Ivan S.

Assumed hands-on technical ownership of a complex Linux-based production infrastructure supporting over 100 customers and more than 50 virtual machines. Collaborated directly with major clients and their technical teams to define the technical approach, infrastructure requirements, and deployment model for EWA ERP solutions. Coordinated implementation activities across customer and internal teams by translating requirements into actionable deployment solutions. Systematically improved an inherited IT environment by addressing foundational infrastructure issues. Devised, deployed, and maintained virtualized environments using VMware and KVM, prioritizing reliability and performance. Developed and implemented infrastructure services such as DNS, DHCP, VPN, and monitoring solutions. Created custom infrastructure solutions using C, Perl, Bash, and PHP where standard software fell short. Managed multiple VPN environments including OpenVPN and IPsec while troubleshooting connectivity issues. Analyzed and resolved production problems and performance bottlenecks through in-depth investigation. Applied security measures including hardening, updates, and access controls. Maintained comprehensive technical documentation supporting infrastructure maintenance.

Held responsibility for the reliable operation and troubleshooting of the Linux-based infrastructure and public services. Optimized network infrastructure while addressing performance issues across interconnected systems. Monitored system performance, investigated problems, and implemented corrective actions to enhance stability. Addressed both infrastructure and service layers to ensure integrated operation of network and public-facing services. Identified opportunities for improvements in infrastructure with a focus on reliability and operational simplicity.

Conducted research in high-reliability data acquisition and distributed monitoring systems. Designed high-density distributed monitoring infrastructure including measurement stations and centralized data processing. Developed solutions for reliable data collection and management from field systems operating continuously. Employed systems engineering principles to optimize reliability and behavior of complex systems.