Reddit

Staff Software Engineer - Site Defense

Reddit
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2 months ago
Remote, United StatesStaff+
H1B sponsor

Base Salary

$217k - $304k/yr

Responsibilities

  • Design, build, and operate high-scale, low-latency systems protecting Reddit from DDoS attacks, bots, and automated abuse.
  • Develop and evolve ingress-level defenses across CDN, edge, and internal infrastructure layers.
  • Build real-time systems that detect, score, and mitigate malicious traffic at per-request and per-user granularity.
  • Collaborate with Infrastructure, Security, and Safety teams to balance security, performance, and user experience.
  • Contribute to ML-at-Ingress initiatives 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 and abuse events.
  • Mentor junior engineers in their professional growth.

Requirements

  • 7+ years of experience building and operating high-throughput, low-latency production distributed systems.
  • Software development experience in one or more general-purpose programming languages, including Python, Go, Rust, Java, or C++.
  • Experience with DDoS mitigation, WAFs, bot management, or abuse prevention systems.
  • Experience with networking fundamentals including HTTP, TLS, TCP/IP, proxies, CDNs, and load balancing.
  • Excellent communication skills for collaboration in a service-oriented team and company.
  • Nice to have experience with anti-abuse frameworks and bot scores such as ReCaptcha, Datadome, or Turnstile.
  • Nice to have experience with browser fingerprinting frameworks such as fingerprintJS or ThumbmarkJS.
  • Familiarity with production ML systems, especially real-time inference or feature pipelines.

Benefits

  • Comprehensive healthcare benefits and income replacement programs.
  • 401(k) with employer match.
  • Global benefits supporting workspace, professional development, and caregiving.
  • Family planning support.
  • Gender-affirming care.
  • Mental health and coaching benefits.
  • Flexible vacation and paid volunteer time off.
  • Generous paid parental leave.
  • Remote position as indicated by the #LI-Remote designation.
  • Eligible for equity in the form of restricted stock units and, depending on the position offered, potentially commission.
  • Base salary range of $217,000–$303,900 USD.
Reddit

About Reddit

5,001-10,000 employees

Reddit builds a social news and discussion platform organized into user-created forums (“subreddits”) for consumers, creators, and communities. It monetizes primarily through advertising tools for brands and self-serve advertisers, plus a Premium subscription; developers can access data via its API. Founded in 2005 and headquartered in San Francisco, Reddit became a public company on the NYSE in 2024 and hosts over 100,000 active communities.

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