<p>Come work at a place where innovation and teamwork come together to support the most exciting missions in the world!</p> <p>About the Role</p> <p>We are looking for a seasoned Lead Software Engineer - Sustenance Engineering to support and enhance our network vulnerability scanning platform. This role is ideal for someone who thrives on maintaining complex systems, resolving challenging issues, and ensuring the long-term stability, performance, and security of a mature product. You will work closely with cross-functional teams to troubleshoot, optimize, and evolve a security product that operates across low-level network and application-layer protocols.</p> <p>Key Responsibilities</p> <ul> <li>Maintain and enhance core components of a network vulnerability scanning engine written in C/C++. </li><li>Investigate, debug, and resolve complex issues in production and development environments, including networking, containerization, and system-level interactions. </li><li>Optimize existing code for performance, reliability, and scalability. </li><li>Ensure compatibility and stability across evolving environments (OS, libraries, containers). </li><li>Collaborate with product management, QA, DevOps, and security researchers to triage issues and deliver timely fixes and updates. </li><li>Participate in code reviews and contribute to improving software quality, maintainability, and security posture. </li><li>Support CI/CD pipelines and automation for regression testing and deployment. </li></ul> <p>Required Qualifications</p> <ul> <li>Bachelor's or Master's degree in Computer Science, Software Engineering, or a related field. </li><li>Strong proficiency in C/C++ with a focus on systems-level programming and debugging. </li><li>Solid understanding of networking fundamentals (TCP/IP, sockets, HTTP, SMB, SSH, etc.). </li><li>Experience with Linux systems programming, performance tuning, and debugging tools (e.g., gdb, strace, perf). </li><li>Hands-on experience with Docker and containerized environments. </li><li>Strong analytical and problem-solving skills with a focus on root cause analysis and long-term fixes. </li></ul> <p>Preferred Qualifications</p> <ul> <li>Prior experience in engineering roles for security or networking products. </li><li>Exposure to CI/CD pipelines and DevOps practices. </li><li>Understanding of secure coding practices and cryptographic libraries. </li><li>Experience with cloud platforms such as AWS, OCI, or Azure. </li><li>Passion for automation and scripting to reduce manual effort and improve reliability. </li></ul> <p>Annual Salary Guidelines: $155,000 - $175,000</p> <p>Qualys is an Equal Opportunity Employer, please see our EEO policy.</p>