Security Researcher

This is a fully remote position, open to applicants in Ukraine.

📋 Description

• Conduct research on browser, WebView, Android, and iOS environments from the perspective of an attacker.

• Discover new security indicators, behavioral signals, and technical patterns aimed at enhancing detection of fraud, abuse, automation, and AI agents.

• Analyze techniques employed by attackers using bots, browser automation, AI agents, emulators, device spoofing, hooking, instrumentation, remote access tools, and anti-detection strategies.

• Design and execute experiments to compare legitimate, automated, AI-assisted, and manipulated environments.

• Assess signals for their reliability, stability, spoofability, privacy sensitivity, performance impact, and feasibility for production.

• Convert research outcomes into clear SDK feature specifications for web and mobile data collection.

• Develop internal tools, scripts, and laboratory environments for signal research and validation.

• Work collaboratively with SDK, engineering, product, and detection teams to transition research from theory to production.

⛳️ Requirements

• A minimum of 3 years of hands-on experience in security research, mobile security, browser research, fraud detection, reverse engineering, or a comparable technical position.

• Proficiency with web browsers, mobile browsers, WebViews, browser APIs, JavaScript runtime behavior, browser automation, fingerprinting, client-side web security, and low-level browser technologies.

• Familiarity with the architecture or codebase of contemporary open-source browsers and rendering engines like Chromium, WebKit, Blink, or Gecko.

• Experience with native Android and/or iOS applications, mobile OS behavior, app instrumentation, emulators, device spoofing, mobile automation, mobile security, and low-level platform APIs.

• A solid understanding of attacker techniques related to automation, AI agents, spoofing, and anti-detection methods.

• Capability to identify subtle technical signals and translate them into actionable detection or data collection strategies.

• Experience in designing technical experiments and validating research hypotheses.

• Familiarity with SDK development languages and environments, including TypeScript/JavaScript, Kotlin/Java, or Swift/Objective-C.

• Proficiency in scripting, preferably using Python.

• Ability to work independently on ambiguous issues and convey findings effectively.

• A Bachelor’s degree in Computer Science, Cybersecurity, Data Science, or a related field is beneficial, or equivalent hands-on experience.

• Preferred experience with Web SDKs, Mobile SDKs, client-side telemetry, device intelligence, behavioral signals, AI agent detection, or fraud detection products.

• Preferred experience in researching bots, credential stuffing, scraping, headless browsers, AI-assisted automation, app cloning, SDK abuse, phishing kits, malware, or anti-detection frameworks.

• Experience in reverse engineering Android or iOS applications is a plus.

• Familiarity with detection quality measurement, feature evaluation, false-positive analysis, production monitoring, or concepts in machine learning is advantageous.

🏝️ Benefits

• Security: Thoroughly vetted clients to reduce risks while ensuring reliability and timely payments.

• Career assistance and support in finding new opportunities.

• Legal aid concerning independent contractor or sole proprietorship status, taxes, and related processes.

• English language courses.

• Opportunities for professional development.

• Team-building events.

• People-centric management with minimal bureaucracy.

• A friendly company culture.

• Flexible working hours.

• Comprehensive financial and legal support for independent contractors.

• Free English classes with native speakers or Ukrainian instructors.

• Dedicated HR support.