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

Department: NordVPN

Location: Vilnius

Employment Type: FullTime

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 3200 - 7000 EUR/Month.

What We Offer

Innovate with industry leaders

Work alongside global experts to build world-leading cybersecurity tools, impacting millions of users around the world.

Learn & grow

Boost your skills via our extensive training programs (online and offline) & other resources. Benefit from mentorship and career-switch opportunities to grow within the company. 

Work in a next-gen Cyber City office

Thrive in our bustling office, featuring ergonomic workspaces, modern meeting rooms, engaging events, and specialty coffee to fuel your day.

Hybrid work

Enjoy the flexibility with 3 office days and working from home for the remaining 2.

Work from anywhere

Recharge with a change of scenery – choose work from any location when you feel a need to power your creativity and drive.

Physical well-being

Boost your health with free-of-charge 24/7 gym access, onsite and online workouts, and consultations led by in-house Physical Well-Being experts. 

Mental & emotional health

Nurture your mind with free psychologist consultations, dedicated mental health events, and premium access to top-rated wellness apps like Calm, Headspace, and Mindletic.

Premium healthcare

Receive private health insurance giving you peace of mind for your health needs.

Extra days off

Enjoy additional vacation days off as you grow with us. Plus, get extra days for sick leave, special occasions, or parenting needs.

Joyful moments – special treats

Celebrate life’s big moments with special gifts from us on your birthday, anniversary, and other major events, such as weddings or the arrival of a new family member.

Company events & team-building

Experience iconic Nord Security celebrations, team-buildings, and knowledge-sharing events, nurturing bonds that fuel our success.

Workation

Embark on a legendary company getaway abroad, filled with exciting activities, live concerts, engaging workshops, and epic time together.

Kindly refer to our Privacy Notice for Recruitment Candidates for comprehensive information regarding our data handling procedures throughout recruitment processes: https://bit.ly/40GWyjL

We expect all candidates to provide accurate and complete information during the recruitment process. While limited use of AI tools to refine application materials is acceptable, candidates remain fully responsible for ensuring that their submissions reflect their own qualifications, skills, and experience. Any failure to do so may negatively affect participation in the recruitment process. If broader AI assistance is allowed for a particular role or stage, we’ll let you know in advance.

By submitting your application, you acknowledge that it may be processed using automated tools for evaluation purposes. As part of our recruitment process, we may use an AI-based application review tool to help assess applications based on skills and experience relevant to the role. This technology is used to support - not replace - human decision-making, and every application is ultimately reviewed by a recruiter.

If you would like more information about how AI is used in this process or wish to exercise your rights under applicable data privacy laws, please contact us at [email protected]. Should you prefer to opt out of the automated evaluation, please submit your application directly to [email protected].