L3 Support Mainframe Developer

Location: Kuala Lumpur, Malaysia

Work Mode: Onsite

Employment type: Contract

Experience Level: 3–5 years

Oxydata Software Sdn Bhd established since 2012, helping regional enterprises drive digital transformation through Agentic AI Services, AI Automation & Integration, Data Engineering, AI Training, and IT Managed Services. We are a lean, high-impact team where engineers work directly on cutting-edge AI products serving enterprise clients across Malaysia and the region.

We are seeking an experienced L3 Support Mainframe Developer to provide critical application support and development for Cardlink applications within the banking sector.

Responsibilities

• Deliver L3 production support and technical assistance for Mainframe/Cardlink applications.
• Develop, maintain, enhance, and troubleshoot applications using COBOL and CICS.
• Analyse production incidents, defects, and application issues, performing root-cause analysis and implementing solutions.
• Develop and maintain JCL for batch processing and application execution.
• Utilise Easytrieve for reporting, data extraction, and mainframe processing requirements.
• Work with VSAM and sequential datasets for application data processing and troubleshooting.
• Support application testing, deployment, release, and delivery activities.
• Participate in SDLC activities including requirements analysis, development, testing, implementation, and post-production support.
• Collaborate with QA, application support, business, infrastructure, and other technical teams to resolve issues and deliver enhancements.
• Prepare and maintain technical documentation, support procedures, and application specifications.
• Ensure production changes are implemented safely and in accordance with established controls and procedures.

Requirements

Must-have:

• Bachelor's degree in any related discipline.
• Minimum 3 years of experience in Mainframe application development and support.
• At least 4 years of hands-on experience developing applications using COBOL and CICS.
• Strong experience with Mainframe z/OS environments.
• Experience working with VSAM and sequential datasets.
• Experience with Cardlink development and delivery.
• Experience in the banking or financial services sector.
• Good understanding of SDLC processes and software delivery practices.

Nice-to-have:

• Experience with Mainframe automation tools such as IBM Tivoli or CA OPS/MVS.
• Familiarity with mainframe security solutions (e.g. RACF, ACF2, or Top Secret).
• Experience supporting card payment systems or ISO 8583 messaging standards.

Why Join Us

• Be part of a dynamic team supporting mission-critical banking applications and gain exposure to leading mainframe technologies.
• Opportunity to work in a collaborative environment, contribute to impactful projects, and further develop your expertise in the financial services sector.

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