Senior Linux Engineer, Privileged Access

Keeper Security

4d • Remote

About The Position

Keeper Security is hiring a Senior Linux Systems Engineer to join our 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. Keeper’s cybersecurity software is trusted by millions of people and thousands of organizations globally. Keeper is published in 23 languages and sold in over 150 countries. Join one of the fastest-growing cybersecurity companies and help build low-level Linux security capabilities that enforce least privilege, secure process execution and privileged access across enterprise endpoints.

As a Senior Linux Systems Engineer on Keeper’s PAM team, you will design and build security-sensitive components that control privileged execution and elevation on Linux endpoints. This is a systems engineering role focused on endpoint privilege management, process authorization, Linux security boundaries and long-running privileged services. You will work across a Rust-based Linux agent, native C PAM modules and .NET services running on Linux. The role requires strong knowledge of Linux internals and the ability to reason carefully about process identity, permissions, authentication, kernel-facing APIs and secure failure behavior. This is not a traditional application development role; the work operates close to the Linux operating system and directly influences how privileged processes are authorized and executed.

Requirements

• 7+ years of professional software or systems engineering experience, with significant hands-on Linux systems programming experience
• Deep understanding of Linux process and security concepts, including the proc filesystem, user and group IDs, Linux capabilities, namespaces and process execution
• Strong C programming experience, including native Linux development, memory management, GCC and Make-based build workflows and defensive error handling
• Experience developing or integrating with Linux PAM and PAM configuration
• Strong Rust experience, including ownership, concurrency, asynchronous development and long-running service or daemon design
• Experience with Tokio or similar asynchronous Rust frameworks
• Working proficiency with C# and .NET in Linux environments
• Experience developing security-sensitive software involving authentication, authorization, privilege elevation, process trust or least-privilege controls
• Strong understanding of Linux service management and operations, including systemd, journalctl, SELinux and/or AppArmor, and RPM/DEB packaging
• Experience troubleshooting low-level Linux behavior using system logs, process inspection, tracing and reproducible test tools
• Ability to read Linux kernel and subsystem documentation and translate system behavior into secure production implementations
• Ability and willingness to use AI-assisted tools effectively to support systems programming, debugging, technical analysis, testing and documentation
• Bachelor’s degree in Computer Science, Engineering or a related field, or equivalent practical experience

Nice To Haves

• Experience with MQTT or other event-driven messaging technologies used for agent, plugin or job execution
• Experience with Linux desktop session technologies, including X11, Wayland, GDM and D-Bus
• Familiarity with TLS, PKI, code signing and certificate-based process or plugin authentication
• Experience supporting multiple Linux distributions, particularly RHEL and Ubuntu, including differences between SELinux and AppArmor
• Experience with endpoint privilege management, privileged access management or endpoint security products
• Familiarity with Avalonia or another cross-platform Linux desktop UI framework
• Experience building Linux software for x86 and ARM architectures, including packaging and signing pipelines
• Familiarity with endpoint security architectures on Windows or macOS
• Strong understanding of authorization models such as allow, deny, approval and just-in-time elevation workflows

Responsibilities

• Design, develop and maintain Linux endpoint privilege management capabilities across Rust, C and .NET components
• Build and enhance kernel-facing agent functionality using Linux interfaces such as fanotify, the 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 protection against time-of-check/time-of-use (TOCTOU) and authorization race conditions
• Build and maintain systemd services, RPM and DEB packages, 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 such as Claude, ChatGPT, GitHub Copilot or similar platforms to improve systems research, debugging, code development, testing and technical documentation

Benefits

• Medical, Dental & Vision (inclusive of domestic partnerships)
• Employer Paid Life Insurance & Employee/Spouse/Child Supplemental Life
• Voluntary Short/Long Term Disability Insurance
• 401K (Roth/Traditional)
• A generous PTO plan that celebrates your commitment and seniority (including paid Bereavement/Jury Duty, etc.)
• Above-market annual bonuses

What This Job Offers

• Job Type: Full-time
• Career Level: Senior