Principal Software Engineer, Agentic Data Platform

🔥 13 hours ago

🇺🇸 United States – Remote

💵 $255k - $290k / year

⏰ Full Time

🔴 Lead

🚰 Data Engineer

👻 Ghost score 20%

What it means: how likely this posting is sitting open without active hiring.How to read it: 60% or higher means we think this is a ghost. Lower scores are less of a worry.How we score it: age, reposts, open roles vs team size, how fast jobs close, and whether pay is listed.Fine print: an estimate from public data, not a judgment of the company. Real jobs can score high, so treat it as a hint, not a fact.

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Horizon3.ai

WebsiteLinkedInAll Job Openings

51 - 200 employees

Founded 2019

🔒 Cybersecurity

🤖 Artificial Intelligence

☁️ SaaS

Cybersecurity • Artificial Intelligence • SaaS

Horizon3. ai is a cybersecurity company that specializes in autonomous penetration testing through its platform, NodeZero. The company's mission is to proactively identify and address attack vectors before they can be exploited, allowing organizations to continuously assess their security posture across various environments including cloud, IoT, and on-premises systems. Founded by veterans from the US Special Operations and National Security sectors, Horizon3. ai offers a self-service SaaS solution that provides organizations with insights into their security vulnerabilities without requiring persistent or credentialed agents.

📋 Description

• Define and drive the technical roadmap for the Database Platform with engineering leadership and the Pentest Platform organization • Own complex database architecture decisions covering schema design, partitioning, migration patterns, and scalability • Produce design documents that establish the team's shared technical model • Serve as the definitive PostgreSQL expert for query optimization, indexing, partitioning, replication, and connection pooling • Architect and guide the graph-based asset model representing hosts, services, credentials, and vulnerabilities across pentests • Own schema design review processes 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 review, design review, 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 author technical design documents as an individual contributor

🎯 Requirements

• 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 migration at scale, 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, or 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 to 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 substantially larger data volumes • 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 database engineering culture, including schema review norms, migration safety standards, and query performance review processes • Track record of developing engineers through code review, pair programming, and architectural mentorship • Cybersecurity data background, time-series database experience, compliance knowledge, analytical query or BI/reporting experience, and open-source database contributions are nice to have • Minimum 25 Mbps consumer-grade broadband connection required

🏖️ Benefits

• Equity package in the form of stock options may be available • Health, vision, and dental care for employees and their families • Flexible vacation policy • Generous parental leave • Remote work flexibility • Career development opportunities • Inclusive and collaborative work culture • Up to 5% travel may be required