Mainframe Developer (card Link)

Unison Consulting Pte Ltd
Full-time
On-site

Job Summary

We are seeking an experienced Mainframe Developer with strong expertise in Cardlink systems to design, develop, enhance, and maintain payment processing applications. The ideal candidate will have a solid understanding of mainframe technologies and hands-on experience working with Cardlink for credit/debit card transaction processing.

Key Responsibilities

  • Develop, enhance, and maintain mainframe applications using COBOL, JCL, CICS, and DB2.
  • Work on Cardlink modules for card issuance, authorization, settlement, chargeback, and reconciliation processes.
  • Analyze business requirements and translate them into technical specifications.
  • Perform system analysis, coding, unit testing, integration testing, and support for production systems.
  • Troubleshoot and resolve application issues within SLA timelines.
  • Participate in code reviews and ensure compliance with coding standards and best practices.
  • Collaborate with business analysts, QA teams, and other stakeholders for smooth project delivery.
  • Create and maintain technical documentation.
  • Provide production support during business and non-business hours when needed.

Required Skills & Experience

  • 5+ years of experience in Mainframe development.
  • Strong hands-on skills in COBOL, JCL, CICS, DB2, VSAM.
  • Proven working experience with Cardlink application modules and payment domain processes.
  • Knowledge of ISO 8583 messaging standards and transaction switching is a plus.
  • Experience in debugging, performance tuning, and production support.
  • Familiarity with SDLC methodologies (Agile/Waterfall).
  • Good communication and problem-solving skills.

Preferred Skills

  • Exposure to other payment systems (Base24, VisionPLUS, FIS, etc.).
  • Knowledge of batch and online transaction processing.
  • Understanding of PCI DSS and other payment security standards.