Staff Software Engineer - Site Defense

Remote - United Statesfull timeRemote

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senior

$217k–$304k

H1B: yes

Reddit Staff Software Engineer on Reddit's Site Defense team responsible for building and operating infrastructure to protect Reddit from DDoS attacks and automated abuse. This role involves designing high-scale, low-latency systems and contributing to ML initiatives for traffic classification and bot detection.

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
Mentor junior engineers in their professional growth.
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
Participate in incident response and post-incident analysis for large-scale network or abuse events

Qualification

Experience with DDoS mitigation

Required

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, C++.
Excellent communication skills to collaborate with a service-oriented team and company.
Experience building and maintaining distributed, fault-tolerant distributed systems at scale
Experience with networking fundamentals (HTTP, TLS, TCP/IP, proxies, CDNs, load balancing).

Preferred

Experience with DDoS mitigation, WAFs, bot management, or abuse prevention systems.
Experience with anti-abuse frameworks and bot scores (ReCaptcha, Datadome, Turnstile)
Experience with browser fingerprinting frameworks (fingerprintJS, ThumbmarkJS)
Familiarity with ML systems in production, especially real-time inference or feature pipelines.

Benefits

Dental
Vision
401(k)
Equity/RSU
Parental Leave
Wellness

Company

Reddit

View company page

1001-5000 employees

Social Media

Founded 2005

Source: greenhouse

Active within the past hour

Remote-friendly

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