Job description

We are #VLteam - tech enthusiasts constantly striving for growth. The team is our foundation, that's why we care the most about the friendly atmosphere, a lot of self-development opportunities and good working conditions (yes, that also means attractive salaries). Trust and autonomy are two essential qualities that drive our performance. We simply believe in the idea of ​​“measuring outcomes, not hours”. Join us & see for yourself!

Job requirements

Linux Hacker & Nix Wizard

Details: Linux Hacker & Nix Wizard (Senior / Expert)

Required skills

Linux Core or Low-Level Linux Kernel Internals - Advanced

Nix - Advanced / Regular

Python Programming- Expert

English Communication: C1 - Advanced

System Architecture & Automation - Advanced

Self-driven & Problem Solving - Advanced

Desired professional profile & core competencies

• Deep, hacker-level understanding of Linux internals, memory management, IPC, and system calls.

• Expert-level mastery of Python (performance optimisation, async execution, C/Rust interop).

• Hands-on expertise with Nix / NixOS or strong mastery of declarative system configuration & reproducible builds.

• Advanced experience with low-level kernel diagnostics and profiling (eBPF, perf, strace, valgrind).

• Fluent command of spoken and written English.

• Uncompromising ownership, analytical rigour, and a natural instinct for deep technical problem-solving.

Advanced Linux internals, expert Python, Nix/NixOS, low-level kernel diagnostics (eBPF, perf, strace, valgrind), fluent English (C1), self-driven problem solving.

Key Responsibilities

• developing Linux systems
• automating system configuration
• optimizing performance

Skills & Tools

Linux, Nix, NixOS, Python, eBPF, perf, strace, valgrind

Job Details

• Category: Software Development
• Seniority: Senior Level
• Commitment: Full Time
• Workplace: Remote — Kraków or Kielce or Wrocław or Poland
• Languages: English

About VirtusLab

A tech company of enthusiasts focused on growth, friendly atmosphere, and self-development opportunities. — Industry: Information Technology