We're working with a major organisation delivering a large-scale payments transformation and they're looking for an experienced FIS IST Switch Expert to lead the future architecture of their switching estate.

This is a senior architecture role focused on designing, modernising and optimising the FIS IST platform across ATM, POS and digital payment channels. You'll own target-state architecture, drive resilience and performance improvements, and lead migration from legacy switching platforms while ensuring seamless transaction processing and regulatory compliance.

Key Responsibilities

• Define and own the FIS IST target architecture
• Design highly available, active-active and disaster recovery solutions
• Lead architecture across routing, authorisation, clearing and settlement flows
• Drive migration from legacy switching platforms to FIS IST
• Develop coexistence, data migration and cutover strategies
• Improve platform performance, scalability and resilience
• Design integrations with core banking, card schemes, fraud and risk platforms
• Support the transition towards API-led and modern integration architectures

What You'll Bring

• Extensive experience with the FIS IST platform
• Strong background in payment switching architecture
• Proven delivery of switch transformation and migration programmes
• Deep knowledge of ISO 8583 and payment transaction processing
• Experience with distributed systems, microservices and API-first architectures
• Understanding of cloud and hybrid infrastructure environments
• Strong knowledge of HSMs, cryptography and secure payments
• Experience working with Visa, Mastercard and other scheme networks
• Understanding of ATM operations, reconciliation and dispute processes