Staff Software Engineer, Query (Optimization) at MongoDB

This role is designed for a heavyweight system architect with 10+ years of experience in the internals of data management systems. You aren't just writing queries; you are building the engine that executes them. The ideal candidate has deep expertise in C++ and a sophisticated understanding of query optimization theory, parsing, and execution strategies. While the listing mentions "Mid-level," the 10-year requirement and expectations for setting technical vision suggest this is a high-level individual contributor role. The position offers a substantial salary range ($151k - $297k) and the stability of a world-class open-source project. You’ll have the rare opportunity to work on a systematic rewrite of a distributed system used by 75% of the Fortune 100. Despite the "On-site" label in some fields, the description clarifies that remote work is supported across North America, and the benefits package is top-tier, featuring 20 weeks of parental leave and stock options. **You might be a good fit if you:** * Have a deep obsession with database theory and have worked extensively with C++ in large, high-scale codebases. * Are comfortable navigating the complexities of distributed systems and "flexible schema" (NoSQL) architecture. * Enjoy "sweating the 1%" of performance optimization and want to influence a long-term technical roadmap. * Want to mentor other engineers while remaining hands-on with research and implementation.