Staff Software Engineer Database Platform (Remote, Equity)

horizon3ai; United States; Remote; USD 180,000 - 260,000; Full time

Benefits offered by this job

Health coverage

Vision coverage

Dental coverage

Flexible vacation

Parental leave

Possible equity

Job summary

horizon3ai is seeking a staff-level database engineer to set technical direction for database architecture and reliability across a platform that handles large volumes of structured security assessment data.

The role combines production engineering, system design, performance work, and mentorship, enabling application teams to build safely on shared data stores. Remote work is supported with robust health benefits and potential equity.

Qualifications

• Eight+ years in software engineering with focus on data infrastructure or database systems.
• Expert PostgreSQL skills including production query tuning, replication, and vacuum/locking diagnostics.
• Strong understanding of normalization, indexing, partitioning, and connection pooling at scale.
• Experience designing zero-downtime migrations for high-volume production systems.
• Ability to write production code, make architecture decisions, and mentor engineers.

Responsibilities

• Set database design standards for schemas, data models, indexing, and query contracts across teams.
• Analyze query plans, resolve performance bottlenecks, and build observability to detect regressions.
• Own reliability practices for data stores, including replication, failover, backup validation, capacity planning, and incident response.
• Design safe schema migration processes with reversible changes, production testing, and zero-downtime rollout practices.
• Advise application teams on schemas, queries, and ORM usage to prevent data-layer issues.
• Mentor engineers through design and code reviews, pairing, and guidance on complex database problems.

Skills

Database design

PostgreSQL expert

Performance tuning

Mentoring engineers

Observability

Tools

PostgreSQL

Job description

horizon3ai is seeking a staff-level database engineer to set technical direction for database architecture and reliability across a platform that handles large volumes of structured security assessment data.

The role combines production engineering, system design, performance work, and mentorship, enabling application teams to build safely on shared data stores. Remote work is supported with robust health benefits and potential equity.