Volodymyr – Linux, Python, Kubernetes

Distributed infrastructure platform for a 24/7 internet service provider, supporting 15+ Proxmox clusters, 50+ nodes, and 300+ virtual machines, alongside Kubernetes, GPU computing, and business-critical network services.

• Designed and operated 24/7 production Linux infrastructure for an Internet Service Provider across 15+ distributed locations, including bare-metal, virtualized, Kubernetes, and cloud environments;
• Managed 50+ Proxmox nodes and 300+ virtual machines, including provisioning, lifecycle management, networking, resource allocation, and capacity planning;
• Developed Python and Bash automation and infrastructure as code using Ansible, Terraform, and SaltStack for provisioning, configuration management, monitoring, API integration, and operational workflows;
• Operated production Kubernetes and containerized workloads and supported distributed Linux compute infrastructure;
• Administered a Slurm-based GPU cluster used for flow-log analysis, including infrastructure supporting NVIDIA A100/H100 GPUs and InfiniBand;
• Troubleshot production Linux, compute, networking, storage, virtualization, and application infrastructure; participated in incident response, root-cause analysis, and long-term remediation;
• Maintained monitoring, metrics, alerting, and observability using Zabbix, PostgreSQL/TimescaleDB, Elasticsearch, and Graylog;
• Maintained customer-facing and internal PowerDNS/dnsdist infrastructure, including BGP-based Anycast DNS using ExaBGP and Juniper MX204/MX10003;
• Maintained high-availability Kea DHCP, per-cluster OpenLDAP/slapd replicas, and NTP using chrony to provide reliable local infrastructure services;
• Managed NetBox as IPAM/DCIM, integrating with SaltStack and Ansible to drive network and system automation;
• Led implementation of disaster recovery and business continuity solutions.

Distributed Linux infrastructure supporting customer-facing mobile, fiber, and TV services, spanning physical and virtualized environments, Kubernetes, and CDN/media delivery systems.

• Administered distributed Linux infrastructure supporting customer-facing Mobile, Fiber, and TV services;
• Developed automation for system provisioning, configuration management, monitoring, batch operations, and infrastructure administration;
• Managed Xen virtualization clusters, including provisioning, lifecycle management, networking, resource management, and production operations;
• Maintained Kubernetes infrastructure supporting a customer-facing TV and set-top-box management platform;
• Supported physical and virtualized Linux systems across distributed production environments;
• Operated distributed infrastructure including CDN platforms, Nginx, Varnish, IRDs, and related production systems;
• Troubleshot Linux, networking, virtualization, application, and service issues in production environments;
• Improved operational reliability through automation, monitoring, standardized configuration, and repeatable operational procedures.

Integrated audiovisual and broadcast infrastructure for major stadiums and live-production environments, featuring SMPTE ST 2110-based systems and IP networks supporting multi-channel broadcasting and playout.

• Designed and implemented integrated audiovisual and broadcast systems for major stadium projects;
• Led the implementation of SMPTE ST 2110-based systems for live production environments;
• Designed and managed IP broadcast networks supporting multi-channel playout;
• Developed technical specifications, system architectures, network designs, and deployment documentation;
• Coordinated system integration, commissioning, and acceptance with customers, vendors, and engineering teams.

Nationwide DVB-T2 digital terrestrial television broadcast infrastructure serving over 2 million subscribers across 167 retransmission sites and 32 TV channels, supported by a central headend for encoding, multiplexing, and continuous broadcast delivery.

• Managed a DVB-T2 digital terrestrial television headend serving more than 2 million subscribers;
• Designed and implemented VenueTV and IPTV solutions for international stadium projects;
• Architected integrated media production, networking, compute, and control infrastructure;
• Developed system specifications, architecture diagrams, deployment procedures, and automation logic;
• Performed systems integration, testing, deployment, commissioning, and operational readiness.