Firecrawl is the web data API to search, scrape, and interact with the web at scale. Turn any source into clean Markdown or structured data your agents can ship with. Backed by Y Combinator.
About the role
Reverse engineer detection: Research how modern websites detect and challenge automated traffic, and take apart those mechanisms and challenge flows Find the signals: Identify the browser, device, network, and behavioral signals that separate automated access from human traffic
What they're looking for
- Languages: Strong JavaScript/TypeScript and/or Python, and comfortable picking up whatever a problem demands
- Browser internals: Real understanding of rendering, JS engines, headless automation (CDP, Playwright, Puppeteer), and where automated browsers differ from real ones
- Network fundamentals: Solid grasp of HTTP/TLS, proxies, and browser and device fingerprinting
- Reverse-engineering instincts: You can read minified, obfuscated code and figure out what it's actually checking
- Research with a shipping habit: You go deep on how something works, then land the fix in production, not just a writeup
- Nice to have: Deobfuscating JavaScript and VM-based obfuscation, network-level fingerprinting (TLS/HTTP2 signatures, JA3/JA4), running large browser or proxy fleets in production, or prior work at a scraping, web data, security research, or automation company
More about this role
You'll keep Firecrawl connected to the open web. Every product we ship depends on reliably accessing pages at web scale, and the modern web actively resists automation with detection systems, challenge flows, and fingerprinting that evolve weekly. This role is equal parts research and engineering: understand how those systems work at the deepest level, then turn that understanding into infrastructure that keeps our scraping fast, reliable, and resilient. If you like taking apart obfuscated JavaScript on a Tuesday and shipping the fix to production on Wednesday, this is for you.
Equity Range: Competitive equity. Details shared during the process.
Job Type: Full-Time
Experience: 3+ years building browser automation, web infrastructure, or systems-level software
Work Authorization: Must be authorized to work in the United States or Canada. We're not able to sponsor US visas right now. For Canada, we'll consider sponsorship on a case-by-case basis through our Toronto Hub.
Firecrawl is the easiest way to turn the web into data AI agents can use. One API call converts any URL into clean, LLM-ready markdown or structured data. It's the boring-hard problem everyone building with LLMs...
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