Primary record

Senior Software Engineer, Query Execution

MongoDB Indexed employerIreland
Source-hosted applyChecked 1h agoFull-Time
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Workplace

remote

Employment

Full-Time

Published

Aug 11, 2026

Closes

No date supplied

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.Sc in Computer Science or similar field, or equivalent practical experience

• Interest in the theory and practice of database query engines. Hands-on experience or M.Sc./Ph.D in the domain is a plus

Success Measures

• 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

• In six months, you’ll have taken on code re

Requirements

Department: Query