Zdravko Iskrenov

Prototyped two AI-driven Flutter applications with Firebase and S3 backends, optimizing Dart code for 300% faster startup. Packaged Stable Diffusion with CUDA-enabled Docker, reducing image size by 35% and cold-start latency by 55%. Delivered Linux automation and performance tuning for 32 clients, saving teams over 10 hours per week through tooling and system optimizations.

Designed and implemented a CI/CD ecosystem, migrating all pipelines to GitHub Actions post-acquisition, which reduced average package build time by 65% and release preparation time from 2 hours to 20 minutes. Defined and enforced organization-wide CI/CD and GitOps guardrails across 40 repositories and 3 product teams, enabling 100% automated deployments and reducing change lead time by 90%. Develo

Cut inter-DC sync window by 1600% using a custom BitTorrent-style nightly transfer for 100 GB of data, eliminating checksum errors. Deployed HA API edge with Nginx and Keepalived, and scaled Puppet to over 1400 nodes while maintaining configuration drift below 1%; led OS migrations (CentOS & RHEL 5 to 7) with zero unplanned downtime. Engineered multi-site MariaDB Galera & MongoDB clusters; tuned P

Delivered LAMP-stack support, handling over 40 incidents daily while consistently meeting SLA and CSAT benchmarks. Performed seamless Linux-based website migrations with zero data loss and minimal downtime. Maintained consistent top-tier performance and provided clear, empathetic customer communication.

Studied network technologies with a focus on English-language curriculum. Gained foundational knowledge in various networking concepts and protocols.