Sep 2024 – Aug 2025 · 11 mos · Gurugram, Haryana, India · On-site

• Administered and maintained bare-metal and virtual Linux servers optimized for ultra-low latency in a high-frequency trading setup.
• Worked closely with developers and network engineers to deploy and support latency-sensitive trading applications, ensuring optimal CPU and memory resource usage.
• Monitored and analyzed system performance using tools like perf, htop, vmstat, sar, tcpdump, and custom latency benchmarks.
• Maintained time synchronization across systems using PTP (Precision Time Protocol) and NTP to ensure sub-microsecond accuracy critical to trading applications.
• Enforced tight security controls at the OS level to protect trading systems, including SSH hardening, access control, and auditing.
• Supported high-availability setups with redundant systems, RAID configurations, and instant failover capabilities to prevent trading disruptions.
• Enforced tight security controls at the OS level to protect trading systems, including SSH hardening, access control, and auditing.

Aug 2022 – Feb 2024 · 1 yr 6 mos · Gurugram, Haryana, India · Remote

• Managed and supported Linux systems—mainly CentOS, Ubuntu, and Amazon Linux—across development, testing, and production environments.
• Automated system provisioning, configuration, and deployment using tools such as Ansible.
• Managed AWS cloud infrastructure, including EC2, VPC, S3, IAM, RDS, CloudFront, Route 53, and CloudWatch, ensuring high availability and scalability.
• Created and managed S3 buckets using CLI and AWS Console for data backups, static file hosting, and integration with CloudFront as a CDN.
• Developed and enforced IAM policies, managing users, groups, and roles to uphold least-privilege access and AWS best security practices.
• Deployed and secured VPCs with custom subnets, route tables, NAT gateways, and network ACLs for isolated application environments.
• Monitored infrastructure and application performance using AWS CloudWatch, enabling log tracking, alerting, and diagnostics.
• Conducted log analysis and troubleshooting for Linux servers and cloud services, using tools like logrotate, CloudTrail, and Syslog.
• Used Git for version control and integrated repositories with Jenkins and other CI tools for automated deployment processes.

Oct 2021 – Aug 2022 · 10 mos · Delhi, India

• Created and managed virtual machines (VMs) for development, testing, and production, allocating resources based on workload requirements.
• Configured and managed LVM (Logical Volume Manager) and disk partitioning for efficient VM storage allocation and snapshot creation.
• Managed virtual networking using Linux bridges, Open vSwitch, and VLANs to support isolated and secure communication between VMs.
• Set up and maintained virtualized storage and integrated solutions like NFS, iSCSI, and shared volumes for clustered environments.
• Applied security best practices by implementing firewall rules (iptables/nftables), SELinux, and isolated VM networking.
• Performed regular backups and snapshots of virtual machines, and executed restoration procedures for disaster recovery and testing.
• Monitored resource utilization (CPU, memory, disk, I/O) of VMs and host systems using tools like top, htop, iostat, and Nagios

Sep 2019 – Jul 2021 · 1 yr 10 mos · Delhi, India · Hybrid

• Provided escalated support for L1 tickets related to Linux OS issues, including user management, file system permissions, service failures, and performance degradation.
• Managed and maintained Linux servers (RHEL, CentOS, Ubuntu) across development, QA, and production environments.
• Performed routine tasks such as package management, patching, cron job setup, log rotation, and kernel updates.
• Configured and managed standard services including SSH, FTP, NFS, DNS, DHCP, Apache/Nginx, and MySQL/PostgreSQL.
• Handled disk management using LVM and standard partitioning tools; performed mounting, resizing, and filesystem checks.
• Created and managed user accounts, groups, and permissions; implemented sudo policies based on team roles.