Application Security Engineer | Mid-Senior | Low-level

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.