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InstaSafe

Linux Systems Engineer

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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
    .

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