This position is listed on behalf of a partner company, who manages all applications and next steps. Our partner is looking for a Staff Security Researcher based in Spain. This role is designed for a hands-on offensive security researcher who can turn advanced vulnerability and malware research into production-ready detection capabilities. You will investigate emerging threats across web applications, APIs, cloud-native environments, and AI-powered systems, translating discoveries into accurate security checks with low false-positive rates.
The position combines deep technical research with practical engineering, from exploit proof-of-concepts to detection rules, evaluation frameworks, and attack-chain methodologies. You will also contribute to research standards, security tooling, and the broader application security community through publications and technical contributions. Working across engineering, product, AI/ML, and infrastructure teams, you will help ensure research moves efficiently from discovery to production.




The role offers a high degree of ownership in a fast-evolving security environment where technical curiosity and measurable detection quality are highly valued. Accountabilities Create and maintain detection rules, primarily using Open Grep, to identify novel malware and vulnerability patterns and improve detection accuracy. Extend security analysis capabilities to support additional programming languages across the analysis pipeline.
Research emerging vulnerabilities, exploitation techniques, cloud-native attack paths, and AI-specific threats, translating findings into production-ready detections. Investigate modern web applications and APIs, develop proof-of-concept attacks, and convert research findings into deployable security capabilities. Develop attack-chain templates that connect lower-severity findings into meaningful exploitation paths.
Design and maintain evaluation harnesses, testing frameworks, and benchmarks to measure coverage, accur

📌 Staff security researcher (Cantabria)
🏢 Lever
📍 Cantabria