Senior Linux Systems Engineer – PAM (Remote)

keepersecurity; United States; On-site; USD 130,000 - 170,000; Full time

Job summary

Keeper Security is hiring a Senior Linux Systems Engineer to join the Privileged Access Management team and help build secure endpoint privilege management capabilities for Linux environments. This is a 100% remote position, with an opportunity to work a hybrid schedule for candidates based in the Chicago, IL or El Dorado Hills, CA metro areas.

As a Senior Linux Systems Engineer, you will design and build security-sensitive components that control privileged execution and elevation on Linux

Qualifications

• 7+ years of professional software or systems engineering experience with Linux.
• Deep understanding of Linux processes, security concepts, including proc filesystem, IDs, namespaces and capabilities.
• Strong C programming experience with native Linux development, memory management, and defensive error handling.
• Experience developing or integrating with Linux PAM and PAM configuration.
• Strong Rust experience including concurrency, async development and long-running services.
• Experience with Tokio or similar asynchronous Rust frameworks.
• Working proficiency with C# and .NET in Linux environments.
• Experience with systemd, journalctl, SELinux or AppArmor, and RPM/DEB packaging.
• Experience troubleshooting low-level Linux execution and security issues.

Responsibilities

• Design, develop and maintain Linux endpoint privilege management across Rust, C and .NET components.
• Build and enhance kernel-facing agent functionality using Linux interfaces such as fanotify, proc filesystem, namespaces, capabilities and process identity.
• Develop and maintain native PAM modules and Linux privilege-elevation workflows.
• Build long-running privileged Linux services using Rust, Tokio, MQTT, TLS and asynchronous programming patterns.
• Develop Linux-specific orchestration and session-management capabilities in .NET 8, including process authentication, access controls, ephemeral accounts and session monitoring.
• Diagnose complex Linux execution and security issues involving blocked processes, authentication races, permissions, SELinux, AppArmor and system service behavior.
• Design secure privilege-enforcement mechanisms based on least privilege, process trust and TOCTOU protections.
• Build and maintain systemd services, RPM and DEB packaging, installation workflows, service hardening and operational diagnostics.
• Collaborate with PAM, endpoint, QA and platform engineers on architecture, testing, cross-platform functionality and production troubleshooting.
• Use AI-assisted development tools to improve systems research, debugging, code development, testing and technical documentation.

Skills

Linux internals

C programming

Rust

PAM modules

.NET on Linux

Security concepts

Process authorization

Systemd

Tokio

TLS

Asynchronous Rust

C# / .NET

Tools

GCC

Make

fanotify

proc filesystem

namespaces

capabilities

PAM

systemd

RPM/DEB packaging

TLS

Tokio

MQTT

Job description

Keeper Security is hiring a Senior Linux Systems Engineer to join the Privileged Access Management team and help build secure endpoint privilege management capabilities for Linux environments. This is a 100% remote position, with an opportunity to work a hybrid schedule for candidates based in the Chicago, IL or El Dorado Hills, CA metro areas.

As a Senior Linux Systems Engineer, you will design and build security-sensitive components that control privileged execution and elevation on Linux