Browser Vulnerability Researcher

Job not on LinkedIn

🔥 57 minutes ago

🇬🇷 Greece – Remote

⏰ Full Time

🟡 Mid-level

🟠 Senior

✨ Researcher

👻 Ghost score 10%

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CENSUS

WebsiteLinkedInAll Job Openings

51 - 200 employees

💼 Consulting

🏥 Healthcare

🔒 Cybersecurity

Consulting • Healthcare • Cybersecurity

CENSUS is a cybersecurity company that provides in-depth security testing and advisory services. They offer a range of services including Tiger Team and Penetration Testing, comprehensive mobile app testing, and Secure Software Development Lifecycle (SDLC) practices. CENSUS engages in cybersecurity engineering to protect digital assets and infrastructures. They also focus on product and organization security, vulnerability research, and provide advisory services for various digital security challenges. CENSUS is actively involved in the cybersecurity community, participating in notable events like the Cybersecurity Financial Services Summit and the Autotech Europe Forum.

📋 Description

• 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, and 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 WinDbg, GDB, LLDB, AddressSanitizer, and related tooling • Develop fuzzers, harnesses, and automation for vulnerability discovery • Study exploit mitigations including 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

🎯 Requirements

• 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, particularly Android and iOS • Experience with reverse-engineering tools such as IDA Pro, Ghidra, Binary Ninja, or similar • Familiarity with browser architecture and multiprocess 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 • Preferred: experience researching Chrome, Firefox, or Safari • Preferred: experience developing browser exploits or participating in vulnerability disclosure or bug-bounty programs • Preferred: experience with coverage-guided fuzzing tools such as libFuzzer, AFL++, or custom fuzzing frameworks • Preferred: familiarity with modern exploit-development techniques including heap manipulation, arbitrary read/write primitives, information leaks, and control-flow manipulation • Preferred: knowledge of compiler-generated mitigations and browser hardening mechanisms

🏖️ Benefits

• The chance to be part a fast-growing, global cybersecurity company • A collaborative, purpose-driven team with a strong learning mindset • Competitive salary and benefits • Birthday paid day off • Free coffee, lunch, and office snacks • Private medical and life insurance covering employees and family members • Funded certifications and postgraduate programs • Recognition programs including welcome gift, New Year celebration gift, referral bonus, and long-service vouchers • Exposure to international teams, leaders, and challenges • Opportunities for professional growth, development, and innovation

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