ZENTACT SYSTEMS PTE. LTD. is hiring for a AS400 Developer(COBOL, RPG, JCL,DB2 , Omni Script, Batch Processing , CICS) internship — a 12-month, on-site Software Engineering role based in Singapore. It is an unpaid internship. It is open to university students, typically in Year 2–4. Applicants with experience in DB2/SQL, COBOL, AS400 Administration, Root Cause Analysis, and RPG are a strong fit.
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About this role
Responsibilities • Lead development and enhancement initiatives for applications running on IBM i / AS400 platforms • Analyze business requirements and translate them into detailed technical designs and specifications • Oversee coding, unit testing, and deployment activities while ensuring adherence to quality standards • Conduct root cause analysis for production issues and implement long-term fixes to prevent recurrence • Review code, enforce development standards, and ensure best practices are followed across the team • Coordinate with stakeholders, including business users, architects, and onsite teams, to ensure alignment • Manage task allocation, track progress, and ensure timely delivery of project milestones • Support production systems by monitoring performance, resolving incidents, and ensuring system availability • Prepare and maintain technical documentation, test plans, and status reports • Participate in design discussions and provide technical recommendations for system improvements • Mentor junior team members and facilitate knowledge sharing within the team • Drive continuous service improvement initiatives and contribute to process optimization Requirements • Strong experience in IBM i / AS400 application development • Proficiency in COBOL, RPG (RPGLE). • Sound experience in financial industry with good experience in payments • Hands-on experience with DB2 and embedded SQL • Familiarity with development and change management tools • Solid understanding of system performance, job scheduling, and operational support on IBM i platforms • Experience in Omni Script, Control-M , Batch Processing • Experience in application maintenance, enhancements, and production support environments • Ability to work in distributed (onsite-offshore) delivery models • Strong analytical, problem-solving, and debugging capabilities
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