Remote Browser Security Researcher

CENSUS SA; United States; Remoto; USD 140.000 - 210.000; Tempo pieno

Vantaggi offerti da questo lavoro

Birthday Paid Day off

Private Medical and Life Insurance

Funded certifications & postgraduate

Recognition programs

Descrizione del lavoro

CENSUS is seeking a Vulnerability Researcher specializing in modern web browsers and browser exploitation. You will identify, analyze, and demonstrate security vulnerabilities in rendering engines, JavaScript engines, IPC systems, sandboxing, and platform integrations.

The role requires auditing large C/C++ codebases, reverse engineering browser components, and developing PoCs and exploits. Strong knowledge of memory management, OS internals, and debugging tools is essential.

Competenze

• Strong knowledge of C/C++ and x64/aarch64 assembly.
• Excellent understanding of memory management, pointers, object lifetime, and concurrency.
• Strong knowledge of operating-system internals, particulary Android and iOS.
• Experience with reverse engineering tools such as IDA Pro, Ghidra, Binary Ninja, or similar.
• Familiarity with browser architecture and multi-process sandbox designs.
• Experience analyzing large codebases.
• Knowledge of common memory-corruption vulnerability classes and exploitation techniques.
• Familiarity with debugging and sanitization tools such as ASan, UBSan, WinDbg, GDB, or LLDB.
• Ability to independently investigate complex technical problems and document findings clearly.

Mansioni

• Research security vulnerabilities in modern browsers such as Firefox, Chromium-based and WebKit-based browsers.
• Perform source-code auditing of large C/C++ codebases to identify memory-safety, logic, sandbox, and privilege-boundary vulnerabilities.
• Investigate JavaScript engine internals such as V8, SpiderMonkey, or JavaScriptCore.
• Analyze browser sandbox boundaries and investigate sandbox escape vulnerabilities.
• Reverse engineer browser binaries and security-relevant operating-system components.
• Debug crashes and memory-corruption issues using tools such as WinDbg, GDB, LLDB, AddressSanitizer, and related tooling.
• Develop fuzzers, harnesses, and automation for vulnerability discovery.
• Study exploit mitigations such as ASLR, DEP/NX, Control Flow Guard, CET, CFI, MTE/MIE, pointer authentication, and sandboxing.
• Develop proof-of-concept exploits to validate vulnerabilities and understand their practical impact.
• Produce clear technical reports describing vulnerability root cause, exploitability and affected components.

Conoscenze

C/C++

x64/aarch64 assembly

Memory management

OS internals

Reverse engineering

Browser architecture

Large codebases

Debugging tools

Fuzzing

Strumenti

IDA Pro

Ghidra

Binary Ninja

WinDbg

GDB

LLDB

Descrizione del lavoro

CENSUS is seeking a Vulnerability Researcher specializing in modern web browsers and browser exploitation. You will identify, analyze, and demonstrate security vulnerabilities in rendering engines, JavaScript engines, IPC systems, sandboxing, and platform integrations.

The role requires auditing large C/C++ codebases, reverse engineering browser components, and developing PoCs and exploits. Strong knowledge of memory management, OS internals, and debugging tools is essential.