ACI Connex Developer

Job Title: ACI Connex Developer

Experience: 3 to 8 Years

Location: Pune / Bangalore / Chennai

Job Summary

We are seeking an experienced ACI Connex Developer with strong expertise in payment switching, ATM/POS transaction processing, ISO 8583 messaging, and acquiring/issuing systems. The ideal candidate should have hands-on experience in Connex development, switch interfaces, payment network integrations, and transaction processing solutions within the Cards & Payments domain.

Key Responsibilities

• Develop, customize, and support ACI Connex payment switch applications.
• Design and implement transaction processing solutions for ATM, POS, and card payment systems.
• Develop and maintain Connex interfaces, routing rules, and transaction flows.
• Work on issuer and acquirer transaction processing requirements.
• Analyze and troubleshoot payment-switch-related production issues.
• Support Visa, Mastercard, NPCI, and other payment network integrations.
• Perform unit testing, SIT, UAT, certification, and production deployments.
• Collaborate with business, operations, and client teams to deliver payment solutions.
• Ensure high availability and performance of payment-switching systems.

Mandatory Skills

• Hands-on experience in ACI Connex Development
• Connex Script development/customization
• ISO 8583 Message Processing
• Payment Switching
• ATM/POS Transaction Processing
• Acquiring & Issuing Systems
• Payment Network Integrations (Visa, Mastercard, NPCI)
• Switch Interface Development
• Transaction Routing & Authorization

Technical Skills

• Java
• Python
• SQL
• Node.js
• XML
• Connex Scripts

Preferred Skills

• Experience with ACI payment products.
• Knowledge of ATM/POS terminal integrations.
• EMV transaction processing.
• Production support and incident management.
• Banking and Cards & Payments domain experience.
• Exposure to switch certification projects.