Core Expertise

Operating Systems

  • BSDs: FreeBSD (official Ports Committer, Poudriere, BastilleBSD, VNET/Jails, ZFS), OpenBSD, NetBSD
  • GNU/Linux: Debian, Ubuntu, Red Hat, CentOS, Rocky Linux and derivatives
  • Other: macOS, Solaris, AIX, Windows Server

Networking & Connectivity

  • Equipment: Cisco (ASR, Nexus, UCS, etc.), Juniper (SRX, etc.), MikroTik (RouterOS, CCR, 10G/100G), Ubiquiti, Extreme Networks, Brocade
  • Protocols: BGP (including Flowspec), OSPF, ISIS, PIM, IPv4/IPv6 dual-stack, RIPE NCC operations, peering & transit
  • Services: Firewalling (pf, pfSense, OPNsense, DynFi), VPN (WireGuard, IPsec, OpenVPN), Load Balancing (nginx, F5, Foundry, Aloha, Relayd), Netflow, DDoS mitigation, WiFi (802.1x, enterprise deployment)

Storage & Virtualization

  • Storage: ZFS (advanced usage, hybrid SSD/HDD), NetApp, Isilon, Nexenta, iSCSI, Fibre Channel
  • Virtualization: bhyve, VMware ESXi, Proxmox, QEMU, Xen, P2V migrations
  • High-availability and disaster recovery architectures

Development & Automation

  • Languages: C, Assembly, Python, Pike, Perl, Shell, Lua
  • Tools: Ansible, Puppet, SaltStack, Git, automation of deployment (PXE, Kickstart, RPM)
  • Low-level systems programming and performance optimization

Monitoring, Security & Observability

  • Tools: LibreNMS, Observium, Nagios, Zabbix, Centreon
  • Security hardening, firewall architecture, intrusion detection, and compliance

Energy & Specialized Solutions

  • Victron Energy systems (off-grid, hybrid, marine, monitoring & automation)
  • Home automation, Domoticz, Arduino

Other Notable Experiences

  • Large-scale platform migrations (Linux → FreeBSD)
  • Cloud & hosting platform architecture (SaaS, managed hosting)
  • Team leadership and presales / technical consulting
  • R&D (DNS, webmail, monitoring, trading platforms)

…and many other technologies. Feel free to contact me with your specific needs.