Security Researcher

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About SquareX

SquareX is a leading cybersecurity company that focuses on providing robust protection to users while ensuring their productivity remains unhampered. Our mission is to secure the internet for everyone, making our services invaluable to clients worldwide. 

Security Researcher

Responsibilities

• Research and analyze browser-based vulnerabilities, exploits, and attack vectors across major browsers and platforms.
• Investigate and reproduce complex security issues such as sandbox escapes, memory corruption, privilege escalation, and logic flaws in web technologies.
• Study evolving threat landscapes in browser and web security, identifying new patterns of exploitation and abuse.
• Collaborate with product and engineering teams to strengthen browser isolation, threat detection, and mitigation capabilities.
• Design and execute experiments to assess and improve the resilience of browser-based systems against emerging threats.
• Write detailed, technically sound reports describing findings, methodologies, and recommended mitigations.
• Track security advisories, vulnerability disclosures, and emerging research from the broader security community.
• Contribute to improving internal testing and analysis frameworks for browser threat detection.
• Present research and insights internally and occasionally to the wider security community.

Qualifications

• 3–5 years of professional experience

  in security research, vulnerability analysis, or exploit development, with a focus on browsers or web technologies.
• Strong understanding of:

-- Browser architectures and components (rendering engines, JavaScript engines, sandboxing, IPC mechanisms).

-- Web and browser security fundamentals (XSS, CSRF, CORS, clickjacking, same-origin policy, etc.).

-- Common vulnerability types and exploitation techniques relevant to browsers.

-- Familiarity with operating system and process-level security concepts such as sandboxing, isolation, and privilege boundaries.

• Deep curiosity about how modern browsers are attacked and defended.
• Strong analytical and problem-solving skills, with the ability to clearly communicate complex findings.
• Ability to work independently and collaboratively in a fast-paced research environment.
• Commitment to advancing user protection and raising the bar for browser security.