Senior Software Engineer for Query Optimizer

Company: HRB
Location: Seattle
Posted on: June 2, 2025

Job Description:

Our client is a community-developed, commercially supported fork of the MySQL relational database management system, making a huge impact on the world.Xpand is the distributed SQL offering of the client and is solving one of the most difficult open problems in the software database industry today: scaling transactional workloads. They've built their own distributed relational database from the ground up and integrated with MariaDB. Now they are looking for smart and motivated folks to join a small team of developers and take this technology to the next level. They work on:

• C codebase with a custom standard library
• Database fundamentals: B-trees, logging, and recovery, MVCC
• A rule-based, cost-based query planner with top-down optimization similar to Cascades Framework
• An MPP, distributed database with unique query planning challenges that are more complicated (and more interesting) than a single node database.QualificationsYou should be someone with 3+ years of experience with query planner development and:
  • An understanding of table statistics and cardinality estimation
  • Familiarity with the top-down query optimization framework
  • Experience with cost modeling
  • Experience with development of analytics features for SQL
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Keywords: HRB, Lakewood , Senior Software Engineer for Query Optimizer, IT / Software / Systems , Seattle, Washington