Senior Linux Hacker & Nix Wizard

Virtus Lab sp. z o.o. (Ltd.); Kraków, Kielce; On-site; PLN 180,000 - 280,000; Full time

Job summary

Virtus Lab sp. z o.o. (Ltd.) seeks a Linux Hacker & Nix Wizard (Senior/Expert) to join our Kraków team. You will tackle Linux internals, memory management, IPC, and system calls, while optimizing Python performance and enabling Nix/NixOS configurations.

You should have fluent English, strong problem-solving skills, and a hands-on, ownership-driven mindset to work on reproducible builds and advanced diagnostics in a fast-growing tech environment.

Qualifications

• Deep, hacker-level knowledge 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.

Skills

Linux internals

Nix/NixOS

Python

English (C1)

System architecture

Self-driven

Job description

Virtus Lab sp. z o.o. (Ltd.) seeks a Linux Hacker & Nix Wizard (Senior/Expert) to join our Kraków team. You will tackle Linux internals, memory management, IPC, and system calls, while optimizing Python performance and enabling Nix/NixOS configurations.

You should have fluent English, strong problem-solving skills, and a hands-on, ownership-driven mindset to work on reproducible builds and advanced diagnostics in a fast-growing tech environment.