
Senior Software Engineer, Query Execution
MongoDB · Ireland
Evidence
MongoDB is on the Irish DETE permits list. The posting doesn’t mention visas.
Sponsor register
Irish DETE list of companies issued employment permits in 2026
Listed as MongoDB Limited. 41 permits issued so far in 2026. Snapshot 26 Oct 2026.
Still open
Seen on the job board
First seen 26 Oct 2026. We check every day and remove closed roles.
Where you apply
mongodb.com
MongoDB’s job board.
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About the role
The MongoDB Query Execution Team is hiring software engineers who want to join us in developing a high performing, reliable and modular distributed query system. Our engineers work on implementing and maintaining execution algorithms, building new query language features, tuning database performance, and more to power our customers' critical workloads.
This role can be based out of our Dublin office or remotely in Ireland. Relocation can be supported. Position Expectations • Understand and improve current functionality of the MongoDB query engine • Contribute high quality C++ code and give and solicit feedback in code reviews • Identify, design, implement, test, and support new features related to query performance and robustness, query language enhancements, diagnostics for query performance problems, and integration with other products and tools • Work constructively with peers to deliver excellent technical solutions Candidate Profile • 5+ years of experience in systems programming • Experience in databases and/or data management systems is a huge plus, but not a requirement • 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, preferably in C++, C, Rust or a similar compiled language • B.