Deep experience with Playwright, Puppeteer, or Selenium internals Understanding of browser fingerprinting techniques and how to spoof them Experience bypassing at least one major anti-bot system (Cloudflare, Akamai, DataDome, PerimeterX, etc.) Network traffic analysis (Wireshark, Burp Suite, mitmproxy, or similar) TLS fingerprinting experience (JA3, JA4, HTTP/2) WebRTC fingerprinting and evasion Chromium or Firefox source code familiarity Experience at scale handling millions of requests Contributions to open-source evasion tools