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Software Engineer, Query Execution

MongoDB· Query Execution Team
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Hybrid (Denmark)full-timePosted 5d ago

About the role

Software engineers on the MongoDB Query Execution Team develop a high performing, reliable, and modular distributed query system. The role involves implementing and maintaining execution algorithms, adding query language features, tuning performance, and supporting critical customer workloads. Role is based remotely in Denmark.

Responsibilities

  • 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

Qualifications

  • 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

Skills

Required:C++Systems programmingAlgorithms and data structures
Nice to have:Database/query engine knowledge

Benefits

  • Inclusive culture and growth opportunities
  • Supportive and enriching culture for everyone
  • Accommodation for individuals with disabilities during application and interview process
  • Parental leave policy and fertility assistance (referenced benefits)
Last updated Oct 22, 2026. Interested? Apply on the company site.
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