Overview
As a Senior Security Research Engineer on SONAR, you take on hard, uncharted malware analysis to drive defenses for Elastic Security customers. You reverse engineer samples across Windows, macOS, and Linux, surface campaigns from millions of endpoints, and ship protections and scalable tooling. You publish findings and contribute to public research, while mentoring others and shaping our technical direction. This role offers impact through public research, cross-team collaboration, and contributions to defense-at-scale.
Compensaciones / Ventajas competitive pay
health coverage for you and family
flexible locations and schedules
generous vacation days
donation matching up to $2000
volunteer time off (up to 40 hours/year)
Responsabilidades Reverse engineer previously undocumented malware across Windows, macOS, and Linux, uncovering communication, configuration, and persistence mechanisms
Analyze telemetry from millions of endpoints to identify threats and build campaign context for customers




Convert discoveries into protections; author detection signatures and build automation/AI-assisted workflows
Publish research publicly and share tooling/detection artifacts; present at conferences
Collaborate with other Elastic Security teams on threat intelligence and detection engineering projects
Help lead the teams technical direction; mentor junior researchers and drive long-running investigations
Requisitos principales 6+ years of professional experience reverse engineering malware and researching adversary tradecraft across PE, ELF, Mach-O formats and x86-64/ARM architectures
Python development for research tooling; ability to read C/C++; willingness to learn Rust/Go/NodeJS as needed
YARA authorship and scalable hunting; capable of identifying weak signals in large telemetry datasets
Strong fundamentals in Windows/Linux internals, network protocols (HTTP/TLS), and applied cryptography
Technical writing ability to produce clear, public analyses
Proven track record

📌 Senior Security Research Engineer, SONAR (Barcelona)
🏢 Elastic
📍 Barcelona