Senior Backend Engineer, Admin Experience

Horizon3

5d•$199,000 - $235,000•Remote

About The Position

As a Senior Backend Engineer on the Admin Experience team, you will build the services and APIs that enable NodeZero customers to administer their organizations securely. The work includes user access, parent-child account relationships, account settings, and administration capabilities such as roles, access controls, and audit logs. You will own substantial features from technical design through rollout and production support, applying sound data-modeling and authorization practices to multi-tenant workflows. You will collaborate with Product, frontend engineers, and partner teams to make administration capabilities reliable, understandable, and consistent across the platform. Horizon3 is a fast-growing, fully remote cybersecurity company. Its flagship NodeZero platform provides production-safe autonomous penetration testing and other assessment operations across internal, external, cloud, and hybrid cloud environments. The company describes its culture as based on respect, collaboration, ownership, and results. The role may require up to 5% travel. The stated annual base salary range is $199,000–$235,000, determined according to location, qualifications, experience, and relevant skills. Full-time employees are eligible for an equity package in the form of stock options. Company benefits include health, vision, and dental insurance for employees and their families, a flexible vacation policy, and generous parental leave.

Requirements

Bachelor’s degree in Computer Science, Computer Engineering, or a related field, or equivalent practical experience.
At least 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.
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.

Nice To Haves

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 users.

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 testing, 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.