Senior Web Browser Researcher

This position is listed on behalf of a partner company, who manages all applications and next steps. Our partner is looking for a Senior Web Browser Researcher based in Spain. Join a fully remote, globally distributed team developing advanced device intelligence and fraud-detection technology. As a Senior Web Browser Researcher, you will investigate browser behavior, discover novel identification techniques, and improve the accuracy and stability of core products. You will lead research from initial hypothesis through validation and engineering implementation, turning complex technical discoveries into measurable product improvements. Working at the intersection of JavaScript, browser internals, web security, and networking, you will tackle open-ended challenges that require rigorous experimentation and reverse engineering. You will also develop automated research tools, anticipate browser platform changes, and collaborate closely with product and engineering teams. This role offers the opportunity to shape cutting-edge technology, mentor peers, and contribute to the broader research community.