IST/Switch Application Support Specialist | Nair Systems | UAE

Position Summary Nair Systems is actively seeking an experienced, high-caliber, and technical IST/Switch Application Support Specialist with hands‐on experience in payment switching platforms within a production banking environment to join our expanding operations team on a full‐time permanent basis in the UAE. In this critical mission‐critical application support role, you will be responsible for monitoring real‐time transaction flows, ensuring high availability of the IST/Switch environment, resolving L2/L3 incidents, and managing end‐to‐end electronic funds transfer (EFT) lifecycle operations. You will leverage your deep specialist expertise in FIS IST/Switch platforms, ISO 8583 messaging protocols, hardware security modules (HSM), and Unix/Linux systems to deliver uncompromised payment transaction processing, high availability, and operational excellence. This opportunity offers competitive compensation, executive technical visibility, and exceptional career growth prospects within a premier global IT staffing and technology consulting enterprise. Detailed

Job Description
As an IST/Switch Application Support Specialist supporting Nair Systems in the UAE, you will take full operational, tactical, and technical ownership of payment switching production support, active/active dual-site configuration management, transaction routing, and settlement reconciliation. Your day‐to‐day responsibilities include monitoring real‐time transaction flows and ensuring high availability of the IST/Switch environment, investigating, diagnosing, and resolving L2/L3 incidents relating to transaction failures, authorization declines, timeouts, reconciliation breaks, and interface issues, performing rigorous root‐cause analysis (RCA) and driving problem management to prevent recurrence, participating in 24x7 on‐call or shift‐based support and major‐incident bridge calls, executing daily health checks, batch monitoring, end‐of‐day settlement, and reconciliation processes, managing HSM key operations, certificate renewals, and card‐scheme mandate updates, maintaining and tuning ISO 8583 message configurations, routing tables, BIN/institution setups, and stand‐in parameters, handling service requests, user access, and configuration changes through structured change‐management workflows, supporting new card product launches, scheme mandates, interface integrations, and switch upgrades/migrations, participating in SIT/UAT testing, release management, and disaster‐recovery/business‐continuity exercises under a 2‐week to 1‐month joining timeframe. You will utilize your proactive troubleshooting and analytical problem‐solving skills to resolve complex payment switching anomalies under strict operational service level agreements. Furthermore, you will manage application requirements by sending your latest resume in MS Word format via direct email to Nishanthini Suda at nishanthini.suda@nairsystems.com, ensuring strict compliance with the UAE on‐site presence and payment switching platform experience.

Key Responsibilities
Monitor real‐time transaction flows and ensure high availability across production IST/Switch (FIS) payment environments. Investigate, diagnose, and resolve L2/L3 incidents relating to transaction failures, authorization declines, and interface breaks. Conduct rigorous root‐cause analysis (RCA) and drive problem management to prevent recurrence of technical faults. Provide responsive on‐call or shift‐based support and participate actively in major‐incident bridge calls. Execute daily health checks, batch monitoring, end‐of‐day settlement, and reconciliation processes. Manage Hardware Security Module (HSM) key operations, certificate renewals, and card‐scheme mandate updates. Maintain, tune, and configure ISO 8583 message handling, routing tables, BIN/institution setups, and stand‐in parameters. Support card product launches, scheme mandates, interface integrations, and switch upgrades across testing and production. Required Qualifications & Skills Bachelor's degree in Computer Science, Information Technology, Software Engineering, or a related technical discipline. Minimum of 4+ years of progressive professional experience in payment switching support, application support, or banking IT. Strong, demonstrable hands‐on professional experience with the IST/Switch (FIS) payment switching platform in production banking. Comprehensive working knowledge of IST/Switch Active/Active setup with dual‐site implementation architectures. Deep practical proficiency in ISO 8583 messaging, EFT transaction lifecycles, authorization, clearing, and settlement. Practical familiarity with card‐scheme interfaces and certifications (Visa, Mastercard, mada, UAESWITCH, GCCNet). Solid working knowledge of HSM, key management, EMV, PCI DSS, and enterprise payment security standards. Proficient Unix/Linux operating system skills, shell scripting, SQL querying, and advanced log analysis capabilities. Exceptional analytical, troubleshoot