Skip to content
Updated How AI-exposed are the skills employers are hiring for? See the data →

From the employer's careers site First seen 28 Oct 2026 · Still live on 31 Oct 2026

Senior Software Engineer, Query Execution

MongoDB Dublin Hybrid senior full-time

The employer hasn't listed a salary.

Apply on MongoDB

Description

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 review responsibilities and are independently delivering complex functionality and squashing bugs independently
  • In twelve months, you’re leading the development of a new major feature and are helping to mentor new engineers on the team

Benefits

MongoDB offers a supportive and enriching culture for everyone. From employee affinity groups, to fertility assistance and a generous parental leave policy, we value our employees’ wellbeing and want to support them along every step of their professional and personal journeys.

Skills

Required

Nice to have

  • Rust
  • C
  • M.Sc./Ph.D in database query engines

Ready to apply?

You apply with the employer directly. Their original posting is here: https://job-boards.greenhouse.io/mongodb/jobs/8055471

Apply on MongoDB