Principal Software Engineer, Database Platform

Horizon3.ai

. Define and drive the Database Platform technical roadmap with engineering leadership and the Pentest Platform organization .

Posted 10/9/2026full-timeRemote • United StatesLead💰 $255,000 - $290,000 per yearWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates extensive expertise in PostgreSQL database architecture, including schema design, query optimization, and migration strategies. Proven ability to mentor engineers and drive database standards across teams while ensuring high performance and scalability.

Highest-signal resume keywords

PostgreSQL ExpertiseDatabase Architecture DesignSchema Migration StrategiesProduction Code Development in Go or PythonMentorship and Code Review

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

Query OptimizationIndexingPartitioningLogical ReplicationConnection Pool TuningMulti-Tenant Database ArchitectureSchema DesignData Architecture TradeoffsGraph Data ModelsProduction Schema Migrations

Soft Skills

Clear CommunicationMentoringCollaboration

Tools & Technologies

FlywayGolang-MigrateNeo4jAWS Neptune

Industry Keywords

Cybersecurity DataTime-Series DatabaseCompliance FamiliarityAnalytical QueryBI/Reporting Experience

Tech Stack

Tools & technologies

AWSCyber SecurityNeo4jPostgresPythonGo

About the role

Key responsibilities & impact

Define and drive the Database Platform technical roadmap with engineering leadership and the Pentest Platform organization
Own database architecture decisions including schema design, partitioning strategies, migration patterns, and scalability approaches
Write design documents that establish the team's shared technical model
Serve as the definitive PostgreSQL expert on query optimization, indexing, partitioning, replication, and connection pooling
Architect and guide the evolution of NodeZero's graph-based asset model representing hosts, services, credentials, and vulnerabilities across pentests
Govern schema design reviews and ensure migrations are safe, reversible, and zero-downtime
Build tooling and engineering practices for rigorous schema changes
Mentor P5 and P4 engineers through code reviews, design reviews, and pairing
Partner with Data Ingestion, Asset Inventory, API Platform, and Security Research on data contracts, query performance standards, and architectural guardrails
Write production code and set technical direction for the Database Platform team

Requirements

What you’ll need

Deep, production-proven PostgreSQL expertise, including query planner internals, advanced indexing, partitioning, logical replication, vacuuming at scale, and connection pool tuning
Experience architecting multi-tenant databases at scale, including row-level security and tenant isolation
Experience with production schema migrations at scale, including zero-downtime migrations, backwards-compatible schema evolution, and migration tooling such as Flyway or golang-migrate
Familiarity with graph data models and graph databases such as Neo4j or AWS Neptune, or graph-like relational query patterns such as recursive CTEs, ltree, and adjacency lists
Proficient in Go or Python and able to write production application code
Demonstrated track record defining database architecture at scale from design document through production across multiple companies or teams
Strong understanding of data architecture tradeoffs, including normalization vs. denormalization, consistency vs. availability, OLTP vs. OLAP separation, and schema-first vs. schema-last design
Ability to reason about long-horizon schema design and 10× data-volume growth
Ability to communicate complex database decisions clearly in design documents, ADRs, and cross-team reviews
Proven ability to drive database standards across multiple teams without direct reporting authority
Experience establishing schema review, migration safety, and query performance review processes
Track record of mentoring engineers through code review, pair programming, and architectural mentorship
Cybersecurity data background, time-series database experience, compliance familiarity, analytical query or BI/reporting experience, and open-source contributions are nice to haves
Must be legally authorized to work in the United States
Full-time availability

Benefits

Comp & perks

Equity package in the form of stock options for all full-time roles
Health, vision & dental insurance for you and your family
Flexible vacation policy
Generous parental leave
Career development opportunities
Inclusive and collaborative work culture
Fully remote work model
Up to 5% travel