Senior Security Researcher – Web Threats

GeoEdge

. Hunt for and investigate new malvertising campaigns, scams and evasion techniques across the ad supply chain .

Posted 11/5/2026full-timeRemote • IsraelSeniorWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates expertise in threat research and malware analysis, with strong capabilities in JavaScript deobfuscation and automation using Python. Proficient in web security principles and able to communicate findings effectively through written reports.

Highest-signal resume keywords

Threat ResearchMalware AnalysisJavaScript DeobfuscationPython ScriptingWeb Security Knowledge

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

Threat ResearchMalware AnalysisDetection EngineeringJavaScriptHTTP/HTTPSScriptingData AnalysisAutomationReverse EngineeringEvasion Techniques

Soft Skills

Clear Written Communication

Tools & Technologies

Browser Dev ToolsProxiesSandboxesLLM WorkflowsAgent-Based Workflows

Industry Keywords

MalvertisingAd Supply ChainThreat HuntingDetection LogicAttack Infrastructure

Tech Stack

Tools & technologies

JavaScriptPython

About the role

Key responsibilities & impact

Hunt for and investigate new malvertising campaigns, scams and evasion techniques across the ad supply chain
Reverse-engineer malicious ad creatives, JavaScript and landing pages to understand how they target users and avoid detection
Turn research findings into detection logic, signatures and data signals, working with R&D and Data Science to ship them to production
Build tools and automation, including LLM- and agent-based workflows, to speed up research and threat hunting
Track attacker infrastructure and campaigns over time, and measure detection precision and coverage
Write threat reports and blog posts, and help present GeoEdge research externally
Support Customer Success on escalations with technical analysis of specific incidents

Requirements

What you’ll need

Hands-on experience in threat research, malware analysis or detection engineering, with examples of attacks investigated end to end
Strong web security knowledge: JavaScript, browsers, DOM, HTTP/HTTPS and redirect chains
Ability to read and deobfuscate malicious JavaScript and analyze it with browser dev tools, proxies and sandboxes
Scripting skills in Python (or similar) to automate analysis and work with large datasets
Understanding of attacker evasion techniques, including cloaking, fingerprinting and obfuscation
Clear written English sufficient to write threat reports for customers and technical write-ups for engineers

Benefits

Comp & perks

No benefits, perks, or compensation extras are specified in the posting