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ATM Engineer

Synechron
Dubai, UAE
fulltime
Mid-Senior
3 weeks ago
engineeringdesignproject managementmaintenancequality controltechnical
Free

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Overview

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:

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

Technical Skills

Hands-on experience with:

Experience in

Message formats (ISO 8583 fields & DE

SQL queries for reconciliation/debugging

APIs / host integrations

Basic understanding of:

Encryption & security (HSM, PIN blocks, keys)

Chargeback lifecycle (Pre-arb, Arbitration)

Reconciliation (GL vs Switch vs Network)

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

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