Senior Staff Security Researcher- Mac/IOS, Reverse Engineering

7 days ago

Bangalore IND, India Zscaler Full time ₹ 12,00,000 - ₹ 36,00,000 per year

Our Engineering team built the world's largest cloud security platform from the ground up, and we keep building. With more than 100 patents and big plans for enhancing services and increasing our global footprint, the team has made us and our multitenant architecture today's cloud security leader, with more than 15 million users in 185 countries. Bring your vision and passion to our team of cloud architects, software engineers, security experts, and more who are enabling organizations worldwide to harness speed and agility with a cloud-first strategy.

We're looking for an experienced Senior Staff Security Researcher to join our Threatlabz team to contribute as Security Researcher, Reporting to the Senior Manager,Threat Research. You'll be responsible for:

  • Performing static and dynamic analysis of macOS and iOS applications, firmware, and system internals to identify vulnerabilities and malicious functionality
  • Reverse-engineering and Malware Analyst malware samples to understand their behaviour, capabilities, and attack vectors, contributing to the development of detection and prevention strategies
  • Researching and stay current with the latest macOS security features, kernel updates (XNU), frameworks (e.g., Endpoint Security, Network Extensions), and common malware techniques
  • Developing custom tools and scripts to aid in reverse engineering, binary analysis, and automation of malware related tasks
  • Collaborating with engineering, QA, and threat intelligence teams to integrate new security features and improve product defences

What We're Looking for (Minimum Qualifications)

  • Proficiency in system-level languages such as C, C , Objective-C, Swift, and Assembly language (x86_64 and ARM64)
  • Deep knowledge of macOS architecture, including the Mach-O binary format, frameworks (Cocoa, AppKit), and security mechanisms like System Integrity Protection (SIP), Transparency, Consent, and Control (TCC), and Gatekeeper
  • Extensive hands-on experience with industry-standard reverse engineering tools, such as - IDA Pro, Ghidra, Hopper, Binary Ninja, Frida, Cycript, otool, nm, lipo, Wireshark, hex editors
  • Strong scripting skills, particularly in Python, for automating analysis tasks
  • Decompile, disassemble, and de-obfuscate closed-source binaries to reconstruct and understand the code's logic without access to the source code

What Will Make You Stand Out (Preferred Qualifications)

  • Experience with other platforms, such as Windows or Linux, for comparative analysis
  • Prior experience in malware analysis or vulnerability research
  • Understanding of network protocols and system-level communication mechanisms

#LI-Hybrid

#LI-PM5

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