Horizon3AI
Senior Backend Engineer, Autonomous Defense
$170K–$235K
US, Remote · Remote · Senior · Full-time · Posted Sep 14, 2026
- Experience
- 7+ years professional software engineering experience.
- Education
- Bachelor's Degree in Computer Science, Computer Engineering or related field.
About the job
Build the backend platform that runs NodeZero’s defensive agents safely and reliably across customer environments, turning AI-research capabilities into production systems.
What you'll do
- Build agent runtime, tool, connector, and orchestration systems, including durable workflows and tenant-level authorization.
- Implement safe-change controls such as simulation, approval gates, staged rollout, rollback, and audit trails; extend isolation and observability for agent actions.
- Develop ETL and GraphQL features and pipelines for agent context, run history, remediation state, and research datasets; partner with AI researchers and product teams.
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.
- Experience building applications on cloud computing platforms such as AWS, Azure, GCP, using container technologies such as Docker and Kubernetes.
- Expert proficiency in SQL and demonstrated experience designing and operating distributed systems in production.
Nice to have
- Experience building agentic or LLM-backed systems in production.
- Experience with durable execution or workflow engines, multi-tenant platforms, third-party APIs, security control planes, GraphQL backends, or observability tooling.
Pay
$170,000 - $235,000 annually (base salary)
Tools
Python, Go, Scala, C++, TypeScript, AWS, Azure, GCP, Docker
AI focus
Build production infrastructure for defensive agents, working with AI researchers; the role builds the substrate for agent capabilities rather than tuning prompts. Also build ETL pipelines for datasets researchers train and evaluate against.
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