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Principal Software Engineer

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Principal Software Engineer in USA new

  • Horizon3 AI
  • Full time
  • Email
  • Remote

Responsibilities

  • Define and drive the Database Platform technical roadmap with engineering leadership.
  • Own database architecture decisions involving schema design, partitioning, migrations, scalability, and multi-tenant data isolation.
  • Establish PostgreSQL standards for query optimization, indexing, replication, vacuuming, and connection pooling.
  • Architect and guide graph-based asset data models representing hosts, services, credentials, and vulnerabilities.
  • Own schema review processes and ensure migrations are safe, reversible, backward-compatible, and zero-downtime.
  • Build tooling and standards for schema governance, migration safety, and query performance review.
  • Mentor P4 and P5 engineers through code review, design review, pairing, and architectural guidance.
  • Define data contracts and architectural guardrails with Data Ingestion, Asset Inventory, API Platform, and Security Research teams.

Requirements

  • Deep, production-proven PostgreSQL expertise, including query planner internals, advanced indexing, partitioning, logical replication, vacuuming, and connection pool tuning.
  • Experience architecting multi-tenant databases at scale, including row-level security, tenant isolation, and shared-schema versus schema-per-tenant designs.
  • Production experience with zero-downtime migrations, backward-compatible schema evolution, and migration tooling such as Flyway or golang-migrate.
  • Familiarity with graph data models and graph databases such as Neo4j and AWS Neptune, or graph-like relational query patterns including recursive CTEs, ltree, and adjacency lists.
  • Proficiency in Go or Python with the ability to write production application code.
  • A demonstrated track record of defining database architecture from design through production across multiple companies or teams.
  • Strong understanding of data architecture tradeoffs, including normalization, denormalization, consistency, availability, OLTP, OLAP, and schema design approaches.
  • Ability to reason about long-term schema design and communicate complex database decisions through design documents, ADRs, and cross-team reviews.
  • Experience driving database standards and engineering culture across teams without direct reporting authority.
  • Experience mentoring engineers through code review, pair programming, and architectural guidance.
  • Preferred experience with cybersecurity data, time-series databases, SOC 2 Type II, FedRAMP, GDPR/CCPA, analytical workloads, BI/reporting, or open-source PostgreSQL and database tooling.

Benefits

  • Fully remote work at a 100% remote company.
  • Minimum 25 Mbps consumer-grade broadband connection required.
  • Up to 5% travel may be required.
  • Health, vision, and dental coverage for employees and families.
  • Flexible vacation policy and generous parental leave.
  • Growth and career development opportunities.
  • Inclusive, collaborative, and innovative work culture.
  • Potential eligibility for equity in the form of stock options.

Salary: $255k - $290k/yr

Horizon3 AI

Horizon3.ai answers the two most important questions in cybersecurity: If someone tried to compromise us, would we hold up? And, how do we withstand the onslaught of AI-powered attacks? Horizon3.ai’s NodeZero® shifts the advantage from attackers to defenders by giving organizations the power to f...

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