Sr. Linux Administrator

About the position

At IEX, we’re passionate about building technology that moves industries forward. Our story began when we built a stock exchange designed to deliver high-performance results for all investors. Our belief is that technology should level the playing field so that opportunity is equitable. We are applying what we learned from building a high-performance stock exchange to build technology that solves for complexity and accelerates growth in other areas. We aspire to build a trusted, disciplined, and diversified business. Our goal is to build transformative technology without ever compromising our integrity - and we’re just getting started! We are seeking a highly skilled and experienced Senior Linux Administrator with strong expertise in Linux Administration and automation using Python and developing/consuming APIs. The ideal candidate will be responsible for managing complex Linux-based environments, driving infrastructure automation, improving system reliability, and enabling integrations through robust APIs. If the following motto applies to you: "Obsessed about building platforms through Automation and Tooling, and getting Clarity through Observability and Monitoring," then we should talk.

Responsibilities

• Manage, configure, and maintain enterprise-scale Linux systems (primarily Ubuntu).
• Monitor system performance in Prometheus, conduct tuning, and ensure high availability and disaster recovery readiness.
• Apply security best practices, patch management, and hardening of systems.
• Design and implement automation tools/scripts using Python for routine system tasks, deployments, monitoring, and reporting.
• Develop and maintain Ansible playbooks, shell scripts, or other IaC tools to automate infrastructure management.
• Create self-service tools and scripts to enable developer and DevOps efficiency.
• Develop and maintain RESTful APIs to enable system integrations and services.
• Create Python-based tools to consume third-party APIs for orchestration or reporting purposes.
• Document and maintain API endpoints, security configurations, and access control mechanisms.
• Implement and maintain centralized logging and monitoring solutions (e.g., Prometheus/Grafana, Graylog, etc.).
• Automate alerting and remediation actions based on system health and performance metrics.
• Work closely with DevOps, developers, and security teams to ensure seamless CI/CD pipeline integrations and secure infrastructure.
• Provide tier-3 support for developer issues, troubleshooting system and application problems.
• Create detailed documentation for system configurations, procedures, automation scripts, and APIs.
• Mentor junior team members and participate in training sessions or technical knowledge sharing.

Requirements

• 5+ years of experience in Linux administration in production environments.
• Strong hands-on experience with Python for automation and tool development.
• Proficiency with RESTful API design, development, and integration.
• Experience with configuration management tools (e.g., Ansible).
• Solid understanding of networking concepts, firewalls, and security practices.
• Familiarity with container technologies (e.g., Docker) and virtualization platforms.
• Excellent problem-solving skills and attention to detail.
• Strong written and verbal communication skills.

Nice-to-haves

• Experience with Storage platforms (EMC, Pure, Vast, etc.).
• Experience with Virtualization technologies like VMWare.

Benefits

• Eligible for bonus and equity.