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 solid 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.

S​YNECHRON’S DIVERSITY & INCLUSION STATEMENT Diversity & Inclusion are fundamental to our culture, and Synechron is proud to be an equal opportunity workplace and is an affirmative action employer. Our Diversity, Equity, and Inclusion (DEI) initiative ‘Same Difference’ is committed to fostering an inclusive culture – promoting equality, diversity and an environment that is respectful to all. We strongly believe that a diverse workforce helps build stronger, successful businesses as a global company.

We encourage applicants from across diverse backgrounds, race, ethnicities, religion, age, marital status, gender, sexual orientations, or disabilities to apply. We empower our global workforce by offering flexible workplace arrangements, mentoring, internal mobility, learning and development programs, and more.

All employment decisions at Synechron are based on business needs, job requirements and individual qualifications, without regard to the applicant’s gender, gender identity, sexual orientation, race, ethnicity, disabled or veteran status, or any other characteristic protected by law.

Candidate Application Notice

📌 ACI Connex Developer (Chennai)
🏢 Synechron
📍 Chennai