Software Engineer – ACI ; Classic

Software Engineer – ACI Base
24 (Classic) Atlanta, GA (Onsite/Hybrid)

Seeking an experienced Software Engineer with strong hands‑on expertise in ACI Base
24 Classic for ATM/POS payment processing. This role includes configuring Base
24 components, supporting daily operations, enhancing interfaces, and ensuring stable transaction processing for high‑volume financial environments.

• Configure, customize, and maintain ACI Base
  24 Classic components for ATM/POS transaction processing.
• Work with Base
  24 interfaces including payments switches, host systems, and card networks.
• Troubleshoot production issues related to transaction routing, authorization, BIN routing, and terminal management.
• Monitor system performance and support 24x7 operational environments.
• Develop enhancements and scripting modifications where required for Base
  24 applications.
• Collaborate with network, payment operations, and infrastructure teams to support stable transaction flow.

• 5–10+ years of experience working with ACI Base
  24 Classic in a banking or payments environment.
• Strong knowledge of card authorization, terminal management, PIN translation, and payment switching.
• Hands‑on experience with Base
  24 configuration, parameter updates, and deployment.
• Strong debugging and problem‑solving capability for live transaction issues.
• Experience with Tandem/HP Non Stop, TAL/TACL, COBOL, C, or similar environments.

• Experience integrating Base
  24 with networks such as VISA, Mastercard, STAR, NYCE, Interlink, etc.
• Knowledge of ISO 8583 message specifications.
• Familiarity with ATM/POS compliance standards and transaction security.
• Strong communication and documentation skills.