands-on experience with both batch job and online transaction processing in a mainframe environment.

Desired Skills:

• COBOL and PL/I: Familiarity with additional mainframe languages such as COBOL and PL/I.
• Database Management: Knowledge of DB2 and IMS DB/DC mainframe database environments.
• Tools & Utilities: Experience with mainframe development tools, including Control-M, File-AID, Expeditor, and CA Endevor.
• Sector Experience: Knowledge of financial, insurance, or government systems can be beneficial.
• Project Support Tools: Familiarity with task management and tracking tools like Jira.

If you would like a career change, you may send your CV to Gaby Turner at or Carmen Schafer at Alternatively you may send your CV to