Elastic, the Search AI Company, enables everyone to find the answers they need in real time, using all their data, at scale — unleashing the potential of businesses and people. By taking advantage of all structured and unstructured data — securing and protecting private information more effectively — Elastic’s complete, cloud-based solutions for search, security, and observability help organizations deliver on the promise of AI.What is The RoleSONAR is the adversary research team within Elastic Security. We discover novel adversary behavior through malware reverse engineering, threat hunting, and vulnerability research, turn every discovery into protections that ship to customers, and share our work publicly through Elastic Security Labs.

We are looking for a Senior Security Research Engineer to take on our hardest analysis work and help set the technical direction of the team. Our research is public, and much of it is work you may already know: this team identified the supply chain compromise of the axios npm package, uncovered a new Contagious Interview campaign hiding DPRK malware inside SVG images, and published in-depth analyses of the TCLBANKER banking trojan and the PHANTOMPULSE RAT, each one paired with protections that shipped to customers. Take apart obfuscated and packed samples across Windows, macOS, and Linux, and recover how they communicate, configure themselves, and stay hidden.Operate general data systems to identify and mitigate threats.

Work through data from millions of endpoints to surface the activity worth investigating, build the campaign context that tells customers who is targeting them, and push mitigation back out across the fleet.Turn every discovery into a shipped protection, and the tooling that scales it. Build your public research reputation. Publish on Elastic Security Labs,



release tools and detection artifacts to our public GitHub repositories, and present at conferences.

We encourage a public persona and the relationships in the research community that come with it.Collaborate across Elastic Security. Your discoveries become the rules and models that neighboring teams build and ship, and you will work with those teams directly on shared threat intelligence and detection engineering projects.Take point on investigations that run for months, raise the bar in review, and mentor researchers earlier in their careers.What You Bring6+ years of professional experience reverse engineering malware and researching adversary tradecraft, static and dynamic, across multiple executable formats (PE, ELF, Mach-O) and architectures (x86-64, ARM), including obfuscated and packed code that defeats automated tooling.Python development experience for research tooling and automation, plus the ability to read C and C++. Malware arrives in Rust, Go, and NodeJS too, so you are willing to learn a new runtime when a sample demands it.Windows and Linux internals, network protocols including and TLS, and enough applied cryptography to recognize what is protecting a configuration blob.Proven ability to seamlessly transition between different projects, codebases, or scrum teams based on dynamic business priorities.A collaborative mentality, an eagerness to learn new skills and emerging technologies, and a passion for protecting the world's data from attack!Bonus PointsVulnerability research or novel technique discovery,



with a track record of responsible disclosure.Standing in the community: maintaining an open-source security tool, speaking at conferences (e.g., Behavioral detection engineering beyond signatures, or applying machine learning to malware classification.Familiarity with the Elastic Stack (Elasticsearch, Kibana) and Elastic Security.At Elastic, our compensation philosophy aims to provide fair, competitive and transparent remuneration.

It doesn’t matter if you’re just out of college or your children are; Competitive pay based on the work you do here and not your previous salaryHealth coverage for you and your family in many locationsAbility to craft your calendar with flexible locations and schedules for many rolesGenerous number of vacation days each yearIncrease your impact - We match up to $2000 (or local currency equivalent) for financial donations and serviceUp to 40 hours each year to use toward volunteer projects you loveEmbracing parenthood with minimum of 16 weeks of parental leaveDifferent people approach problems differently. Qualified applicants will receive consideration for employment without regard to race, ethnicity, color, religion, sex, pregnancy, sexual orientation, gender perception or identity, national origin, age, marital status, protected veteran status, disability status, or any other basis protected by federal, state or local law, ordinance or regulation.Employee Polygraph Protection Act (EPPA)Poster and Know Your Rights (Poster)Elasticsearch develops and distributes technology and information that is subject to U.Belarus, Cuba, Iran, North Korea, Syria, or Russia, including the Ukrainian territories annexed by Russia (The Crimea region of Ukraine, The Donetsk People's Republic (DNR), The Luhansk People's Republic (LNR), Kherson or Zaporizhzhia).

📌 Senior Security Research Engineer, SONAR (Security Operations and Novel Adversary Research) (Madrid)
🏢 Elastic
📍 Madrid