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Software Engineer 3, Query Execution

MongoDB, Inc. - Dublin

Posted Mar 13, 2026

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About this role

Software Engineer 3, Query Execution Dublin Join the MongoDB Server Query team, and help us build a world-class distributed open source query engine. Our team plays a crucial role in the experience and performance of data processing. We are responsible for the MongoDB Query Language and the lifecycle of each query, from parsing to optimization to plan selection and finally execution. This also includes our geospatial search and update subsystems. Our global team is growing fast. In North America, we have a presence across the US and Canada including New York, West Coast, Toronto. In Europe, we have a presence in Dublin, Germany, France, Netherlands, UK, Bulgaria, Spain and Italy currently. We support office-based and remote work and align projects with convenient work hours for each time-zone. We have tons of interesting problems to solve with direct impact on users for transactional, time-series and analytical workloads. We need your help to design and build the heart of a distributed, flexible schema, document database. We are looking to speak to candidates who are based in Dublin for our hybrid working model. Candidate Profile - 3+ years of experience in data intensive environments - Hands-on experience building industrial-strength software - Solid computer science fundamentals, with strong competencies in data structures, algorithms, and software design/architecture - Experience with large code bases - B.Sc in Computer Science or similar field, or equivalent practical experience - Experience in C++ and in developing database systems is a plus - Interest in the theory and practice of

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