Nikita Bortnichuk
Nikita Bortnichuk

Linux Technical Support Engineer (L1/L2) | Junior Systems Administrator

Actively looking · Member since 3 Oct 2026
Location
Moscow, Russia
Desired salary
Unspecified
Work preference
Remote Only
Experience level
Junior

About

Professional summary

I am a customer-focused Linux Technical Support Engineer and junior systems administrator with more than four years of practical experience in Linux administration and infrastructure troubleshooting.

I work with Linux distributions including NixOS, Debian, Ubuntu, Arch, and Gentoo. My systems administration experience includes systemd lifecycle management, timers, cgroups, permissions, ACLs, umask, Btrfs subvolumes, and ext4 filesystems.

I have strong networking foundations across TCP/IP, VLANs, EtherChannel, OSPF, HSRP, VRRP, packet analysis, firewalling, and VPN connectivity. I use diagnostic tools such as Wireshark, journalctl, systemctl, ss, curl, dig, traceroute, mtr, strace, lsof, and openssl to investigate issues.

I build declarative infrastructure with Nix Flakes and manage containerized services using Podman, Docker, and systemd-nspawn. I have designed a multi-node environment with encrypted WireGuard and AmneziaWG mesh networking, isolated firewall policies, and production services.

I automate operational tasks with Python, Bash, and Fish. I am comfortable debugging REST APIs, processing JSON, using Git, and working with basic C and Rust.

I am seeking a fully remote technical support or junior systems administration role, with a preference for night shifts. I communicate fluently in English and am a native Russian speaker.

Skills

27 capabilities

Tech stack & tools

Working toolkit

Application Hosting

Languages & Frameworks

Experience

Career history

Multi-Node Declarative Infrastructure Personal Infrastructure Project

I designed and manage a three-node infrastructure spanning a workstation, ThinkPad laptop, and cloud VPS. The environment is declaratively managed with Nix Flakes and supported by more than 360 Git commits.

I configured an encrypted WireGuard and AmneziaWG overlay mesh network on 10.100.0.0/24 with isolated firewall policies. I deployed more than 15 production services, including media automation, Immich, RustDesk relay, and Syncthing, using agenix and Ed25519 asymmetric secret encryption.

Enterprise Network Diagnostic Lab School 21 / GNS3

I configured enterprise network topologies in GNS3, including 802.1Q VLAN segmentation, Port-Channel link aggregation, and OSPF dynamic routing.

I simulated gateway failover with HSRP through preemption and priority tuning. I diagnosed latency and packet loss using Wireshark packet captures and inspection.

Education

Learning history
No education data available.

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