Senior Backend Engineer, Defensive Agent

New

Horizon3Cybersecurity

US, RemoteFull-TimeSenior

Salary$199,000 - $235,000 annually

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Job Details

Bachelor's degree in Computer Science, Computer Engineering, or a related field.
7+ years of professional software engineering experience using modern object-oriented or functional languages (e.g., Python, Go, Scala, C++, TypeScript).
Experience building applications on cloud computing platforms (AWS, Azure, or GCP).
Proficiency with container technologies such as Docker and Kubernetes.
Expert-level proficiency in SQL.
Demonstrated experience designing and operating production-grade distributed systems (asynchronous workflows, queues, retries, idempotency, partial failure).
Proven track record of shipping and operating production services, including on-call responsibilities.
Experience with database architectures like PostgreSQL or Neo4j.
Experience with observability tooling (e.g., Datadog, Prometheus, Grafana).
Experience building GraphQL backends.

Build and own the agent execution runtime with durable, resumable, long-running workflows.
Design and implement the tool layer including versioning, schema validation, and server-side authorization.
Build the connector framework for third-party security control planes like EDR, firewalls, and cloud IAM.
Implement safe-change pipelines featuring simulation, blast-radius classification, approval gates, and immutable audit trails.
Extend tenant isolation models to cover execution boundaries and egress control.
Develop product features in ETL and GraphQL for agent data processing and remediation state.
Build ETL pipelines to transform pentest outcomes into training datasets for AI researchers.
Instrument systems with distributed tracing and observability tools to monitor agent behavior and performance.

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