What this interview will probe
Build the systems on Vercel's global edge network that detect malicious traffic and protect customers, including the scalable firewall and DDoS-mitigation layers that analyze requests at the CDN tier. The role mixes high-throughput, low-latency edge engineering with adversarial threat modeling. A technical interview would dig into HTTP and TCP/IP fundamentals, designing rate-limiting and rule-matching engines that run at edge scale, and reasoning about attacker behavior and false-positive tradeoffs.
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