Production Support Specialist – Sparrow Switch & Card Payments Job Details · Preferred locations: Kolkata, Pune, Hyderabad, and Chennai, in order of preference. · Primary skills: Linux, databases, Sparrow Switch, card payments, and production support. · Secondary skills: SDLC, banking operations, ticketing tools, and ServiceNow. · Role type: Techno-functional production support. Role Summary We are seeking a techno-functional Production Support Specialist with strong expertise in the Sparrow Switch application, card payment systems, ATM and POS environments, and Unix/Linux shell scripting. The role is responsible for supporting business-critical payment applications, resolving production incidents, coordinating with external vendors and payment networks, and ensuring reliable service delivery within defined timelines. Key Responsibilities · Provide production support for the Sparrow Switch application and related payment systems. · Monitor, investigate, and resolve incidents and problems in the production environment. · Develop, maintain, and troubleshoot Unix/Linux shell scripts. · Support ATM and POS terminal-related applications and transaction flows. · Perform certification activities with Visa, MasterCard, and UPI. · Support scheme installation and configuration activities. · Analyze ISO 8583 messages, switch internal message formats, and terminal message formats. · Use interchange simulators for Visa, MasterCard, and UPI transaction testing. · Follow incident and problem management processes, including appropriate escalation and notification procedures. · Work to defined deadlines and escalate risks, failures, or delays promptly. · Prepare and maintain technical documentation in line with applicable standards, guidelines, and best practices. · Coordinate with CR2, Visa, MasterCard, other banks, vendors, and internal teams. Mandatory Skills and Experience · Strong hands-on knowledge of the Sparrow Switch application. · Strong experience in Unix/Linux shell scripting. · Experience supporting card payment systems and payment-domain applications. · Expert knowledge of ISO 8583 and switch internal message formats. · Experience with interchange simulators for Visa, MasterCard, and UPI. · Expertise in certification processes with Visa, MasterCard, and UPI. · Expert knowledge of payment scheme installation activities. · Strong understanding of SDLC and production support practices. · Experience in incident and problem management. · Ability to diagnose and resolve production issues quickly and effectively. · Working knowledge of databases, banking systems, and ticketing tools. Preferred Skills · Knowledge of ATM and POS terminals. · Experience with POS tools and terminal management systems. · Ability to decode terminal message formats. · Understanding of Hardware Security Module and A98 server application concepts. · Knowledge of the CardWorld Producer application on Windows Server 2008 and 2012. · Knowledge of BWAC application software for ATM connectivity with the Sparrow application. · Experience with CR2 products, including Studio and ATM branding tools. · Familiarity with technical documentation standards, guidelines, and best practices.