Senior Distributed Systems Engineer, Knowledge Platform

exa • United State

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AI Summary

Own the design and implementation of a high-performance query engine for a massive-scale knowledge graph. Build storage, indexing, and cost-based planning systems across graph, vector, full-text, time-series, and geospatial backends. Requires deep expertise in distributed databases, query optimization, and systems programming in Go, Rust, or C++.

Key Highlights

Greenfield role with massive scope to build foundational query engine components.

Handle hundreds of billions of claims with thousands of queries per second at interactive latency.

Ensure data consistency and correctness across live updates and bulk snapshots.

Key Responsibilities

Own storage and indexing across graph, vector, full-text, time-series, and geospatial backends.

Design cost-based planning and query optimization strategies to select and join retrieval backends.

Optimize system performance to serve thousands of queries per second with low latency and cost.

Manage data consistency during live updates and bulk snapshot ingestion.

Implement end-to-end precision and completeness checks for query results.

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Technical Skills Required

Distributed Systems Query Optimization Systems Programming

Benefits & Perks

Premium healthcare benefits (medical, dental, vision)

Fertility benefits

16 weeks of fully paid parental leave

Monthly wellness stipend

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Nice to Have

Experience with graph databases

Experience combining vector, full-text, time-series, and geospatial retrieval

Experience with compilers, query language design, or cost-based optimizers

Job Description

Exa is an applied AI lab building a search engine unlike the world has ever seen. We build massive-scale infra to crawl the entire web, train state-of-the-art embedding models to process it, and design super high performant vector databases to retrieve over it. We now power search for Cursor, Cognition, HubSpot, and over 400,000 developers and have raised $350m from Lightspeed, Benchmark, and a16z.Our ultimate goal is to build perfect search over all the world's information, far beyond Google. If you want to build massive-scale ML systems that will define the way the new AI world consumes information, this is the place for you.

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