Job Description

Job Purpose

We are looking for a skilled Postilion Implementation Specialist with strong experience in electronic payments, card transaction processing, and switch systems. The candidate will be responsible for implementing, configuring, and supporting ACI Postilion solutions for ATM, POS, and online transactions.

Job Accountabilities/Essential Functions Responsibilities

• Lead and support end-to-end implementation of Postilion switch (ATM/POS acquiring & issuing)
• Gather and document business requirements (BRD, SRS) for payment systems
• Configure Postilion components:
• Transaction routing
• Message parsing & formatting (ISO 8583)
• Device handlers (ATM/POS)
• Integrate Postilion with:
• Core Banking Systems
• Card Management Systems (CMS)
• External networks like Visa Inc. and Mastercard
• Work on:
• Key exchange & encryption (DUKPT, PIN translation)
• Transaction life cycle (Authorization → Clearing → Settlement)
• Handle scheme certifications (Visa/Mastercard testing & compliance)
• Support chargeback, reconciliation, and dispute flows
• Perform SIT/UAT testing and production deployment support
• Troubleshoot transaction failures, reversals, and reconciliation breaks

Experience/ Skills Required

Technical Skills

• Hands-on experience with:
• ACI Postilion (Postilion Realtime / Office)
• Experience in:
• Message formats (ISO 8583 fields & DEs)
• SQL queries for reconciliation/debugging
• APIs / host integrations
• Basic understanding of:
• Encryption & security (HSM, PIN blocks, keys)
• Domain & Process Skills
• Experience in:
• Chargeback lifecycle (Pre-arb, Arbitration)
• Reconciliation (GL vs Switch vs Network)
• Scheme rules (Visa / Mastercard)

Payments Domain

• Core Payments Knowledge
• Strong understanding of:
• ATM & POS transaction flows
• Acquiring vs Issuing
• ISO 8583 message structure
• EMV transactions & fallback scenarios
• Knowledge of:
• Interchange, MDR, and fee calculations
• Cross-border transactions & currency handling

Good to Have

• Experience with:
• Fraud systems integration
• Tokenization / digital payments

Soft Skills

• Strong stakeholder communication (Bank, Vendor, Scheme)
• Problem-solving in high-volume transaction environments
• Ability to handle production issues under SLA pressure

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