Sadhana Madhu

• Administered Linux systems, enhancing user management, log analysis, cron scheduling, and performance optimization for operational efficiency.
• Onboarded and deployed databases onto target host environments, ensuring secure configuration, connectivity, and operational readiness.
• Managed threat and vulnerability lifecycle, collaborating with security teams to identify and remediate vulnerabilities, strengthening overall system security.
• Performed network and system troubleshooting with hands-on exposure to basic network configuration, monitoring, and connectivity issue resolution.
• Investigated and resolved incidents by reproducing issues, conducting root cause analysis, and implementing corrective actions.
• Owned end-to-end incident management, including logging, triage, escalation to L3/vendors, resolution, and RCA documentation.
• Executed server maintenance and patch management across Linux environments, ensuring system stability, security, and optimal performance.
• Conducted cross-layer troubleshooting of application, database, OS, and network issues reported by users.
• Utilized SQL for diagnostics and monitoring, querying databases for issue analysis, performance checks, and reporting.
• Collaborated with cross-functional teams at PayPal to ensure system compliance, reliability, and operational continuity.
• Developed technical documentation and knowledge base articles to streamline support processes and reduce recurring incidents.
• Monitored system health and alerts using enterprise monitoring tools to proactively detect and resolve issues.
• Supported change and release management, including implementation validation and post-change reviews in production environments.

Provided end-to-end infrastructure support for PayPal’s production and staging environments, specializing in Linux server administration and threat & vulnerability management. Performed SQL-based troubleshooting and resolved platform-related issues, ensuring high system availability and security compliance through proactive monitoring and cross-team collaboration.