About this role.
CrowdStrike is seeking a Senior Security Researcher II for their Advanced Research Team (ART) to conduct vulnerability research, develop automated tools for data analysis, and collaborate across teams. The role involves analyzing patches, identifying exploits, and publishing research. Candidates need strong reverse engineering, software development, and OS internals knowledge. The position is remote in Germany, offering flexibility and autonomy.
Role DNA
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4/5Autonomy Level
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Cover letter sample
I am excited to apply for the Sr. Security Researcher II position at CrowdStrike. With over 5 years of experience in vulnerability research and exploit development, I have a strong track record of identifying and mitigating advanced threats. My expertise in reverse engineering and Python development aligns with the role's requirements for automated analysis and tooling.
I am particularly drawn to CrowdStrike's mission to stop breaches and its AI-native platform. I have successfully analyzed vendor patches and developed proof-of-concept exploits, and I thrive in collaborative, remote environments. My background includes contributions to CTF competitions and published research in the cybersecurity community.
I am eager to bring my skills to the Advanced Research Team and contribute to cutting-edge threat intelligence. Thank you for considering my application.
Sample interview questions
I have over 5 years of experience in vulnerability research. For example, I analyzed a Microsoft Windows kernel patch to identify a privilege escalation vulnerability, developed a proof-of-concept exploit, and reported it responsibly. This involved reverse engineering the patch, understanding the root cause, and crafting an exploit that bypassed mitigations.
I have used LLMs to automate code analysis and generate fuzzing harnesses. For instance, I leveraged GPT-4 to review decompiled code and identify potential vulnerabilities, significantly speeding up the analysis process. I also use them to generate regular expressions for pattern matching in large datasets.
I analyzed a sophisticated APT malware sample using IDA Pro and WinDbg. I used dynamic analysis to trace system calls and static analysis to identify obfuscation techniques. I documented the malware's capabilities, including its command-and-control protocol, and shared indicators of compromise with the threat intelligence team.
I start by comparing patched and unpatched binaries using tools like Diaphora or Bindiff. I focus on changed functions that could indicate security fixes. Then I analyze the root cause of the vulnerability, often by tracing the patch logic and understanding the affected component. I then attempt to reproduce the vulnerability in the unpatched version.
I have deep knowledge of Windows kernel internals (e.g., process management, memory management, and security mechanisms) and Linux systems (e.g., system calls, kernel modules). This understanding is crucial for developing exploits that bypass protections like ASLR and DEP. For example, I used knowledge of Windows kernel pool structures to exploit a heap overflow vulnerability.
As a global leader in cybersecurity, CrowdStrike protects the people, processes and technologies that drive modern organizations. Since 2011, our mission hasn’t changed — we’re here to stop breaches, and we’ve redefined modern security with the world’s most advanced AI-native platform. Our customers span all industries, and they count on CrowdStrike to keep their businesses running, their communities safe and their lives moving forward. We’re also a mission-driven company. We cultivate a culture that gives every CrowdStriker both the flexibility and autonomy to own their careers. We’re always looking to add talented CrowdStrikers to the team who have limitless passion, a relentless focus on innovation and a fanatical commitment to our customers, our community and each other. Ready to join a mission that matters? The future of cybersecurity starts with you.
About the Role:
CrowdStrike Intelligence is seeking a motivated security researcher with excellent technical skills to join the Advanced Research Team (ART). Security Researchers within ART will be expected to apply a broad set of skills to support the CrowdStrike Intelligence mission. ART is responsible for researching and publishing on topics related to information security, providing technical expertise to other teams within CrowdStrike Intelligence, developing tools to support analysts in their day-to-day duties, and collecting technical artifacts about adversary activity.
Aside from working on longer-term research and collection projects, ART security researchers will be required to provide unique solutions on short notice to serve ad-hoc needs by other teams within CrowdStrike Intelligence.
What You’ll Do:
Develop automated solutions for collecting, processing and analyzing data at scale, e.g.
Vendor patch processing and analysis
Identification of exploits in large file collections
Identification of browser exploits
Identification of malicious infrastructure
Perform vulnerability research on a wide variety of targets, e.g.
Analyze vendor patches to identify vulnerabilities and develop proof-of-concept exploits
Review evidence of malicious activities (e.g. log files, payloads) to confirm exploitation of 0-day and n-day vulnerabilities, identify root causes and reproduce exploits
Identify new vulnerabilities in applications or products
Collaborate across other teams at CrowdStrike Intelligence and beyond to
Reproduce emerging vulnerabilities and provide actionable technical information
Inform on information security topics
Satisfy unique technical collection requirements
Publish research results on the CrowdStrike blog or at conferences
What You’ll Need:
Proficiency in English, both written and spoken
Strong information security background with 4+ years experience
Vulnerability research and exploit development experience
Ability to effectively leverage GenAI/LLMs to aid in software development and perform vulnerability research
Reverse engineering experience
Solid understanding of Microsoft Windows and Linux operating system internals
Solid software development experience (Python preferred)
Excellent problem solving skills, creativity and strong analytical skills to investigate, assess, validate, and think outside the box
Ability to work independently, with a customer-oriented mindset
Ability to work remotely, in a collaborative team environment
Bonus Points:
Successful participation in CTF competitions
Experience with mobile platforms and operating systems (e.g. Android, iOS)
Experience with macOS
Experience with the Go or Rust programming languages
Threat Intelligence background
Education:
M.A./M.Sc. or equivalent professional experience in Information Security/Computer Science/Computer Engineering, or a related field
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Benefits of Working at CrowdStrike:
Market leader in compensation and equity awards
Comprehensive physical and mental wellness programs
Competitive vacation and holidays for recharge
Paid parental and adoption leaves
Professional development opportunities for all employees regardless of level or role
Employee Networks, geographic neighborhood groups, and volunteer opportunities to build connections
Vibrant office culture with world class amenities
Great Place to Work Certified™ across the globe
CrowdStrike is proud to be an equal opportunity employer. We are committed to fostering a culture of belonging where everyone is valued for who they are and empowered to succeed. We support veterans and individuals with disabilities through our affirmative action program.
CrowdStrike is committed to providing equal employment opportunity for all employees and applicants for employment. The Company does not discriminate in employment opportunities or practices on the basis of race, color, creed, ethnicity, religion, sex (including pregnancy or pregnancy-related medical conditions), sexual orientation, gender identity, marital or family status, veteran status, age, national origin, ancestry, physical disability (including HIV and AIDS), mental disability, medical condition, genetic information, membership or activity in a local human rights commission, status with regard to public assistance, or any other characteristic protected by law. We base all employment decisions–including recruitment, selection, training, compensation, benefits, discipline, promotions, transfers, lay-offs, return from lay-off, terminations and social/recreational programs–on valid job requirements.
If you need assistance accessing or reviewing the information on this website or need help submitting an application for employment or requesting an accommodation, please contact us at recruiting@crowdstrike.com for further assistance.
Annual salary information is not provided for this position. Explore salary ranges for similar roles in our Salary Directory ›
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