3 months ago
Remote, CroatiaSenior
Responsibilities
- Reverse-engineer antibot and browser-fingerprinting systems across JavaScript VMs, WASM, and polymorphic or obfuscated code.
- Build JavaScript function-tracing, deobfuscation, and fingerprint-inspection tooling to automate reverse-engineering investigations.
- Use LLMs, agents, and custom automation to deobfuscate, classify, and diagnose detection surfaces.
- Build website-intelligence pipelines with checkpointed history and baseline diffing for antibot updates.
- Provide context, signals, and structured intelligence to AI reverse-engineering and ban-resolution systems.
- Turn reverse-engineering discoveries into reusable tools, rules, and pipelines for engineers and AI agents.
- Integrate tooling into the custom browser and automation stack and mentor teammates in AI-augmented reverse engineering.
Requirements
- Demonstrated use of AI tooling, including LLMs, coding agents, or automation, to accelerate engineering work.
- Strong proficiency in JavaScript/Node.js and Python, with broad programming experience and strong problem-solving skills.
- Strong research, debugging, fuzzing, and reverse-engineering skills, including static, dynamic, and concolic analysis.
- Hands-on experience reversing JavaScript VMs, WASM, and heavily obfuscated or polymorphic code.
- Deep understanding of operating systems and computer networking concepts.
- Experience with tools such as Wireshark and Burp Suite for intercepting and debugging network traffic.
- Understanding of browser engines, browser fingerprinting, and antibot or anti-scraping mechanisms.
- Logical, measurement-backed prioritization and ability to work collaboratively.
- Preferred experience with IDA, Ghidra, Frida, or Babel.
- Preferred experience building tooling or pipelines that feed machine-learning or AI systems.
- C/C++ and Rust experience is a bonus.
- Core contributions to Mozilla or Chromium projects are a bonus.
Benefits
- Remote work with flexibility to work from where the employee does their best work.
- Conference attendance and opportunities to meet team members globally.
- Work with cutting-edge open source technologies and tools.
- Full-time position based remotely in Zagreb, Croatia.
About Zyte
Zyte builds SaaS and services for extracting structured data from public websites, including Zyte API for crawling/unblocking/extraction, Smart Proxy Manager, and fully managed data projects for enterprise teams. Its business model combines subscriptions with professional services. Founded in 2010 and headquartered in Ballincollig, Cork, the privately held company is the original author and ongoing maintainer of the Scrapy web-scraping framework.