229K–270K USD / year
Staff Backend Engineer, Internal
BackendRemote — United States
Published on 2026-11-06
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About this role
Lead the architecture and delivery of backend systems powering NodeZero’s internal penetration-testing capabilities. Build and operate reliable data workflows that turn attack-path data into accurate, queryable customer results.
About the company
Horizon3.ai is a technology company specializing in cybersecurity solutions, focusing on automated penetration testing and threat detection for enterprises. They provide a range of services aimed at enhancing security posture and risk management for organizations across various sectors.
The team
Internal Attack team within Proactive Offense.
Stack
PythonSQLGraphQLSQLAlchemyuvruffmypypytest
What you'll do
- Set technical direction for core Python services, APIs, and relational data models.
- Lead complex backend initiatives across engineering and product teams.
- Design reliable, observable processing workflows with retries, recovery, and clear progress tracking.
- Build and operate high-throughput ETL pipelines for attack-path data.
- Optimize SQL and shape GraphQL and graph-based APIs.
- Own operational health, production readiness, and on-call practices.
- Write architecture documents and mentor engineers.
What we're looking for
- Bachelor’s degree in Computer Science, Computer Engineering, or a related field.
- 8+ years of professional software engineering experience.
- Technical leadership delivering complex backend or data-platform initiatives across teams.
- Experience building and operating production ETL, data-processing, or distributed task systems at scale.
- Production experience with backend APIs, relational data models, and SQL.
- Cloud-platform and Docker experience.
Nice to have
- Deep experience optimizing complex SQL queries.
- Fluency with the team’s Python toolchain, including SQLAlchemy, migrations, uv, ruff, mypy, and pytest.
- Experience with workflow orchestration, GraphQL backends, or Neo4j.
- Experience with observability tools such as Datadog, Prometheus, or OpenTelemetry.
- Kubernetes, cybersecurity, attack-path data, or internal tooling experience.
Benefits
- Stock options
- Health, vision, and dental insurance for employees and families
- Flexible vacation policy
- Generous parental leave