Linux Application Support Engineer

We are seeking an experienced Application Support Engineer to join our production support team. In this role, you will be responsible for ensuring high availability, integrity, and performance across mission-critical banking, financial services, and payment processing applications.

You will investigate transaction drops, trace end-to-end payment flows, analyze application logs in Linux environments, and validate core accounting and transaction data in relational databases. A solid foundation in BFSI domain workflows and strong Linux command-line diagnostic capabilities are essential to succeed in this role.

Key Responsibilities

• Incident Triage & Resolution: Provide L2/L3 support for core banking, payment gateway, clearing/settlement, or trade-processing systems, addressing system alerts and user-reported incidents within strict SLAs.
• Linux-Based Troubleshooting: Connect to application servers to inspect runtime logs, tail active transactions, monitor batch processes, and identify bottlenecks or exceptions using standard command-line utilities.
• Transaction & Data Reconciliation: Investigate stuck or failed financial transactions (e.g., NEFT/RTGS, IMPS, SWIFT, card settlements, ACH), run SQL queries to verify ledger balances and transaction statuses, and execute authorized business data fixes.
• Batch & End-of-Day (EOD) Operations: Monitor scheduled financial batch jobs, end-of-day/beginning-of-day processing, and automated file transfers (SFTP/Connect:Direct); perform first-level recovery on failed batch runs.
• Application Service Operations: Handle application restarts, smoke-testing post-maintenance windows, deployment verification, and config updates on Linux-hosted application servers.
• Escalations & Root Cause Analysis (RCA): Coordinate closely with development teams, payment aggregators, network partners, and business operations to document detailed technical findings and contribute to post-incident RCA reviews.

Required Skills & Qualifications

• Experience: 3 to 6 years of dedicated Production Application Support experience.

• Domain Mandate: Proven, hands-on experience in BFSI (Banking, Financial Services, or Fintech/Payment Processing systems). Familiarity with financial messaging formats (ISO 8583, ISO 20022, or SWIFT MT/MX) or payment rails is required.

• Linux for Application Support:

• Proficiency using commands like grep, awk, sed, tail, find, curl, and jq for deep log analysis and transaction tracing.

• Practical ability to check application processes and resource utilization using ps, top, netstat/ss, and df.

• Competence in managing application configuration files and analyzing cron schedules.

• Database & SQL: Strong ability to write complex queries (SELECT, multi-table JOINs, aggregate functions) on Oracle, SQL Server, or PostgreSQL to audit transaction states and resolve data discrepancies.

• Interface & Protocol Knowledge: Solid understanding of API integrations (REST, SOAP), message payloads (JSON, XML), secure file transfers (SFTP), and basic connectivity verification.

• Process Discipline: Working familiarity with ITIL Incident, Problem, and Change Management frameworks (ServiceNow, Jira).