Senior Security Research Engineer

QLYS_IN Qualys Security TechServices Private Ltd.; India; On-site; INR 2,500,000 - 4,500,000; Full time

Job summary

Qualys, Inc. is seeking a Senior Security Research Engineer to advance vulnerability research and exploit validation across OS, databases, cloud services, and networks. You will own complex projects, mentor peers, and drive automation improvements with a hands-on approach.

You will explore AI-assisted techniques, influence detection content, and help validate security controls in live environments, shaping the next generation of protection for our customers.

Qualifications

• 6+ years of hands-on experience in vulnerability research, penetration testing, detection engineering, or security research.
• Strong background in vulnerability analysis, exploit development, and modern attack techniques.
• Solid understanding of core protocols, including TCP/IP, HTTP/HTTPS, FTP, SSH, SMTP, DNS, SSL/TLS, and modern web protocols.
• Broad knowledge of operating systems, databases, web technologies, cloud environments, and enterprise infrastructure.
• Proficiency with Python and Bash scripting.
• Experience with packet analysis, network troubleshooting, and protocol reverse engineering.
• Working knowledge of the OWASP Top 10, common attack techniques, and current threat actor tactics.
• Track record of leading projects and mentoring technical teammates.
• Strong written, verbal, and technical communication skills.

Responsibilities

• Lead vulnerability research across operating systems, databases, enterprise applications, cloud services, container platforms, and network devices. Research newly disclosed, zero-day, and actively exploited vulnerabilities, and prioritize work based on real-world risk. Analyze root causes, attack vectors, exploitability conditions, and potential business impact. Review technical designs, research methods, and code contributions for quality and consistency.
• Build exploit-based validation techniques that confirm whether vulnerabilities are exploitable in practice. Design safe, controlled validation methods that emulate attacker behavior without affecting production systems. Write validation logic that determines whether existing security controls such as WAFs, firewalls, EDRs, IPS, and compensating controls actually block exploitation. Set coding standards and quality guidelines for signature and detection content.
• Improve automation across vulnerability research, exploit validation, content generation, testing, and release. Find and apply ways to use AI and LLM to speed up research work. Improve tooling and workflows to raise research quality and output.

Skills

Vulnerability research

Penetration testing

Detection engineering

Security research

Python

Bash scripting

Tools

Wireshark

TCPDump

ELK Stack

Job description

Come work at a place where innovation and teamwork come together to support the most exciting missions in the world!

Senior Security Research Engineer, Vulnerability Research & Exploit Validation

About the Team

Qualys is a recognized leader in cloud security and vulnerability management, trusted by thousands of organizations worldwide. Our Threat Research team is known for its work on vulnerability research, exploit analysis, and detection content that protects customers against real-world attacks.

About the Role

We are hiring a Senior Security Research Engineer to work on vulnerability research and exploit validation across a wide range of technologies, including operating systems, databases, enterprise applications, cloud services, container platforms, and network devices. You will research vulnerabilities, confirm whether they can be exploited in the real world, and turn that work into detection and protection content. This is a hands-on, senior individual-contributor role. You will own complex research projects, mentor other engineers, work closely with Engineering and Product, and help improve automation across the team. The role comes with real freedom to choose the research topics and areas you go deep on, along with clear opportunities to grow your career at Qualys.

Responsibilities

• Lead vulnerability research across operating systems, databases, enterprise applications, cloud services, container platforms, and network devices. Research newly disclosed, zero-day, and actively exploited vulnerabilities, and prioritize work based on real-world risk. Analyze root causes, attack vectors, exploitability conditions, and potential business impact. Review technical designs, research methods, and code contributions for quality and consistency.
• Build exploit-based validation techniques that confirm whether vulnerabilities are exploitable in practice. Design safe, controlled validation methods that emulate attacker behavior without affecting production systems. Write validation logic that determines whether existing security controls such as WAFs, firewalls, EDRs, IPS, and compensating controls actually block exploitation. Set coding standards and quality guidelines for signature and detection content.
• Improve automation across vulnerability research, exploit validation, content generation, testing, and release. Find and apply ways to use AI and LLM to speed up research work. Improve tooling and workflows to raise research quality and output.

Required Qualifications

• 6+ years of hands-on experience in vulnerability research, penetration testing, detection engineering, or security research.
• Strong background in vulnerability analysis, exploit development, and modern attack techniques.
• Solid understanding of core protocols, including TCP/IP, HTTP/HTTPS, FTP, SSH, SMTP, DNS, SSL/TLS, and modern web protocols.
• Broad knowledge of operating systems, databases, web technologies, cloud environments, and enterprise infrastructure.
• Proficiency with Python and Bash scripting.
• Experience with packet analysis, network troubleshooting, and protocol reverse engineering.
• Working knowledge of the OWASP Top 10, common attack techniques, and current threat actor tactics.
• Track record of leading projects and mentoring technical teammates.
• Strong written, verbal, and technical communication skills.

Preferred Qualifications

• Experience applying AI or LLM to security research or detection engineering.
• Contributions to CVEs, security advisories, open-source security tooling, or published research.
• Relevant certifications such as OSCP, OSCE, OSED, or GXPN (nice to have, not required).
• Experience building detection content or signatures for IPS, WAF, or EDR platforms.

Qualys, Inc. (NASDAQ: QLYS) is a pioneer and leading provider of disruptive cloud-based security, compliance and IT solutions with more than 10,000 subscription customers worldwide, including a majority of the Forbes Global 100 and Fortune 100. Qualys helps organizations streamline and automate their security and compliance solutions onto a single platform for greater agility, better business outcomes, and substantial cost savings.