← All roles

Software Engineer, Query Execution

MongoDB
Apply on company site
Hybrid (Bulgaria)full-timePosted 4d ago

About the role

Software engineer role on MongoDB's Query Execution Team focused on developing a high performing, reliable, and modular distributed query system. Responsibilities include implementing execution algorithms, adding query language features, tuning performance, and ensuring robustness for customer workloads. Role can be based remotely in Bulgaria.

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 programmingData structures and algorithmsCode reviews
Nice to have:Distributed query engines
Last updated Oct 22, 2026. Interested? Apply on the company site.
MongoDB logo

About MongoDB

The World’s Leading Modern Database

Get your ideas to market faster with a flexible, AI-ready database. MongoDB makes working with data easy.

DatabaseAIUnstructured DataStructured DataRecommendation enginesQ&A systemsAnomaly detectionGen AI
Company profileWebsite

More open roles at MongoDB