Horizon3AI
Senior Backend Engineer, External
$200K–$235K
US, Remote · Remote · Senior · Full-time · Posted Oct 19, 2026
- Experience
- 7+ years; no stated alternative.
- Education
- Bachelor's Degree in Computer Science, Computer Engineering or related field.
- Visa sponsorship
- Only US persons can interview. Employee must be eligible for and successfully secure a US Federal Security Clearance as a condition of employment.
About the job
Build and operate backend services powering NodeZero’s external penetration-testing capabilities, including APIs, workflow orchestration, data pipelines, and cloud infrastructure.
What you'll do
- Develop and maintain the core Python API and scalable workflow orchestration for long-running workloads.
- Build and operate high-throughput ETL pipelines and contribute to AWS datalake architecture.
- Deploy and operate services on Kubernetes, owning production observability, uptime, and scalability.
What they ask for
- Bachelor's Degree in Computer Science, Computer Engineering or related field.
- 7+ yrs professional software engineering experience using modern object-oriented or functional languages.
- Production experience building and running workflow orchestration or distributed task-processing systems.
- Hands-on experience building high-throughput data processing and ETL systems, plus cloud applications using container technologies.
Nice to have
- Deep Kubernetes experience; experience with durable-execution or workflow engines such as Temporal or Prefect.
- GraphQL and graph database experience, production observability ownership, datalake architecture, platform tooling, or cybersecurity experience.
Pay
$199,750 - $235,000 annually (base salary)
Tools
Python, Prefect, Temporal, Airflow, Celery, AWS, Docker, Kubernetes
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