Staff Software Engineer – Site Defense
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Job Description
Staff Software Engineer designing distributed defenses for Reddit, a community discussion platform. Protecting internet-scale traffic from DDoS attacks, bots, scraping, and automated abuse.
Responsibilities:
- Design, build, and operate high-scale, low-latency systems protecting Reddit from DDoS attacks, bots, and automated abuse
- Analyze, develop, and evolve ingress-level defenses across CDN, edge, and internal infrastructure layers
- Build real-time systems to detect, score, and mitigate malicious traffic at per-request and per-user granularity
- Partner with Infrastructure, Security, and internal Safety teams to balance security, performance, and user experience
- Mentor junior engineers
- Contribute to ML-at-Ingress initiatives, including models for traffic classification, bot detection, and anomaly detection
- Own services end-to-end, including design, implementation, on-call, and operational excellence
- Participate in incident response and post-incident analysis for large-scale network or abuse events
Requirements:
- 7+ years of experience building and operating high throughput and low latency production distributed systems
- Software development experience in one or more general purpose programming languages: Python, Go, Rust, Java, or C++
- Excellent communication skills to collaborate with a service-oriented team and company
- Experience with DDoS mitigation, WAFs, bot management, or abuse prevention systems
- Experience with networking fundamentals: HTTP, TLS, TCP/IP, proxies, CDNs, and load balancing
Benefits:
- Comprehensive Healthcare Benefits and Income Replacement Programs
- 401k with Employer Match
- Global Benefit programs that fit your lifestyle, from workspace to professional development to caregiving support
- Family Planning Support
- Gender-Affirming Care
- Mental Health & Coaching Benefits
- Flexible Vacation & Paid Volunteer Time Off
- Generous Paid Parental Leave
- Equity in the form of restricted stock units
- Medical, dental, and vision insurance
- Generous time off for vacation and parental leave
- Opportunity to opt out of interview recording, transcription, and summarization
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