Senior Backend Engineer, Data & App Platform

The role

The Pentest Data Platform team builds a scalable, event-driven architecture to ingest and process NodeZero pentest telemetry. You will design streaming services, manage SQL-backed storage, and transition data processing from a batch-centric monolith to microservices.

What you will do

• Own event-driven pipelines end to end
• Solve real-time asset identity problems
• Evolve the data model using PostgreSQL
• Drive enterprise scalability and database performance
• Translate batch logic into streaming designs
• Build and maintain shared platform infrastructure
• Own operational excellence and participate in on-call rotations
• Raise the technical bar through design reviews and technical writing

Required qualifications

• 4+ years of software engineering experience
• Proficiency in Python, Go, or similar languages
• Experience in large-scale production codebases
• Production experience with PostgreSQL including schema design, migrations, and query performance at scale
• Experience building and operating large scale distributed services in AWS (or comparable cloud)
• Experience with containers and orchestration (Docker, Kubernetes)
• Hands-on experience with production observability tooling (Datadog, OpenTelemetry, or similar)
• Bachelor's degree in Computer Science, Computer Engineering, or a related field, or equivalent practical experience

Nice to have

• Production experience with event-driven architectures or streaming platforms (Kafka preferred; Kinesis or Flink also relevant)
• Experience migrating a live system from batch to streaming, or decomposing a monolith into services
• Experience with Redshift or other columnar/analytical data platforms
• ETL orchestration experience with Argo, Airflow, Temporal, or comparable tools
• Graph database experience (Neo4j) and graph data modeling alongside SQL
• Experience with data reconciliation, backpressure, replay, retries, and schema evolution at scale
• Background in cybersecurity, pentesting, or vulnerability management
• Experience with data-at-rest and in-transit encryption patterns (envelope encryption, KMS)

Benefits

• Equity package in the form of stock options
• Health, vision & dental insurance for you and your family
• Flexible vacation policy
• Generous parental leave

Before you apply

• Minimum 25Mbps consumer grade broadband connection required

About the company

Horizon3 is a remote cybersecurity company dedicated to enabling organizations to proactively find, fix and verify exploitable attack vectors. The team is a fusion of former U.S. Special Operations cyber operators, startup engineers and operators, and formerly frustrated cybersecurity practitioners.