System Engineer (Behavioral Analysis)

Join Cloudflare, a leading internet security and performance company. As a System Engineer in the UEBA team, you will build and operate production services that analyze user and entity behavior to enhance security. You will work on projects related to behavioral detections, risk understanding, infrastructure design, and collaboration across teams. Enjoy competitive pay, flexible vacation, paid parental leave, comprehensive benefits, and a supportive work environment.

Responsibilities

• Construire et exploiter des services de production dans le pipeline d'analyse comportementale, y compris la mise en œuvre de détections pour des modèles inhabituels.
• Collaborer avec les équipes produit et d'ingénierie pour transformer les exigences du produit et la télémétrie disponible en détections prêtes pour la production.
• Participer aux revues d'architecture, à la planification de la capacité et à la surveillance proactive de la santé du système pour garantir un maximum de disponibilité et de résilience.

Requirements

• Clear written and verbal communication, and an ability to work through technical decisions with product and engineering partners
• 3+ years of practical experience with databases and data-intensive services—for example, PostgreSQL, ClickHouse, or comparable relational or analytical stores
• Experience using metrics, logs, traces, profiling, and experiments to understand production behavior and validate improvements
• Strong proficiency in at least one systems programming language (e.g., Go, Rust, C/C++) with a track record of writing clean, maintainable code
• Experience reasoning about event-driven systems: message delivery, duplicate or late events, state, failure recovery, and safe changes to live consumers or APIs
• 3+ years of professional experience building, testing, and operating backend or distributed systems in production
• Bring strong opinions, clear judgment, and a willingness to revise your view when data, users, or production reality prove otherwise
• Experience with security analytics, fraud or abuse detection, identity, Zero Trust, SASE, or network telemetry
• Familiarity with Kafka or other streaming systems; Kubernetes; and high-volume event processing
• Familiarity with DNS, HTTP, authentication events, data-loss-prevention signals, or endpoint-security integrations
• Experience with distributed state, caches, object storage, or safe migration of a legacy production service

Preferred

• Experience with statistical baselines, anomaly detection, time-windowed aggregation, or evaluating false positives and detection coverage

Pay

USD 136,000 - 206,000