Low-level engineer (Server side) | Mid-Senior | NordVPN

Full Time

hybrid

Infrastructure

Warsaw / Krakow

The world’s most advanced VPN, and a whole lot more.

If you’re a curious problem-solver who carves their own path, join the team behind Threat Protection Pro, the NordLynx protocol, and the fastest VPN on the planet—tools that put privacy, security, and control back in people’s hands.

Your impact? Helping millions take back control of their online security, privacy, and data.

Low Level Server side Team is responsible for delivering VPN server software used by millions of users worldwide

Main Responsibilities

Design and develop production-grade solutions where correctness and latency are both non-negotiable in Rust, Go or C;

Solve difficult problems in security, performance, privacy and networking at scale;

Collaborate closely with Low-Level and SRE teams across the full lifecycle - from architecture decisions to production deployment.

Core Requirements

Habit of going deep - reading RFCs, tracking kernel changelogs, understanding the why behind the stack;

Strong ownership mindset with the ability to independently lead and deliver software from conception to production;

Solid software engineering knowledge in at least one strongly typed programming language ;

Deep understanding of Linux operating system (firewalls, routing, networking, services, interrupts, etc.);

Advanced knowledge of networking protocols - UDP, TCP, IP v4/v6, DNS, QUIC, TLS, etc.

Good debugging skills

Experience with GitLab and understanding of core CI/CD principles;

Actively contributes to team knowledge through code reviews, documentation, and mentoring;

Virtualization (or/and containers) knowledge.

Don't worry if you do not tick all the boxes, we would still be interested in hearing from you. What we are trying to say by those requirements is that you must be focused on results and be a specialist in some 'particular' area.

Bonus Points For

Previous experience in C or C++;

eBPF;

Knowledge of VPN protocols WireGuard, OpenVPN;

Previous experience with Python;

5+ years experience;

Computer science degree.

Tools You Will Use

Rust, Go, C;

Gitlab

Python;

Linux;

Docker.

Salary Range

Gross Salary 19800 - 33400 PLN/Month

Perks we offer

Our global mission fuels our drive. But when you need that extra push - here’s a list of things to look forward to.

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Infrastructure

Warsaw / Krakow

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