Application Security Engineer

AT NORD SECURITY, WE’RE CREATING A SAFER CYBER FUTURE.

We help people and businesses take back control of their online security, privacy, and data. From VPNs to password managers, threat intelligence to eSIMs for travel—our teams turn complex problems into solutions trusted by millions worldwide.

Life is online. In this role, you’ll help people own it.

MAIN RESPONSIBILITIES

• Conduct security reviews of application designs, source code, and third-party libraries;
• Perform regular application vulnerability assessments using both automated tools and manual testing techniques (e.g., SAST, DAST, SCA, penetration testing);
• Collaborate with development teams to design secure architectures and implement security controls;
• Help maintain security tools, scripts, and processes to support secure development;
• Stay current with industry trends, zero-day vulnerabilities, and best practices in application security;
• Develop scripts, security automation tools to enhance application security testing processes;
• Design and deliver training for security engineering awareness & adoption;
• Actively look for internal security gaps within the product or organization overall.
• Ensure mobile/desktop applications are sufficiently tested and support internal and external audits;

CORE REQUIREMENTS

• Proven experience in mobile/desktop application security assessment planning, testing, methodologies, and vulnerability reporting;
• Strong understanding of secure coding practices;
• Ability to perform manual security code audit;
• Proficiency in at least one low-level programming language (e.g. C, C++, Rust, Go).
• Solid understanding of networking protocols such as TCP, UDP and the HTTP protocol.
• Familiarity with debuggers (e.g. GDB, LLDB, WinDbg).
• Familiarity with reverse engineering tools (e.g. Ghidra, IDA).
• Solid understanding of memory corruption issues, buffer overflows and related vulnerability classes.
• Familiarity with common authentication and authorization protocols (OAuth, SAML, JWT, etc.).
• Ability to work with networking tools such as Wireshark, tcpdump.
• Ability to quickly assimilate new technologies and tools;
• Sense of ownership with strong problem solving and investigation skills;
• Ability to build and maintain relationships, influence key stakeholders across the business;
• Bonus points for community contributions like public CVEs, bug bounty recognition, open-source tools, blogs, etc.

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.