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Principal Software Engineer, Agentic Data Platform

Horizon3 AI· Engineering
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Remote$255k - $290k + equityFull-timePosted 1w ago

About the role

Principal Engineer for Database Platform at NodeZero, responsible for technical leadership and architecture of NodeZero's data infrastructure, with deep focus on PostgreSQL, graph data, multi-tenant schemas, and scalable data pipelines in a remote, fully distributed environment.

Responsibilities

  • Technical Strategy: Define and drive the technical roadmap for the Database Platform in partnership with the Senior Engineering Manager and the broader Pentest Platform organization.
  • Architecture Leadership: Own the most complex database architecture decisions — schema design, partitioning strategies, migration patterns, and scalability approaches. Produce design documents that become the shared technical model for the team.
  • PostgreSQL Excellence: Be NodeZero's definitive expert on PostgreSQL at scale — query optimization, indexing, partitioning, replication, and connection pooling. Set the standards the team follows and catch the problems others miss.
  • Graph & Multi-model Data: Architect and guide the evolution of NodeZero's graph-based asset model — the data structure that represents how discovered hosts, services, credentials, and vulnerabilities relate to each other across pentests.
  • Schema Governance: Own schema design review processes. Ensure every migration is safe, reversible, and zero-downtime. Build the tooling and culture that treats schema changes with the same rigor as production code changes.
  • Mentorship & Bar Raising: Mentor P5 and P4 engineers through code review, design review, and pairing. Be the person on the team that raises everyone else's ceiling.
  • Cross-functional Influence: Partner with Data Ingestion, Asset Inventory, API Platform, and Security Research to define data contracts, query performance standards, and architectural guardrails that span the full data pipeline.

Qualifications

  • Deep, production-proven PostgreSQL expertise: query planner internals, advanced indexing (partial, expression, GiST/GIN), partitioning strategies, logical replication, vacuuming at scale, and connection pool tuning.
  • Experience architecting multi-tenant databases at scale: row-level security, tenant isolation, schema-per-tenant vs. shared-schema tradeoffs.
  • Experience with schema migration at scale in production systems: zero-downtime migrations, backwards-compatible schema evolution, and migration tooling (Flyway, golang-migrate, or equivalent).
  • Familiarity with graph data models and graph databases (Neo4j, AWS Neptune) or graph-like query patterns in relational systems (recursive CTEs, ltree, adjacency list).
  • Proficient in Go or Python — able to write production application code, not just SQL.
  • Demonstrated track record of defining database architecture at scale — from design doc to production — across multiple companies or teams.
  • Strong opinions on data architecture tradeoffs: normalization vs. denormalization, consistency vs. availability, OLTP vs. OLAP workload separation, and schema-first vs. schema-last design.
  • Ability to reason about long-horizon schema design: what does this schema look like in two years, at 10× the current data volume, with three new feature teams writing to it?
  • Ability to communicate complex database decisions clearly in writing — for design docs, ADRs, and cross-team reviews — so engineers without deep DB expertise can understand and apply the reasoning.
  • Proven ability to drive database standards across multiple teams without direct reporting authority.
  • Experience establishing database engineering culture: schema review norms, migration safety standards, and query performance review processes.
  • Track record of growing engineers through code review, pair programming, and architectural mentorship.

Skills

Required:PostgreSQL expertiseMulti-tenant database designSchema migrations at scaleGraph data modelingGo or Python

Benefits

  • Inclusive Team: We value diversity and promote an inclusive culture where everyone can thrive.
  • Growth Opportunities: Be part of a dynamic and growing team with numerous career development opportunities.
  • Innovative Culture: Work in a collaborative environment that encourages creativity and out-of-the-box thinking.
  • Remote Work: We are a 100% remote company. Enjoy the flexibility to work in the way that supports you and brings out your best.
  • Competitive Compensation: We offer competitive salary and benefits which includes health, vision & dental care for you and your family, a flexible vacation policy, and generous parental leave.
Last updated Oct 15, 2026. Interested? Apply on the company site.

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