Senior Card Specialist

To provide senior specialist technical ownership of the bank's real-time card and payment processing platforms (currently ACI Postilion, spanning issuing, acquiring, switching, authorisation, tokenisation, fraud interfaces and scheme integration) together with their supporting database, cryptographic and integration layers. Accountable for the end-to-end health of these high-availability platforms, resilience, security, performance, capacity and preventative maintenance. Responsible for controlled change and 24x7 operational support, delivering scheme, regulatory and business change safely under shared Run-the-Bank and Change-the-Bank accountability with peers. Leads incident response and root cause elimination for assigned platforms, acts as technical counterpart to business and vendors, coaches Card Specialists, and builds the documented, transferable platform knowledge that reduces key-person dependency.