Borek Zabrze

Maintain 99.5% enterprise infrastructure uptime across 200+ Linux/Windows servers, reducing unplanned downtime by 40% through proactive monitoring and automated failover. Resolve L2/L3 incidents with MTTR reduced from 4 hours to around 1.5 hours through RCA and monitoring improvements.

Configured VMware HA clusters to sustain 99.95% availability across 150+ virtual machines serving Central European clients. Shortened failover duration from 8 minutes to under 1 minute through proactive DRS configuration and affinity rule tuning.

Delivered distributed infrastructure support across 50+ sites, sustaining 99.93% availability for production workloads. Diagnosed TCP/IP stack issues across hybrid networks, cutting mean time to detection (MTTD) by 45% through packet analysis workflows.

Performed 24/7 monitoring of CPaaS platform handling 10,000+ daily API transactions, detecting 95% of anomalies before customer impact. Managed SLA incident workflows for 15+ enterprise clients, consistently achieving uptime commitments across four consecutive quarters.

Deployed temporary network infrastructure for 12+ global sporting events, achieving consistent on-site connectivity throughout each tournament duration. Supplied real-time systems support for live scoring and video feeds, recovering 9 critical outages within 15 minutes during active matches.