Anti-Bot Engineer
Role details
Job location
Tech stack
Job description
- Ruby, Node.js, or Python for tooling
- Browser internals (Chromium, Firefox)
- Network analysis tools (Wireshark, Burp Suite, Proxyman)
- AWS infrastructure
- Ruby on Rails familiarity is a plus (we use it for internal tools)
We use Cursor, Claude, ChatGPT, GitHub, and Slack daily. We ship multiple times a day with CI/CD.
You Control AI, AI Doesn't Control You
We ship faster because we use AI tools aggressively. Cursor and Claude. But you own the output. If you can't evaluate what AI produces, you're not ready for this role.
What You'll Do
- Research and implement anti-bot evasion techniques.
- Reverse engineer bot detection systems. Understand how they work, then bypass them.
- Work with browser fingerprinting: canvas, WebGL, audio, fonts, navigator properties, and more.
- Debug TLS and protocol fingerprinting (JA3, JA4, HTTP/2, HTTP/3 over QUIC, header order and casing), and push the QUIC frontier where most detection and most scrapers haven't caught up yet.
- Optimize Playwright/Puppeteer configurations for stealth.
- Analyze network traffic to understand detection mechanisms.
- Build internal tools for testing and validating evasion techniques.
- Stay ahead of the latest developments in bot detection.
- Document findings and share knowledge with the team.
You define the work. We don't have a task list for this role. You tell us what you'll work on based on what's broken, what's getting detected, and where you see opportunities. This is how much control you'll have., * Ambiguity. Anti-bot systems don't publish their detection methods. You reverse engineer and experiment.
- Pressure. When a major protection changes and customers are affected, you need to fix it fast.
- Lonely expertise. Few people understand this domain deeply. You'll often be figuring things out alone.
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What you need to know about the Colorado Tech Scene
With a business-friendly climate and research universities like CU Boulder and Colorado State, Colorado has made a name for itself as a startup ecosystem. The state boasts a skilled workforce and high quality of life thanks to its affordable housing, vibrant cultural scene and unparalleled opportunities for outdoor recreation. Colorado is also home to the National Renewable Energy Laboratory, helping cement its status as a hub for renewable energy innovation.
Key Facts About Colorado Tech
- Number of Tech Workers: 260,000; 8.5% of overall workforce (2024 CompTIA survey)
- Major Tech Employers: Lockheed Martin, Century Link, Comcast, BAE Systems, Level 3
- Key Industries: Software, artificial intelligence, aerospace, e-commerce, fintech, healthtech
- Funding Landscape: $4.9 billion in VC funding in 2024 (Pitchbook)
- Notable Investors: Access Venture Partners, Ridgeline Ventures, Techstars, Blackhorn Ventures
- Research Centers and Universities: Colorado School of Mines, University of Colorado Boulder, University of Denver, Colorado State University, Mesa Laboratory, Space Science Institute, National Center for Atmospheric Research, National Renewable Energy Laboratory, Gottlieb Institute
Requirements
- Obsessed with evasion. You've spent your own time trying to bypass protections. You find it fun.
- Hacker mindset. You enjoy reverse engineering and figuring out how systems work.
- Deep technical skills. Browser internals, networking, fingerprinting. Not surface-level knowledge.
- Persistent. You don't give up when something doesn't work. You try another approach.
- Great writer. You document your findings clearly so others can learn.
- Self-directed. You don't need someone to assign tasks. You find the next problem to solve.
- Fluent in English, written and spoken.
- BSc or higher in CS or equivalent technical field.
Required experience:
- 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 and protocol fingerprinting experience (JA3, JA4, HTTP/2, HTTP/3 over QUIC).
- WebRTC fingerprinting and evasion.
- Chromium or Firefox source code familiarity.
- Experience at scale handling millions of requests.
- Running headless browsers stably at scale in containers, the part most people underestimate.
- Contributions to open-source evasion tools.