10 hours ago
Toronto, Canada or San Francisco, CA, USAMid Level
Base Salary
$235k - $260k/yr
Responsibilities
- Research and reverse-engineer website automation detection systems and challenge flows.
- Identify browser, device, network, and behavioral signals used to distinguish automated access from human traffic.
- Replicate signals in authorized test environments and harden scraping approaches.
- Build production automation, diagnostic, and monitoring tools for reliable web scraping.
- Measure scrape success rates, investigate regressions, and ship fixes.
- Collaborate with platform engineers to deploy improvements across the crawling fleet at scale.
Requirements
- 3+ years building browser automation, web infrastructure, or systems-level software.
- Strong JavaScript/TypeScript and/or Python skills, with the ability to learn additional technologies as needed.
- Deep understanding of rendering, JavaScript engines, headless automation, CDP, Playwright, Puppeteer, and differences between automated and real browsers.
- Solid knowledge of HTTP, TLS, proxies, browser fingerprinting, and device fingerprinting.
- Ability to read and analyze minified or obfuscated JavaScript and determine what it checks.
- Ability to conduct deep technical research and turn findings into production fixes.
- Preferred experience with JavaScript and VM-based deobfuscation, TLS/HTTP2 fingerprinting including JA3/JA4, large browser or proxy fleets, or scraping, web data, security research, or automation companies.
Benefits
- Competitive equity and generous paid time off, including 15 mandatory PTO days and additional PTO after 24 days.
- 12 weeks of fully paid parental leave, a $100 USD monthly wellness stipend, and up to $1,000 USD annually for learning and development.
- Paid team offsites and a three-month paid sabbatical after four years.
- US employees receive medical, dental, vision, life, disability, mental-health, fertility, retirement, and pre-tax benefits.
- Canada employees receive employer-paid extended health, dental, vision, life, disability, mental-health, fertility, and Group RRSP benefits.
- San Francisco and Toronto employees receive location-specific office perks and transportation benefits.
- Full-time, on-site five days per week in San Francisco or Toronto; the interview includes a paid approximately 40-hour work trial that is remote-friendly.
Tech Stack
Categories
About Firecrawl
Firecrawl builds a web data API that lets developers convert URLs into LLM-ready markdown or structured data with a single call for AI products. It sells a usage-based SaaS/API adopted for data extraction, crawling, and in-product features by teams building agents, search, and automation. The company is privately held and operates in the AI, developer API, and web development markets.