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 gaby.turnerhireresolve.us or Carmen Schafer at carmen.schaferhireresolve.us Alternatively you may send your CV to itcareershireresolve.za.com