Principal Software Engineer

Come work at a place where innovation and teamwork come together to support the most exciting missions in the world! Job Description Qualys is seeking a Principal Software Engineer to join the Enterprise TruRisk Management (ETM) team, responsible for building large-scale data platforms that power vulnerability management, asset discovery, and threat intelligence across millions of assets globally. In this role, you will design and build high-performance distributed systems that process and analyze massive security datasets. You will collaborate with engineering, product, and architecture teams to develop scalable microservices and data pipelines that enable real-time security insights for enterprise customers. This role requires strong expertise in Java, distributed systems, big data technologies, and large-scale search platforms. Key Responsibilities: Architecture & Design Lead the design and architecture of scalable distributed systems for asset intelligence, finding intelligence and threat management. Define architecture patterns for microservices-based platforms handling high-volume data ingestion and processing. Drive technical direction and platform evolution for ETM data infrastructure. Platform Development Design and implement high-performance backend services in Java. Build and optimize large-scale data pipelines using technologies such as Kafka, Spark, Hadoop, and streaming frameworks. Develop services that support real-time and batch data processing for security analytics. Data Platform & Search Architect and maintain large-scale Elasticsearch/OpenSearch clusters used for asset indexing, finding indexing, its search, and analytics. Design efficient indexing strategies and data models for efficient ingestion Optimize query performance and data retrieval across billions of records. Scalability & Reliability Build fault-tolerant, highly available services capable of operating at cloud scale. Ensure systems meet performance, reliability, and security requirements. Drive improvements in observability, monitoring, and operational excellence. Technical Leadership Provide technical leadership and mentorship to engineering teams. Drive design reviews, architecture discussions, and best practices. Influence cross-team platform strategy and engineering standards. Collaboration Partner with product management, security researchers, and data engineers to deliver impactful ETM features. Work closely with platform and infrastructure teams to optimize system performance and scalability. Job responsibilities: • Excellent programming and designing skills with 8-12 years of hands-on experience in Java back-end development and skills with Spring-boot framework. • Experience with Apache Kafka for distributed streaming and messaging. • In-memory caching using Redis, Memcached, etc. • Strong Java programming skills including object-oriented design, prototyping, development, testing, profiling, etc. • Experience with big data processing frameworks such as Apache Spark and Hadoop. • Expertise with RDBMS systems (preferably Oracle) • Experience with NoSQL databases (preferably Cassandra) • Knowledge of Docker, Kubernetes, Jenkins, and related CI/CD tools • Ability and skill to debug & solve complex issues in a high-performing environment. • Experience with SAAS based software products and solutions for service-oriented deployment in public or private clouds. • Bachelors/Masters in Computer Science or Engineering equivalents **************************** Annual Salary Guidelines: $000,000 - $000,000 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 secu ... (truncated, view full listing at source)