Database Engineer

About Liaison

Liaison is an AI infrastructure and data company. Our platform connects to the systems a business already runs on, builds a unified view of its operations, and deploys agents that act on that context the way the owner would, bringing forward only the decisions that require a person. Our work spans agent engineering, model training outputs for small language models (SLMs), and frontier-level research, and we build our agent runtime and integrations in-house.

What month 12 looks like

You own a meaningful part of the data layer, such as a family of ingestion pipelines, a set of performance fixes or part of the record-matching logic, and it has made the data measurably cleaner or faster.

What you will do

• Build and maintain pipelines that bring data in from outside tools
• Find and fix slow queries, and add the right indexes
• Help design schemas for new data sources
• Work on matching and merging duplicate records across tools
• Debug data problems from logs and fix the cause
• Review your own and others' changes

Required

• Has worked with production Postgres, including writing and tuning queries
• Has experience with at least one of: building ingestion pipelines from outside APIs, or modeling data across sources and merging duplicate records
• Has worked on a team with code review

Preferred

• Experience with both ingestion and data modeling
• Experience with row-level security or multi-tenant data
• Has worked at an early-stage company

Interview process

A 20-minute screening call, a paid work sample, then a final conversation with our CEO.