Software Engineer 3, Query Integration

Who We Are At MongoDB, we are empowering innovators to create, transform, and disrupt industries by unleashing the power of data. The Query Integration team is at the heart of making MongoDB's data capabilities seamless and accessible. Our mission is to build intuitive, user-facing features on top of our core query engine and integrate it deeply with the broader MongoDB ecosystem. We work on cutting-edge features that power our time-series database , extend analytical language capabilities, and scale our high-growth Atlas Search and Vector Search products. We are a highly collaborative team that values engineering excellence and continuous learning. While our core engine development is in C++, our testing infrastructure relies on JavaScript and Python, making for a dynamic and modern development environment. This role can be based out of our US or Canadian offices, or remotely within the North American region. What You’ll Do As a Mid-Level Software Engineer on the Query Integration team, you will bridge the gap between core database internals and user-facing features. You will: Develop and scale new query capabilities that directly impact our time-series, Atlas Search, and Vector Search products while adding workload telemetry for greater database insights. Contribute high-quality, maintainable code primarily in C++ and gain a deep, working understanding of the MongoDB query engine. Work constructively with peers to design, implement, and support robust technical solutions while giving and receiving meaningful feedback in code reviews. Build comprehensive testing suites in Python/JavaScript and implement diagnostics to help identify and resolve complex query performance problems. What We Look For We welcome dive