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This position is listed on behalf of a partner company, who manages all applications and next steps. Our partner is looking for a Security Researcher - Bot Detection Adversarial Research based in Spain.
This is a highly technical and research-driven role focused on analyzing, simulating, and countering advanced bot detection and anti-automation systems at scale. You will work on the front line of web security and data collection, reverse engineering sophisticated protection mechanisms and developing resilient solutions that ensure reliable access to public web data. The role combines deep protocol expertise, offensive security thinking, and systems-level engineering to improve large-scale data collection infrastructure. You will contribute to building and optimizing HTTP clients, exploring emerging anti-bot technologies, and identifying new patterns that impact collection performance. Operating in a fast-evolving security environment, you will have significant autonomy to shape research direction and technical approaches. This position is ideal for someone who thrives on complex adversarial challenges and cutting-edge web security research.
Accountabilities
- Conduct advanced research on anti-bot systems, web protection technologies, and mechanisms that block large-scale data collection.
- Design, build, and improve HTTP client infrastructure to ensure reliable and efficient web data acquisition at scale.
- Reverse engineer adversarial systems, including fingerprinting techniques and bot mitigation strategies, to identify weaknesses and bypass mechanisms.
- Monitor emerging web standards, protocols, and security technologies that may impact data collection capabilities.
- Develop and refine methods for simulating real-world adversaries against anti-bot systems to evaluate system resilience.
- Contribute to the evolution of large-scale data collection platforms through research-driven engineering improvements.
- Collaborate with engineering and research teams to translate findings into production-ready solutions.
Requirements
- 5+ years of experience in R&D, security research, software engineering, or testing roles in complex technical environments.
- Strong understanding of HTTP and TLS protocols and how they are used and manipulated in real-world systems.
- Experience in at least two of the following areas: programming in JavaScript, TypeScript, Python, or C++; penetration testing or offensive security (e.g., OSCP, OSEP); web or mobile security research; reverse engineering (including JS deobfuscation or binary analysis); malware analysis; or anti-bot/WAF/DDoS system development.
- Hands-on experience with reverse engineering techniques and adversarial system analysis.
- Familiarity with anti-bot technologies, web security tools, or large-scale protection systems is a strong advantage.
- Strong analytical mindset with the ability to break down complex systems and identify weaknesses.
- Fluent English communication skills, both written and verbal.
- Experience working in web security or anti-bot-focused environments is highly desirable.
Benefits
- Competitive compensation aligned with experience and technical expertise.
- Fully remote work environment with global team collaboration.
- Opportunity to work on cutting-edge adversarial security and web-scale systems.
- High level of autonomy and ownership over research direction and technical decisions.
- Exposure to complex, real-world security challenges at massive scale.
- Collaborative and technically strong research and engineering culture.
- Opportunity to directly influence the evolution of large-scale data collection systems.
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