Senior Software Engineer – Query Optimizer

Are you interested in working in a dynamic and growing international company with a strong Open Source culture and whose products are used by big Internet and other companies all over the world? MariaDB is the fastest growing Open Source database worldwide, with more than 12 million users. We power applications at companies like, Virgin Mobile and Wikipedia, and we partner with companies like Alibaba and Facebook. The company was founded by the team that founded and built MySQL and enjoys unprecedented technical depth for a startup.

Job Description

ClustrixDB is now part of MariaDB, and is solving one of the most difficult open problems in the software database industry today: scaling SQL. We’ve built our own distributed relational database from the ground up. Now we’re looking for smart and motivated folks to join our small team of developers and take this technology to the next level. We 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


You should be someone with 3+ years of experience with query planner development and:

  • 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

What’s in it for you?

Four things that make the Clustrix team a great place to work:

  1. Our team is small, so you get to own significant projects and contribute in a big way to the product.
  2. We have a lot of interesting problems to work on, in a variety of areas.
  3. Our customers love us. We help them do things they could never do with their legacy SQL databases.
  4. We are passionate about making our software work better and faster.

Our customer base is growing, both in number and in size of deployment. Their  clusters keep getting bigger and their workloads more varied, so you will see interesting challenges and solutions in solving those.


Redwood City, CA or Seattle, WA

How To Apply

If you are interested in this position, please submit your application along with resume/CV to MariaDB does not sponsor work visas or relocation

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