Senior Backend Engineer, External
Horizon3 AI2 hours ago
Remote, United StatesSenior
Base Salary
$200k - $235k/yr
Responsibilities
- Design, build, and maintain features in the core Python API.
- Design, build, and operate durable workflow orchestration for large-scale concurrent workloads, including scheduling, retries, idempotency, state management, and failure recovery.
- Build high-throughput data processing and ETL pipelines that convert assessment data into reliable queryable datasets.
- Contribute to AWS data lake architecture, including storage layout, partitioning, schema evolution, and query performance.
- Deploy and manage services on Kubernetes and participate in cluster operations, release management, and capacity planning.
- Develop and extend GraphQL and graph-based APIs for exploring complex data relationships.
- Own observability, uptime, scalability, alerting, tracing, and on-call operations for built services.
- Partner with frontend engineers, product managers, and designers to deliver user-facing backend capabilities.
- Contribute to systems architecture decisions and write design documentation, runbooks, and API documentation.
Requirements
- Bachelor’s degree in computer science, computer engineering, or a related field.
- At least 7 years of professional software engineering experience using modern object-oriented or functional languages.
- Production experience building and operating workflow orchestration or distributed task-processing systems such as Prefect, Temporal, Airflow, or Celery.
- Hands-on experience designing and building high-throughput data processing systems and ETL pipelines.
- Experience building applications on cloud platforms such as AWS, Azure, or GCP using Docker and Kubernetes.
- Ability to manage concurrent initiatives, prioritize effectively, and work independently and collaboratively.
- Experience designing for retries, partial failure, recovery, and asynchronous-system debugging.
- Deep Kubernetes experience, including deployment and cluster management and troubleshooting production workloads.
- Experience with durable-execution or workflow engines, GraphQL backends, graph databases, observability, data lakes, cloud services, platform capabilities, or internal tooling.
- Cybersecurity or attack-surface and vulnerability-data experience is a preferred qualification.
- Must be a US person and eligible to successfully secure a US Federal Security Clearance.
Benefits
- Fully remote work arrangement with up to 5% travel required; some company roles may use hybrid arrangements and the Chicago office.
- Health, vision, and dental insurance for employees and families.
- Flexible vacation policy and generous parental leave.
- Growth and career development opportunities in a collaborative, inclusive environment.
- Equity package in the form of stock options for full-time roles.
Tech Stack
Apache AirflowAWSAzureC++DatadogDockerGoGoogle Cloud PlatformGraphQLJavaKubernetesPrometheusPythonScalaSQLTypeScript
Categories
BackendData Engineering
About Horizon3 AI
Horizon3 AI builds NodeZero, a proactive security platform that autonomously performs penetration testing and validates attack paths across on‑prem, cloud, and hybrid environments. The company sells its software by subscription to security and IT teams at enterprises and government agencies, helping prioritize and verify fixes. Founded in 2019 and headquartered in San Francisco, it is privately held and serves customers across regulated industries and the public sector.