Colate is looking for a FIS Inter System Transaction(IST) Switch Expert. The FIS IST Switch Expert will be responsible for the design, implementation, optimization, and support of the FIS International Switching (IST) platform, ensuring high availability, regulatory compliance, and seamless transaction processing across ATM, POS, and digital payment channels.
Key Responsibilities
Define target-state architecture for FIS IST across ATM, POS, and digital payment channels
Establish high availability, active-active, and disaster recovery designs
Lead architecture blueprints covering transaction routing, authorization, clearing, and settlement flows
Drive alignment with enterprise architecture standards (cloud, API, microservices)
Architect and lead migration from legacy switches (e.g., Connex, BASE24, Postilion) to IST
Define coexistence strategies, data migration approaches, and phased cutover models
Identify optimization opportunities to reduce latency, increase throughput, and improve resilience
Design integration patterns with Core banking and authorization systems, Card schemes (Visa, Mastercard, domestic networks), Fraud, AML, and risk systems
Enable transition from ISO 8583 to API/REST-based architectures
Required Skills & Experience
10+ years in payment switching with deep expertise in FIS IST platform
Proven experience in enterprise-scale switch architecture and transformation programs
Strong command over ISO 8583, transaction lifecycle, and routing logic
Expertise in:
Distributed systems and micro-services architecture
API-first and event-driven designs
Hybrid/cloud infrastructure models
Strong understanding of HSMs, cryptography, and secure transaction processing
Domain Expertise on Card payment ecosystems (ATM, POS, e-commerce), Scheme connectivity and certification processes, ATM operations, reconciliation, dispute management
Please visit https://colate.io/
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