Senior Software Engineer

Come work at a place where innovation and teamwork come together to support the most exciting missions in the world! About the Role We are seeking a highly skilled Software Engineer to join our team building a network vulnerability scanning platform deployed as a Docker container. This role involves designing, developing, and maintaining a complex security product that operates at both low-level network and application-layer protocols, with a strong focus on performance, reliability, and security. Key Responsibilities Design, develop, and maintain core components of a network vulnerability scanning engine in C/C++. Analyze requirements and collaborate with product management and security researchers to translate them into robust, scalable implementations. Implement and optimize network protocol handling at both low-level (TCP/IP, packet parsing) and application-layer protocols (HTTP(S), SMB, SSH, etc.). Integrate and maintain the scanner within Dockerized environments, ensuring portability and reliability. Participate in code reviews, enforce best practices, and contribute to improving software quality and security. Troubleshoot and debug complex issues involving networking, container environments, and system-level interactions. Collaborate cross-functionally with QA, DevOps, and security researchers to deliver high-quality releases on time. Required Qualifications Bachelor’s or Master’s degree in Computer Science, Software Engineering, or a related field. Strong proficiency in C/C++ for systems programming. Solid understanding of computer networking, including TCP/IP, sockets programming, and application-layer protocols (HTTP, SMB, SSH, etc.). Experience with Linux systems programming and debugging at low levels (network stack, file systems, concurrency). Hands-on experience with Docker and Kubernetes (building, deploying, troubleshooting containerized applications). Strong problem-solving and debugging skills, with attention to performance and scalability. Preferred Qualifications Experience in security software development or vulnerability scanning tools. Familiarity with container orchestration (Kubernetes, Docker Compose). Experience with CI/CD pipelines and modern DevOps workflows. Knowledge of secure coding practices and exposure to cryptographic libraries. Experience with Cloud providers such as AWS/OCI/Azure is a big plus. Strong affinity to automation for any repetitive tasks. Join our talent community and receive the latest Qualys news, content, and be first in line for new job opportunities. Join our Talent Community! 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.