Sergiy Usatyuk

Software, network and infrastructure engineer.

I'm Rasbora, a fully self taught computer whiz. I do interesting things online and occasionally blog about them.

Founder @ Layer3 Intel

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Sergiy Usatyuk

Recent posts

09/03/2022I ran the worlds largest DDoS-for-Hire empire and CloudFlare helpedThe perils of remaining neutral on a global scale: fanning the flames and selling the extinguisher.11/23/2021Detecting Residential Proxy NetworksUncovering the hidden networks powering nefarious activity on the internet.
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Some of my passions

  • Linux
  • Web Servers
  • Fast per-packet applications built with kernel bypass frameworks (DPDK, PF_RING, XDP)
  • Packet Capture Analysis
  • Architecting Networks (Cisco, Juniper, Linux)
  • Designing fault tolerant, highly performant distributed systems
  • Storing and querying data at scale (relational, OLAP, in-memory)
  • Building agentic harnesses
  • Burning tokens to disrupt billion-dollar industries
  • Writing code (JS, Java, Go, C, PHP)
  • Creating frontend web apps in React (Next.js)
  • Cyber Security
  • Bypassing and creating anti-bot measures
  • Entrepreneurship
  • Listening to Eminem
  • Playing Call of Duty, Apex Legends, Rocket League, Minecraft, etc...