Senior Software Engineer, Data Ingestion

GET TO KNOW US Horizon3 http://Horizon3.ai is a fast-growing, remote cybersecurity company dedicated to the mission of enabling organizations to proactively find, fix and verify exploitable attack vectors before criminals exploit them. Our flagship product, the NodeZero™ platform, delivers production-safe autonomous pentests and other key assessment operations that scale across the largest internal, external, cloud, and hybrid cloud environments. NodeZero has been adopted by organizations of all sizes, from small educational institutions to government agencies and Global 100 enterprises. It is used by IT Ops/SecOps teams, consulting pentesters, and MSSPs and MSPs. We are a fusion of former U.S. Special Operations cyber operators, startup engineers & operators, and formerly frustrated cybersecurity practitioners. We're committed to helping solve our common security problems: ineffective security tools and false positives, resulting in alert fatigue, blind spots, "checkbox" security culture, cybersecurity skills shortage, and the long lead time and expense of hiring outside consultants. Collectively, we are a team of learn-it-alls, committed to a culture of respect, collaboration, ownership, and results.     WHAT YOU'LL DO The Sr. Software Engineer on the Data Ingestion team builds and maintains the pipelines that transform raw pentest output into structured, queryable data across the NodeZero platform. NodeZero runs thousands of autonomous pentests — your pipelines are the first link in the chain between execution engine results and the insights customers see. You'll work on high-throughput ETL systems that normalize heterogeneous scan data, push structured findings to graph and relational stores, and feed downstream systems including Asset Inventory, reporting, and analytics. This role reports to the Data Ingestion Engineering Manager and works alongside a small team of backend engineers including one P5 technical anchor. RESPONSIBILITIES - Design, implement, and operate data ingestion pipelines that process pentest results at scale — scan output, discovered assets, vulnerability findings, and network topology data - Own end-to-end delivery of pipeline features: schema design, implementation, testing, deployment, and monitoring - Build and maintain ETL components in Go and/or Python that normalize heterogeneous inputs from NodeZero's execution engines - Partner with the Asset Inventory and Data Platform teams to define and evolve the data contracts that connect ingestion to downstream consumers - Diagnose and resolve production issues in pipeline latency, data correctness, and throughput - Contribute to code and design reviews; provide engineering guidance to P3 engineers on the team   WHAT YOU'LL BRING BACKEND ENGINEERING - 5+ years of professional software engineering experience with production backend systems - Strong Go and/or Python proficiency — this team's primary languages - Demonstrated experience building and operating data pipelines or ETL systems in production (streaming or batch) - Working knowledge of message queues or event streaming systems (Kafka, RabbitMQ, or equivalent) DATA & STORAGE - Experience with relational databases (PostgreSQL or equivalent) — schema design, query optimization, migrations - Familiarity with graph databases or graph data models is a strong asset - Understanding of data normalization trade-offs, schema evolution, and backward compatibility PLATFORM & OPERATIONS - Experience running services on Kubernetes and containerized environments (Docker) - Comfort deploying and debugging distributed systems in AWS or equivalent cloud - Operational mindset: you instrument your code, write runbooks, and own your services through their full lifecycle