Senior Backend Engineer, Admin Experience

Get to Know Us Horizon3 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 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 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 As a Senior Backend Engineer on the Admin Experience team, you’ll build the services and APIs that let NodeZero customers administer their organizations securely. The work spans user access, parent-child account relationships, account settings, and administration capabilities such as roles, access controls, and audit logs. You’ll own substantial features from technical design through rollout and production support, applying sound data modeling and authorization practices to multi-tenant workflows. You’ll collaborate with Product, frontend engineers, and partner teams to make administration capabilities reliable, understandable, and consistent across the platform. Responsibilities • Design, build, and operate backend services and APIs for user access, account hierarchies, settings, and administration workflows. • Own features from design and implementation through tests, safe rollout, observability, and production support. • Apply secure authorization and data-modeling practices to customer and parent-child account relationships. • Investigate production issues and improve service reliability, performance, and observability. • Write and review maintainable code, automated tests, design documentation, runbooks, and support guidance. • Partner with Product, frontend engineers, and adjacent platform teams to deliver cohesive customer workflows. • Mentor teammates through design discussions, code reviews, and collaborative problem solving. What You’ll Bring • Ability to own complex work end to end, manage competing priorities, and communicate risks and tradeoffs early. • A customer- and security-conscious approach to designing administration and access workflows. • Strong analytical and problem-solving skills, attention to detail, and commitment to high-quality production software. • Clear technical writing and effective collaboration with Product and engineering partners • Interest in sharing knowledge and helping other engineers grow. Required Education / Experience • Bachelor’s degree in Computer Science, Computer Engineering, or a related field, or equivalent practical experience. • 7+ years of professional software engineering experience building production software with a modern programming language. • Experience designing and operating backend services and APIs, and taking complex work from design through production. • Strong SQL and relational database experience, including data modeling and debugging or improving queries. • Experience building services on a cloud platform such as AWS, GCP, or Azure and working with Docker or other containerized applications. • Demonstrated focus on testing, production reliability, observability, and clear technical communication. • Experience with every listed language or framework is not required; depth in relevant areas and the ability to learn are important. What Sets You Apart? • Experience with multi-tenant SaaS, RBAC, SSO, audit logs, delegated administration, or account hierarchy models. • Experience with Python or Go, PostgreSQL, GraphQL, Kubernetes, and CI/CD. • Familiarity with feature flags, metrics, tracing, alerting, and tools such as Datadog, Prometheus, or OpenTelemetry. • Experience in cybersecurity or building customer-facing platform capabilities used by multiple Travel Required We are a fully remote company, and this job may require up to 5% of travel to be successful. Compensation and Values At Horizon3, we believe that our people are our greatest asset, and our compensation philosophy reflects this core value. We are committed to fostering an environment where all employees feel valued, respected, and rewarded for their contributions. Our compensation structure is designed to be fair, competitive, and transparent, ensuring that every team member is recognized and compensated equitably across roles, levels, and locations. In accordance with various State’s transparency regulations, we provide the following salary range information for this position: • Base salary range $199,000 - $235,000 annually. The exact salary will be determined based on the selected candidate’s location, qualifications, experience, and relevant skills. • Additional compensation: All full-time roles are eligible for an equity package in the form of stock options. Perks of Horizon3 • Inclusive Team: We value diversity and promote an inclusive culture where everyone can thrive. • Growth Opportunities: Be part of a dynamic and growing team with numerous career development opportunities. • Innovative Culture: Work in a collaborative environment that encourages creativity and out-of-the-box thinking. • Hybrid & Remote Work: We embrace a mix of remote and hybrid work models depending on role and location, including our Chicago office, where some roles require regular in-office presence. • Competitive Compensation: We offer competitive salary, equity and benefits. Our benefits include health, vision & dental insurance for you and your family, a flexible vacation policy, and generous parental leave. You Belong Here Horizon3 is not just an equal opportunity employer - we are a community that values diversity, equity, and inclusion as fundamental principles of our culture and success. We are dedicated to fostering a workplace where everyone feels welcome and respected, regardless of race, color, religion, sex, national origin, age, disability, veteran status, sexual orientation, gender identity or expression, genetic information, marital status, hair length or any other legally protected status by law. Our commitment to diversity and inclusion means we strive to attract, develop, and retain a workforce that reflects the varied communities we serve. We believe that diverse perspectives drive innovation and strengthen our ability to create cutting-edge cybersecurity solutions. At Horizon3, every team member is valued and supported in an environment that encourages personal and professional growth. We welcome candidates from all backgrounds and experiences, and we encourage all qualified individuals to apply. Come be a part of Horizon3, where your unique contributions are recognized, and your potential is limitless. Other Duties Please note this job description is not designed to cover or contain a comprehensive listing of activities, duties or responsibilities that are required of the employee. Duties, responsibilities, and activities may change at any time with or without notice. Application Note In any materials you submit, you may redact or remove age-identifying information such as age, date of birth, or dates of school attendance or graduation. You will not be penalized for redacting or removing this information.