Staff Software Engineer, Query at MongoDB

This role is designed for a seasoned expert in database internals. Despite the "Mid-level" tag in the metadata, the requirements specify **10+ years of experience** in data management systems. You should be a C++ specialist comfortable navigating massive, complex codebases and possess a deep academic or professional passion for query engine theory, optimization, and distributed systems. The position offers a high-impact opportunity to help rewrite major components of a world-class database used by 75% of the Fortune 100. The compensation is competitive, ranging from **$159k – $221k CAD** plus equity and robust benefits like 20 weeks of parental leave. While the role is listed as "on-site," the description clarifies a **hybrid model** available across several major Canadian tech hubs. **You might be a good fit if you:** * Have a decade of experience building production-level systems code in **C++**. * Possess deep knowledge of query optimization, vector search, or distributed execution. * Enjoy mentoring other engineers and helping define long-term technical roadmaps (6–18 month horizons). * Want to work on "heart of the database" problems for transactional and analytical workloads.