Staff DB Architect - PostgreSQL & Graph DBs (Remote)

Horizon3.ai; United States; Remote; USD 230,000 - 260,000; Full time

Benefits offered by this job

Inclusive Team

Growth Opportunities

Innovative Culture

Remote Work

Competitive Compensation

Job summary

Horizon3.ai is a remote-first cybersecurity company building the NodeZero platform that enables autonomous pentests and data-rich assessments across complex environments.

The Staff Engineer on the DB Platform team will own database architecture, reliability, and scalability, shaping strategies for PostgreSQL, graph databases, and time-series stores while mentoring other engineers and delivering production-grade systems across Kubernetes and cloud environments.

Qualifications

• 8+ years of professional software engineering experience with deep specialization in database systems and data infrastructure.
• Expert‑level PostgreSQL proficiency — you have tuned complex production query plans, managed replication topology, and debugged the hardest vacuum and locking issues.
• Deep understanding of database architecture trade‑offs: normalization vs. denormalization, indexing strategies, partitioning, and connection pooling at scale.
• Experience designing zero‑downtime migration workflows in high‑volume production environments.

Responsibilities

• Database Architecture: Set the technical direction for Horizon3's database systems — schema design philosophy, data modeling standards, indexing strategies, and query contract design across teams
• Performance Engineering: Own query performance across the platform — identify slow queries, produce execution plan analyses, implement fixes, and design the observability systems that catch regressions early
• Reliability & Operations: Own the reliability engineering for all data stores — replication, failover, backup validation, capacity planning, and database incident response
• Migration Engineering: Design and own the migration framework that makes schema evolution safe in production — zero‑downtime migrations, reversible changes, and migration testing standards
• Cross‑team Enablement: Serve as the database expert for application engineering teams — review their schemas, query patterns, and ORM usage; set the access patterns that prevent problems from reaching production
• Mentorship: Mentor P4 engineers through design review, code review, and deep technical pairing; be the person the team turns to when they hit a hard database problem

Skills

8+ years exp

PostgreSQL proficiency

DB architecture

Go or Python

Kubernetes

Timescale/TSDB

Graph DB knowledge

Tools

Neo4j

ClickHouse

Cloud SQL/RDS

Job description

Horizon3.ai is a remote-first cybersecurity company building the NodeZero platform that enables autonomous pentests and data-rich assessments across complex environments.

The Staff Engineer on the DB Platform team will own database architecture, reliability, and scalability, shaping strategies for PostgreSQL, graph databases, and time-series stores while mentoring other engineers and delivering production-grade systems across Kubernetes and cloud environments.