Senior Engineer, Back-End (Security Controls)

Get to Know Us Horizon3 is a fast-growing, remote cybersecurity company dedicated to the mission of enabling organizations to proactively find and fix and verify exploitable attack vectors before criminals exploit them. Our flagship product, the NodeZeroTM 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 ITOps/SecOps teams, consulting pentesters, and MSSPs and MSPs.  We are a fusion of former U.S. Special Operations cyber operators, startup engineers, and formerly frustrated cybersecurity practitioners. We're committed to helping solve our common security problems: ineffective security tools, 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.

Overview: The Senior Backend Engineer will join our world-class software engineering team as a key contributor to both user-facing product launches and platform enhancements and stability. You will own our security controls integration platform, abstracting the complexity of the EDR ecosystem from the rest of our system. Core responsibilities include developing per-vendor normalizers, building live API pipelines, defining internal schemas, and managing versioning, deprecations, fault tolerance, and integration health monitoring. You'll also collaborate with the broader backend engineering team on cross-cutting scale and reliability work. What You’ll Do Responsibilities Design and build dedicated normalizers per EDR vendor, with the testing rigor to keep them trustworthy as vendor APIs evolve Develop core product features in ETL (Extract, Transform, Load) and GraphQL to support data processing and retrieval. Design and implement backend APIs in GraphQL to facilitate data interactions between different components of the product. Build and maintain ETL pipelines for efficient data processing and analytics. Collaborate with frontend team members to present data in a clear and user-friendly format, enhancing the product's user experience. What You’ll Bring Deep experience building and maintaining third-party API integrations at scale Hands-on familiarity with EDR platforms and an understanding of how SOC teams consume EDR data Driven, self-managed, capable of conceiving and implementing solutions on your own and with a team A strong desire to continuously improve and learn new technologies in a fast-paced Agile development environment Excellent analytical and problem-solving skills, effective communication, attention to detail and high-quality work Strong technical documentation ability to support the development process. Effective communication and collaboration with designers, developers, and product managers. Ability and interest in mentoring junior and mid-level engineers to foster their growth and development. Required Education / Experience Bachelor's Degree in Computer Science, Computer Engineering or related field. 7+ yrs professional software engineering experience using modern object-oriented or functional languages (Python, Java, Go, Scala, C++, TypeScript, etc). Experience building applications on cloud computing platforms such as AWS, Azure, GCP, using container technologies such as Docker and Kubernetes. Expert proficiency in SQL. Preferred Education/Experience Experience with various database architectures including relational (PostgreSQL) and graph (Neo4j). Experience building GraphQL backends. Experience managing and maintaining production infrastructure. Experience building platform capabilities for internal teams.   Perks of