Question
Full-time
5-10

Senior Security Researcher

11/17/2025

Lead and execute comprehensive penetration tests targeting complex web applications and enterprise systems. Engage in sophisticated Red Team projects and contribute to the design and maintenance of internal security tools.

Working Hours

40 hours/week

Company Size

201-500 employees

Language

English

Visa Sponsorship

No

About The Company
ActiveFence is the leading provider of AI security and safety solutions, protecting online experiences and AI applications for over 3 billion users, top foundation models, and the world’s largest enterprises and tech platforms. As a trusted partner to major technology companies and Fortune 500 brands, we secure user-generated and GenAI products against prompt injection, adversarial attacks, and harmful content through Real-Time Guardrails, continuous Red Teaming, and the industry’s most advanced threat intelligence. With unmatched detection capabilities in 117+ languages, ActiveFence empowers organizations to deliver engaging, safe, and trustworthy experiences globally, helping them innovate responsibly while staying ahead of emerging threats.
About the Role

The Position:

We are seeking a highly motivated and technically proficient Senior Security Researcher to join our security research division. This role is dedicated to performing advanced offensive security assessments against the biggest companies in the world

You need to be independent, attentive to details, organized, eager to learn new things, and like to research and solve problems

What you’ll do:

  • Engage in sophisticated Red Team projects, including the identification of undisclosed API endpoints and development of novel bypass techniques for established security controls
  • Lead and execute comprehensive, technically rigorous security research targeting complex web and mobile applications including reverse engineering and proprietary protocols investigation



Requirements

Must have:

  • Minimum of 3 years of proven, hands-on experience in application security analysis and Web penetration testing
  • Strong experience with reverse engineering and dynamic analysis of Android and iOS applications, including hands-on experience with techniques like detours, hooking, and runtime code manipulation
  • Proficiency in developing and automating tasks using at least one language like Python, JavaScript, or GoLang.
  • Deep, hands-on knowledge of the latest tactics, techniques, and procedures (TTPs) used in advanced penetration testing and network analysis.
  • Ability to author comprehensive and technically rigorous reports detailing identified vulnerabilities and research outcomes.

Nice to have:

  • OSCP, OSWE, eWPTXv2, CRTP, or other high-level offensive certifications.
  • Hands-on experience with industry-standard reversing tools like JADX, Ghidra, or IDA Pro.
  • Demonstrated online achievements, write-ups, or contributions on platforms such as HackTheBox, Pwn2Own, TryHackMe, Bug Bounty programs, or published security research.



About ActiveFence

Alice is a trust, safety, and security company built for the AI era. We safeguard the communicative technologies people use to create, collaborate, and interact—whether with each other or with machines.

In a world where AI has fundamentally changed the nature of risk, Alice provides end-to-end coverage across the entire AI lifecycle. We support frontier model labs, enterprises, and UGC platforms with a comprehensive suite of solutions: from model hardening evaluations and pre-deployment red-teaming to runtime guardrails and ongoing drift detection.



Key Skills
Penetration TestingApplication SecurityAPI TestingPythonJavaScriptGoLangStatic AnalysisDynamic AnalysisAndroidiOSVulnerability ReportingRed TeamingSecurity ToolsThreat IntelligenceRuntime Code ManipulationBypass Techniques
Categories
TechnologySecurity & SafetyEngineeringData & AnalyticsConsulting
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