H. Umit E.Private profile: Upwork shows its earnings only to signed-in members, so we check it every few weeks, not daily. MRR here is a rough estimate (Upwork's six-month earnings ÷ months active). Last read Nov 5, 2026.

Senior Linux Platform Engineer | Performance & Network Debugging $65.00/hr I help diagnose and fix complex Linux issues in production environments. If your system behaves strangely (high load with low CPU usage, network instability, random slowdowns), I focus on identifying the real root cause quickly instead of applying temporary fixes. Clients usually come to me when: - something is not working as expected - previous attempts did not solve the issue - the problem is not obvious I am a senior Linux engineer with 20+ years of experience working on production systems, including distributed and high-availability environments. In my most recent role, I supported a Linux-based platform used in satellite communication systems. I worked across OS, network, storage, hardware, and virtualization layers, troubleshooting issues that required understanding how systems behave under real conditions. I also have six years of hands-on experience managing Dell PowerEdge servers through iDRAC, including: - iDRAC firmware upgrades and lifecycle management - remote Linux and VMware ESXi installation through the iDRAC virtual console - storage/RAID management through the iDRAC web interface - failed-disk detection and replacement workflows - hardware troubleshooting and remote recovery - accessing and troubleshooting iDRAC from VMware ESXi environments Some of the work I do regularly: - Investigating performance issues across multiple layers (CPU, I/O, network, application) - Debugging production problems using strace, tcpdump, and system-level metrics - Supporting large-scale OS upgrades (RHEL 6 → 7 → 9) with minimal downtime - Maintaining build systems that generate ISO/OVA images for production deployments - Supporting VMware environments (ESXi, vCenter) - Working closely with developers and support teams to identify real causes behind incidents Typical problems I help with: - High system load and performance bottlenecks - Network issues (MTU mismatch, latency, routing, DNS) - Linux debugging (process-level and system-level) - Service instability and unexpected behavior - Container-related issues (Docker / Kubernetes basics) - System tuning and long-term reliability improvements - Dell PowerEdge / iDRAC remote administration, storage, and hardware troubleshooting Tools I use regularly: top, vmstat, iostat, strace, tcpdump, netstat, ss, dig, systemctl, dmesg, log analysis I prefer clear communication, practical solutions, and fast turnaround when possible. I am also open to long-term collaboration if a strong match is established.