Staff Software Engineer - Site Defense

Responsibilities

• Design, build, and operate high-scale, low-latency systems that protect Reddit from DDoS attacks, bots, and automated abuse.
• Analyze, develop and evolve ingress-level defenses across CDN, edge, and internal infrastructure layers.
• Build systems to detect, score, and mitigate malicious traffic in real time at per-request and per-user granularity
• Partner closely within Infrastructure and with Security, and internal Safety teams to balance security, performance, and user experience
• Contribute to the team’s ML-at-Ingress initiatives, including experimenting with models for traffic classification, bot detection, and anomaly detection
• Own services end-to-end, including design, implementation, on-call, and operational excellence

Languages