Reddit, Inc. · 4 hours ago
Senior Software Engineer, Site Defense
United States
Full-time
Remote
Senior Level
$191K/yr - $267K/yr
5+ years expReddit is a community of communities, known for its open and authentic conversations on the internet. The company is seeking a Senior Software Engineer to join the Site Defense team, responsible for protecting Reddit from various network-level threats including DDoS attacks and automated abuse. This role involves designing and operating critical infrastructure to ensure Reddit's availability and performance while mentoring junior engineers and collaborating with security and infrastructure teams.
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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
Required
5+ 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 with DDoS mitigation, WAFs, bot management, or abuse prevention systems
Experience with networking fundamentals (HTTP, TLS, TCP/IP, proxies, CDNs, load balancing)
Preferred
Prior experience with cloud infrastructure systems (Kubernetes, AWS / GCE ecosystems)
Familiarity with ML systems in production, especially real-time inference or feature pipelines
Knowledge of traffic analysis, anomaly detection, or large-scale telemetry systems
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
Company
Reddit, Inc.
Reddit is the heart of the internet, where millions of people get together to talk about any topic imaginable.
1001-5000 employees
H1B Sponsorship
Reddit, Inc. has a track record of offering H1B sponsorships. Please note that this does not
guarantee sponsorship for this specific role. Below presents additional info for your
reference. (Data Powered by US Department of Labor)
Distribution of Different Job Fields Receiving Sponsorship
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Trends of Total Sponsorships
2025 (99)
2024 (63)
2023 (76)
2022 (70)
2021 (68)
2020 (39)
Funding
Current Stage
Public CompanyTotal Funding
$1.33BKey Investors
FidelityVy CapitalTencent
2024-03-21IPO
2021-08-12Series F· $410M
2021-02-08Series E· $367.95M
Leadership Team
Steve Huffman
CEO
Chris Slowe
CTO
Recent News
2026-01-14
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2026-01-11
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