# Software Engineer, Knowledge Systems

**Company:** [Exa](https://hotfix.jobs/companies/exa)
**Location:** San Francisco, CA
**Role:** Backend Engineering
**Salary:** $180k – $350k/yr
**Experience:** 5+ years
**Skills:** Distributed Systems, Backend Systems, Data Pipelines, Petabyte-Scale Data Processing, Graph Traversal, Entity Resolution, Data Quality, Truth Discovery, Query Languages, Knowledge Graphs
**Posted:** 2026-06-14

> Build systems for extracting, connecting, retrieving, and reasoning over knowledge from the web to enable AI agents to answer questions with precision. Requires experience with complex distributed backend systems and petabyte-scale data pipelines.

## Job Description

## Responsibilities
- Build systems that understand what is true about the world
- Extract, connect, retrieve, and reason over knowledge from the web and beyond
- Enable AI agents to answer questions with unprecedented precision and completeness

## Requirements
- Experience building and maintaining complex distributed backend systems
- Experience building data pipelines that process petabytes of documents, metadata, and unstructured data
- Comfortable optimizing systems for correctness, reliability, and scale
- Deep care about data quality and finding high-quality information

## Nice-to-Haves
- Experience building systems involving graph traversal, entity resolution, data quality, or truth discovery

## Example Projects
- Build a system that can answer every factual question about every person in the world
- Design a new query language for searching, traversing, and reasoning over billions of facts

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**Apply:** https://hotfix.jobs/jobs/afb75fbb-e379-420c-99a7-1eb6f7155291
**Canonical:** https://hotfix.jobs/jobs/afb75fbb-e379-420c-99a7-1eb6f7155291