Windows Engineer | Mid-Senior | C#/.NET

At Nord Security’s B2B team, we build cybersecurity products that enable businesses to protect themselves and their data.

From product and engineering to sales, marketing, and data — our teams work closely together to deliver secure, scalable solutions trusted by companies around the world.

Your impact? Empowering businesses everywhere to keep their people, systems, and data safe.

Main Responsibilities

• Design, develop, and maintain Windows applications and system components - Services, IPC, networking, GUI, APIs, and drivers.
• Collaborate with designers, QA, and the Product Owner to extend and improve the functionality of our product, from early technical discussions to final delivery.
• Take ownership of features end-to-end: research solutions, write clean and maintainable code, and see your work through to release.
• Contribute to architectural decisions and help shape the technical direction.

Core Requirements

• Proven Experience: minimum 3+ years of experience in Windows application development using .NET.
• Windows API Proficiency: deep familiarity with Windows API, including experience with multithreading, inter-process communication, and memory management.
• Debugging & Troubleshooting: excellent debugging and troubleshooting skills with experience using Windows debugging tools.
• Experience in Agile & Git.
• Profound English language skills.

Bonus Points For

• Good understanding of networking protocols (TCP/IP, UDP), VPN technologies (OpenVPN, WireGuard, IPSec), and network security principles.
• Good understanding of security best practices and a commitment to writing secure code.

What We Offer

• Sharpen your edge: training, mentorship, and room to grow — always.
• Take the time you need: extra vacation days, sick days, and time off when life calls.
• Get premium healthcare: private health insurance in Lithuania and Poland — fully covered.
• Protect your peace: enjoy free subscriptions to Calm, Headspace, and Mindletic, and our own resilience and mindfulness trainings.
• Own your fitness: in-house gyms, sport cards, online workouts, and personal guidance — on us.
• Pack your bags for workation: experience our company-wide trip abroad to the fullest.
• Work from anywhere: work from wherever keeps you in the zone.
• Celebrate your milestones: birthdays, weddings, and new family members — all deserve a gift.
• Parent with ease: children’s summer camps and flexibility around the schedule — because parenting never pauses.
• Join the party: team building and company events people talk about for months.
• Unlock Cyber City: coffee bar, open gyms, kids’ room, music room, massage chairs — our Vilnius HQ is yours to enjoy.

Kindly refer to our Privacy Notice for Recruitment Candidates for comprehensive information regarding our data handling procedures throughout recruitment processes.

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].