Linux System Administrator

Duties & Responsibilities

• Develop and own protection metrics and alerting — build dashboards and alert pipelines that surface anomalies across a range of network and application-layer signals.
• Perform deep log analysis to identify overuse, scraping, abuse, DDoS, and attack patterns across millions of daily requests.
• Operate and tune cloud-based edge security controls — configure and update security policies, rate limiting, and adaptive protection rules in response to evolving threats.
• Enforce traffic controls — apply a range of mitigation strategies to abusive traffic while minimizing impact to legitimate users.
• Monitor continuously and respond quickly — triage incidents and either resolve them directly or escalate to development or sysadmin teams with clear, actionable information.
• Support protection across a mixed cloud and on-premises infrastructure.

Requirements

• Strong understanding of high-volume web service architecture — how traffic flows, where bottlenecks and abuse vectors appear, and how load balancers and edge infrastructure make routing decisions.
• Hands-on experience with a major cloud provider's security and networking stack.
• Solid grasp of HTTP/HTTPS protocol internals — headers, TLS behavior, connection patterns, and how these relate to traffic analysis and fingerprinting techniques.
• Experience analyzing traffic using network and application-layer signals including address-based, organizational, and transport-layer fingerprinting methods.
• Familiarity with common web server platforms, their log formats, and configuration.
• Ability to read, write, and tune access control and rate-limiting rules under pressure.
• Comfort working across hybrid infrastructure environments.

Preferred Skills

• Experience with advanced abuse mitigation techniques, including traffic redirection and challenge-response mechanisms.
• Scripting or automation experience (Python, Bash, or similar) for log parsing and rule generation.
• Prior work protecting high-traffic government or research platforms.
• Knowledge of bot detection techniques beyond simple blocking — behavioral signals, fingerprinting, headless browser detection, and similar approaches.
• Familiarity with evolving attacker tradecraft and how modern scrapers and abusers adapt to countermeasures.

Benefits

• Medical, dental and vision coverage
• 401k plan with employer contribution
• Paid holidays and vacation
• Tuition reimbursement