Senior AS400 Developer (COBOL)

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Job Title: Senior AS400 Developer (COBOL)

Domain: Core Banking

Sub-Domain: ATM

Experience Level: Senior (L3: 6-9 years)

Location: Kuala Lumpur

Job Summary:

We are seeking a Senior ATM Core Banking Developer to design, develop, and maintain ATM host applications within a core banking environment. The role focuses on supporting customer self-service ATM systems running on AS400/DB2 platforms. The ideal candidate will have strong expertise in COBOL 400 and hands-on experience in ATM transaction processing systems, ensuring high availability, security, and reliability of banking services.

Key Responsibilities:

Design, develop, and maintain ATM Host applications on AS400 platform

Develop and enhance COBOL 400 programs for ATM transaction processing

Support end-to-end ATM functionalities including withdrawals, deposits, balance inquiries, and fund transfers

Work with DB2 databases for data processing and integration

Analyze, troubleshoot, and resolve production issues in ATM systems

Collaborate with business and technical teams to deliver enhancements and fixes

Participate in system testing, deployment, and post-production support

Ensure compliance with banking security standards and transaction integrity

Maintain technical documentation and support SDLC processes

Required Skills:

6-9 years of experience in core banking or ATM-related development

Strong hands-on experience in COBOL 400 (mandatory)

Experience working on AS400 (IBM iSeries) environment

Good knowledge of DB2 database on AS400

Strong understanding of ATM (Automated Teller Machine) systems and customer self-service banking

Experience in production support and incident resolution

Strong debugging, analytical, and problem-solving skills

Nice-to-Have Skills:

Experience with DevOps practices in AS400 environments

Knowledge of ALDON or similar deployment automation tools

Understanding of encryption and security protocols in banking systems

Exposure to core banking transaction processing systems

Familiarity with change management and release processes

Experience working in Agile or hybrid delivery environments