200K–235K USD / year
Senior Backend Engineer, External
BackendRemote — United States
Published on 2026-10-19
These details were extracted automatically from the original listing. They may not be complete or fully up to date — it's worth checking the original job post.
About this role
Build and operate backend services that power NodeZero’s external penetration-testing capabilities. The role spans APIs, workflow orchestration, data pipelines, cloud infrastructure, and production reliability.
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
External Attack team
Stack
PythonAWSKubernetesDockerPrefectTemporalAirflowCelery
What you'll do
- Develop and maintain core Python API features.
- Build reliable workflow orchestration for large-scale, long-running workloads.
- Create high-throughput data-processing and ETL pipelines.
- Contribute to AWS datalake architecture and query performance.
- Deploy and operate Kubernetes services, including release and capacity planning.
- Build GraphQL and graph-based APIs for exploring data relationships.
- Own service observability, uptime, scalability, and on-call participation.
- Write design documentation and collaborate with product and frontend teams.
What we're looking for
- Bachelor’s degree in Computer Science, Computer Engineering, or a related field.
- 7+ years of professional software engineering experience.
- Production experience with workflow orchestration or distributed task-processing systems.
- Hands-on experience building high-throughput data-processing systems and ETL pipelines.
- Cloud platform experience and practical use of Docker and Kubernetes.
- Must be a U.S. person and eligible to obtain a U.S. federal security clearance.
Nice to have
- Deep Kubernetes deployment, cluster-management, and production-troubleshooting experience.
- Experience with durable-execution engines such as Temporal or Prefect.
- Experience with GraphQL backends and graph databases.
- Experience owning production observability, uptime, and scalability.
- Datalake architecture or internal platform-tooling experience.
- Cybersecurity or attack-surface and vulnerability-data experience.
Benefits
- Stock options
- Flexible vacation policy
- Generous parental leave
- Health, vision, and dental insurance