Senior Linux Engineer, Privileged Access

Senior Linux Engineer, Privileged AccessRemote, USKeeper 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.Keeper Security is one of the fastest-growing cybersecurity software companies that protects thousands of organizations and millions of people in over 150 countries. Keeper is a pioneer of zero-knowledge and zero-trust security built for any IT environment. Its core offering, KeeperPAM®, is an AI-enabled, cloud-native platform that protects all users, devices and infrastructure from cyber attacks. Recognized for its innovation in the Gartner Magic Quadrant for Privileged Access Management (PAM), Keeper secures passwords and passkeys, infrastructure secrets, remote connections and endpoints with role-based enforcement policies, least privilege and just-in-time access. Learn why Keeper is trusted by leading organizations to defend against modern adversaries at KeeperSecurity.com.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.ResponsibilitiesDesign, develop and maintain Linux endpoint privilege management capabilities across Rust, C and.NET componentsBuild and enhance kernel-facing agent functionality using Linux interfaces such as fanotify, the proc filesystem, namespaces, capabilities and process identityDevelop and maintain native PAM modules and Linux privilege-elevation workflowsBuild long-running privileged Linux services using Rust, Tokio, MQTT, TLS and asynchronous programming patternsDevelop Linux-specific orchestration and session-management capabilities in.NET 8, including process authentication, access controls, ephemeral accounts and session monitoringDiagnose complex Linux execution and security issues involving blocked processes, authentication races, permissions, SELinux, AppArmor and system service behaviorDesign secure privilege-enforcement mechanisms based on least privilege, process trust and protection against time-of-check/time-of-use (TOCTOU) and authorization race conditionsBuild and maintain systemd services, RPM and DEB packages, installation workflows, service hardening and operational diagnosticsCollaborate with PAM, endpoint, QA and platform engineers on architecture, testing, cross-platform functionality and production troubleshootingUse AI-assisted development tools such as Claude, ChatGPT, GitHub Copilot or similar platforms to improve systems research, debugging, code development, testing and technical documentationRequirements7+ years of professional software or systems engineering experience, with significant hands-on Linux systems programming experienceDeep understanding of Linux process and security concepts, including the proc filesystem, user and group IDs, Linux capabilities, namespaces and process executionStrong C programming experience, including native Linux development, memory management, GCC and Make-based build workflows and defensive error handlingExperience developing or integrating with Linux PAM and PAM configurationStrong Rust experience, including ownership, concurrency, asynchronous development and long-running service or daemon designExperience with Tokio or similar asynchronous Rust frameworksWorking proficiency with C# and.NET in Linux environmentsExperience developing security-sensitive software involving authentication, authorization, privilege elevation, process trust or least-privilege controlsStrong understanding of Linux service management and operations, including systemd, journalctl, SELinux and/or AppArmor, and RPM/DEB packagingExperience troubleshooting low-level Linux behavior using system logs, process inspection, tracing and reproducible test toolsAbility to read Linux kernel and subsystem documentation and translate system behavior into secure production implementationsAbility and willingness to use AI-assisted tools effectively to support systems programming, debugging, technical analysis, testing and documentationBachelor's degree in Computer Science, Engineering or a related field, or equivalent practical experiencePreferred QualificationsExperience with MQTT or other event-driven messaging technologies used for agent, plugin or job executionExperience with Linux desktop session technologies, including X11, Wayland, GDM and D-BusFamiliarity with TLS, PKI, code signing and certificate-based process or plugin authenticationExperience supporting multiple Linux distributions, particularly RHEL and Ubuntu, including differences between SELinux and AppArmorExperience with endpoint privilege management, privileged access management or endpoint security productsFamiliarity with Avalonia or another cross-platform Linux desktop UI frameworkExperience building Linux software for x86 and ARM architectures, including packaging and signing pipelinesFamiliarity with endpoint security architectures on Windows or macOSStrong understanding of authorization models such as allow, deny, approval and just-in-time elevation workflowsBenefitsMedical, Dental & Vision (inclusive of domestic partnerships)Employer Paid Life Insurance & Employee/Spouse/Child Supplemental LifeVoluntary Short/Long Term Disability Insurance401K (Roth/Traditional)A generous PTO plan that celebrates your commitment and seniority (including paid Bereavement/Jury Duty, etc.)Above-market annual bonusesKeeper Security, Inc. is an equal opportunity employer and participant in the U.S. Federal E-Verify program. We celebrate diversity and are committed to creating an inclusive environment for all employees.Classification: ExemptKeeper Candidate Privacy NoticeThis notice explains how Keeper Security processes your personal data during recruitment. Depending on the role and location, the Controller of personal data (the organization responsible for determining why and how personal data is processed) will be Keeper Security Inc. (US), Keeper Security EMEA Ltd. (Ireland), or Keeper Security APAC K.K (Japan).1. Data We CollectInformation You provide:Contact details, CV/resume, cover letterEmployment history, qualifications, work eligibilityApplication responses and uploaded documentsInformation We generate:Interview notes, assessments, communicationsScheduling informationInformation From Others:Recruiter/referral information who submit your profileReferences (with your consent, before final offer)Public professional profilesBackground verification (post offer)Voluntary Diversity and Equal Opportunity InformationWe may ask you to voluntarily provide diversity information including race/ethnicity, gender, disability status and veteran status (US). Providing this information is optional and Keeper collects this data in order to comply with EEOC and similar requirements2. How We Use Your DataAssess your application and suitabilityManage interviews and recruitment workflowConsider you for other/future roles (we may seek your consent to keep your information on our systems beyond the retention period specified)Comply with employment law obligations3. Legal Basis Keeper Security