Zscaler

Zscaler is a San Jose, CA-based cloud security company that pioneered the zero-trust exchange architecture, routing and inspecting enterprise internet traffic through its global cloud platform rather than traditional on-premises firewalls and VPNs. Their engineering challenges include performing inline SSL/TLS traffic inspection at scale across 150+ data centers without introducing perceptible latency, maintaining real-time threat intelligence feeds that identify malicious domains, URLs, and payloads, implementing zero-trust network access that evaluates user identity, device posture, and application context for every connection, and operating global edge infrastructure that must be closer to users than the applications they access. The platform processes hundreds of billions of transactions daily, requiring sophisticated traffic classification, content inspection, and policy enforcement engines that operate at wire speed. Zscaler's hiring patterns signal demand for network security engineers, distributed systems specialists, and performance engineers working on the architecture that is replacing traditional corporate network perimeters.