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Infrastructure Security Monitoring Engineer Meta - 4.0 Menlo Park, CA Job Details $122,000 - $181,000 a year 1 hour ago Qualifications Tooling Production systems Security threat response protocols Monitoring system implementation Risk assessment Cybersecurity investigations Incident response implementation IT security monitoring Full Job Description Meta's Network Production Engineering organization is seeking a Infrastructure Security Monitoring Engineer to help protect the global network infrastructure that underpins Meta's family of apps and services. In this role, you will design and build detection systems that identify malicious activity, anomalous traffic patterns, and network-layer threats across Meta's large-scale infrastructure. You will work at the intersection of network engineering and security, developing tooling and automation that enables rapid identification and response to threats targeting Meta's backbone, edge, and data center networks.

Infrastructure Security Monitoring Engineer Responsibilities:

Design and implement network threat detection systems that identify malicious traffic, protocol abuse, and anomalous behavior across Meta's global network infrastructure Develop and maintain automated detection pipelines that process high-volume network telemetry including flow data, packet captures, and routing protocol events Investigate network security incidents by analyzing traffic patterns, correlating signals across infrastructure layers, and producing detailed retrospectives Build and refine detection logic for network-layer threats such as DDoS, BGP hijacking, route leaks, and lateral movement across data center fabrics Collaborate with network engineering, security, and infrastructure teams to identify detection gaps and drive improvements to network visibility and coverage Instrument monitoring and alerting systems to surface anomalies in network behavior and reduce mean time to detection for active threats Participate in on-call rotations to respond to network security incidents, triage alerts, and implement mitigations during active events Contribute to the design and code review of detection frameworks, ensuring reliability, scalability, and maintainability of owned systems Evaluate network telemetry sources and propose enhancements to data collection infrastructure that improve detection fidelity and reduce blind spots Document detection methodologies, runbooks, and architectural decisions to support knowledge sharing across the team

Minimum Qualifications:

2+ years of experience in network security, network operations, or production engineering with a focus on threat detection or security monitoring Experience developing detection or monitoring tooling in at least one programming language such as Python, Go, or C++ Experience with network protocols and technologies including TCP/IP, BGP, DNS, and network flow analysis (e.g., NetFlow, sFlow, or IPFIX) Experience building or operating network security monitoring systems, including log aggregation, alerting pipelines, or anomaly detection at scale Experience investigating network security incidents, including traffic analysis, root cause identification, and post-incident documentation

Preferred Qualifications:

Familiarity with the

MITRE ATT&CK

for Enterprise or ICS frameworks and applying threat intelligence to network detection use cases Demonstrated ongoing AI skill development (e.g., prompt/context engineering, agent orchestration) and staying current with emerging AI technologies Experience adhering to and implementing responsible, ethical AI practices (e.g., risk assessment, bias mitigation, quality and accuracy reviews) Experience with stream processing or big data platforms used for real-time network telemetry analysis (e.g., Apache Kafka, Flink, or Spark) Experience with large-scale distributed network environments such as data center fabrics, backbone networks, or internet exchange points Experience applying machine learning techniques to network anomaly detection or traffic classification problems Demonstrated ability to integrate AI tools to optimize/redesign workflows and drive measurable impact (e.g., efficiency gains, quality improvements)

About Meta:

Meta builds technologies that help people connect, find communities, and grow businesses. When Facebook launched in 2004, it changed the way people connect. Apps like Messenger, Instagram and WhatsApp further empowered billions around the world. Now, Meta is moving beyond 2D screens toward immersive experiences like augmented and virtual reality to help build the next evolution in social technology. People who choose to build their careers by building with us at Meta help shape a future that will take us beyond what digital connection makes possible today—beyond the constraints of screens, the limits of distance, and even the rules of physics. Meta is proud to be an Equal Employment Opportunity and Affirmative Action employer. We do not discriminate based upon race, religion, color, national origin, sex (including pregnancy, childbirth, or related medical conditions), sexual orientation, gender, gender identity, gender expression, transgender status, sexual stereotypes, age, status as a protected veteran, status as an individual with a disability, or other applicable legally protected characteristics. We also consider qualified applicants with criminal histories, consistent with applicable federal, state and local law. Meta participates in the E-Verify program in certain locations, as required by law. Please note that Meta may leverage artificial intelligence and machine learning technologies in connection with applications for employment. Meta is committed to providing reasonable accommodations for candidates with disabilities in our recruiting process. If you need any assistance or accommodations due to a disability, please let us know at . $122,000/year to $181,000/year + bonus + equity + benefits Individual compensation is determined by skills, qualifications, experience, and location. Compensation details listed in this posting reflect the base hourly rate, monthly rate, or annual salary only, and do not include bonus, equity or sales incentives, if applicable. In addition to base compensation, Meta offers benefits. Learn more about benefits at Meta.