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Threat Research Engineer (Client Side)

Flex Life: While we offer remote options our Parisian office is located next to 🌐 Remote💼 Full-time🗓 2026-09-29

Core

Develop and improve client-side bot detection mechanisms, including browser fingerprinting and JavaScript obfuscation, to challenge and enhance the company's real-time fraud prevention capabilities.

Role type

Senior IC Threat Research Engineer (Client Side)

Builds

Client-side detection scripts, SDKs for mobile, and automated red teaming tools for bot detection.

Domain

Cybersecurity / Bot Management / Web Security

Deliverable

production ML models

Required skills

JavaScript programming, browser fingerprinting, JavaScript obfuscation, web client technologies, network infrastructure, malware analysis, red teaming, tool automation

Preferred skills

WebAssembly, compilers, cyber security industry experience

Responsibilities

Create tools to automate internal bot detection red teaming; analyze modules and customer configurations to detect bypasses proactively; add new signals to client-side scripts for browser fingerprinting; implement obfuscation techniques to prevent reverse engineering; collaborate with mobile teams to improve SDK detection; share research results via conferences, papers, or blogs.

Seniority

Senior, hands-on IC

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