Linux Systems Engineer

About InstaSafe InstaSafe is a Zero Trust cybersecurity leader, helping global enterprises secure users, applications, and infrastructure across hybrid and cloud environments. Our Zero Trust Network Access (ZTNA), Identity & Access Management (IAM), and Multi-Factor Authentication (MFA) solutions protect over 500,000 endpoints worldwide. We are seeking a Linux Systems Engineer to build secure endpoint agents that extend Zero Trust policies to Linux-based systems. This includes the ISA Linux Agent and ZTA Linux Agent, which integrate with authentication protocols, PAM modules, and networking components to ensure secure, policy-driven access to enterprise applications. Role Overview The Linux Systems Engineer will design, develop, and maintain system-level Linux agents. The role requires proficiency in C/C++, PAM module development, OpenSSL, and Linux networking internals. You will work on deep OS integrations (systemd, daemons, packaging), enabling Linux endpoints to act as fully trusted nodes in the Zero Trust ecosystem. Duties & Responsibilities Agent Development: Design and implement secure Linux endpoint agents for Zero Trust authentication and access control. Authentication Integration: Develop and extend Pluggable Authentication Modules (PAM) for MFA, SSO, and secure login enforcement. Networking & Security: Work with iptables/netfilter, TLS/SSL (OpenSSL), and VPN/ZTNA protocols to secure data in transit. System-Level Work: Develop systemd services, daemons, and ensure proper Linux packaging (.deb, .rpm). API Integration: Connect agents with backend controllers/gateways using REST APIs and secure token exchanges (OAuth2, JWT). Debugging & Troubleshooting: Use Linux system debugging, logging, and packet inspection tools to resolve issues. Collaboration: Partner with cross-platform teams (Windows, Mac, Android, iOS) to ensure feature parity across endpoint clients. Continuous Learning: Keep updated on Linux kernel and security enhancements, applying them to strengthen endpoint security. Requirements Qualifications & Skills Education & Experience: Bachelor’s/Master’s in Computer Science, Engineering, or related field. 3–6 years of experience in Linux systems software development. Core Technical Skills: C Programming / C++ Shell Scripting (Bash) Linux Systemd PAM Modules OpenSSL Linux Networking (iptables/netfilter) Deb/RPM Packaging REST APIs Preferred/Good-to-Have: Experience with kernel modules or low-level drivers. Familiarity with container environments (Docker/Kubernetes). Knowledge of Zero Trust / VPN protocols (IPSec, OpenVPN, WireGuard). Familiarity with SELinux/AppArmor security frameworks. Benefits Career Value Proposition Build mission-critical Linux endpoint security agents used in Fortune 500 enterprises. Work on deep system-level programming that combines authentication, networking, and security. Collaborate with world-class engineers across OS platforms. Gain expertise in Zero Trust security and enterprise networking protocols.