Staff Software Engineer, Query
MongoDBCalgary; Edmonton; Montreal; Ontario; Toronto; VancouverPosted 24 February 2026
Job Description
<p>Join the MongoDB Server Query Integration team, and help us build a world-class distributed open-source database. Our team plays a crucial role in the experience and performance of data processing. We are responsible for building user-facing features on top of the core query engine and helping to integrate query with other products in the MongoDB ecosystem. This includes enhancing our time-series product, extending language support for analytics, helping grow our Atlas Search and Vector Search products with database support and adding workload telemetry to provide greater insight into how our database is used.</p>
<p>We have tons of interesting problems to solve with a direct impact on users for transactional, time-series, lexical and vector search and analytical workloads. The team is endeavoring to systematically rewrite every major component of our optimization and execution systems. We need your help to design and build the heart of a distributed, flexible schema, document database.</p>
<p>We are looking to speak to candidates who are based in the United States or Canada for our hybrid working model.</p>
<h3>Candidate Profile</h3>
<ul>
<li>10+ years of experience in data management systems</li>
<li>Experience with building production-level code with a large user base, robust design structure and rigorous code quality</li>
<li>Degree in Computer Science or similar field, or equivalent practical experience, with strong competencies in data structures, algorithms, and software design/architecture</li>
<li>Experience with large code bases written in C++ or another systems programming language. You'll need to trace down defects, estimate work complexity, and design evolution and integration strategies as we rewrite different components of the system</li>
<li>Passion for the theory and practice of database query engines, as well as hands-on or academic experience in the database domain</li>
</ul>
<h3>Position Expectations</h3>
<ul>
<li>Be directly responsible for delivering on goals which span a 6-18 month timeframe</li>
<li>Play a key role in defining the roadmap for the next 12 months</li>
<li>Write well tested, production-ready code in C++ (our test infrastructure also leverages Python and Javascript)</li>
<li>Research state-of-the art query systems to inform our design</li>
<li>Leverage deep knowledge of the strength and weakness of the product and of industry trends to provide technical vision and direction</li>
<li>Advise management on decisions related to roadmap, processes, architecture and design</li>
<li>Collaborate with stakeholders and engineering teams across the company to jointly work on large initiatives</li>
<li>Influence and grow team members through active mentoring, coaching and leading by example</li>
<li>Help cultivate a strong talent bench through interviewing, mentoring and knowledge sharing</li>
</ul>
<h3>Success Measures</h3>
<ul>
<li>In three months you’ll have contributed to the development of a project slated for the next major version, as well as fixed a few bugs in a minor version of our latest stable release series; You'll have learned about MongoDB's project lifecycle, and our long-term goals for the system</li>
<li>In six months, you’ll have taken on code review responsibilities and are playing an active role in drafting and reviewing the design for new features; You have expanded the team's horizons by presenting a favorite paper or system architecture related to query systems</li>
<li>In twelve months, on the basis of your extensive past experience in the query space, you have contributed to the long-term technical roadmap of the MongoDB Query team</li>
</ul>
<h3>About MongoDB</h3>
<p>MongoDB is built for change, empowering our customers and our people to innovate at the speed of the market. We have redefined the database for the AI era, enabling innovators to create, transform, and disrupt industries with software. MongoDB’s unified database platform—the most widely available, globally dis ... (truncated, view full listing at source)
Apply Now
Direct link to company career page
More jobs at MongoDB
See all →More JavaScript jobs
See all →Intermediate Software Developer, Full Stack
Hootsuite · Vancouver, British Columbia, Canada
Sr. Backend Software Engineer, Fraud Risk Platform
Navan · Palo Alto, CA or San Francisco, CA
Sr. Backend Software Engineer, Fraud Risk Platform
Navan · Dallas, TX
Développeur(se) Full-Stack Sénior, Unity Ads SDK / Senior Full-Stack Developer, Unity Ads SDK
Unity · Montreal, Canada