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Software Engineer 3

Join MongoDB's Server Query team to enhance a distributed open source query engine in a hybrid work environment.

Location
Dublin, Ireland
Compensation
Not disclosed
Level
mid
Type
full time · Hybrid

Posted by employer 13 hours ago

First seen on Joblaze 46 minutes ago

Last verified on the company career page 46 minutes ago

Skills & Technologies

What you'll build

  • Understand and improve current functionality of the MongoDB query engine
  • Identify, design, implement, test, and support new features
  • Work with other engineers to coordinate changes in a large code base
  • Coordinate changes with other teams

Must have

  • 3+ years of experience in data intensive environments
  • Hands-on experience building industrial-strength software
  • Solid computer science fundamentals
  • Experience with large code bases
  • B.Sc in Computer Science or similar field

Nice to have

  • Experience in developing database systems
  • Interest in the theory and practice of database query engines

Practical constraints

  • Candidates must be based in Dublin

Requirements

Experience
3+ years
Education
Bachelor's degree

Not disclosed in this posting: compensation, visa sponsorship.

Benefits

Remote Work Parental Leave

Joblaze summary

In this role, the Software Engineer 3 will focus on enhancing the MongoDB query engine, tackling tasks from query parsing to execution. Candidates should have a solid foundation in computer science, experience with large code bases, and ideally some background in database systems. This position is suited for engineers with over three years of experience in data-intensive environments who are eager to contribute to a collaborative team. MongoDB's global presence and hybrid work model offer a dynamic setting for tackling complex data processing challenges.

Joblaze insights

  • Listed today — first seen on Joblaze October 24, 2026. Last confirmed on MongoDB's careers page October 24, 2026.
  • This exact title is also open at 5 other locations at MongoDB: Gurugram, Gurugram, Sydney, Gurugram, Gurugram.

Quick facts

Is the Software Engineer 3 role remote?
It's hybrid — MongoDB expects some on-site time in Dublin, Ireland.
How much experience is required?
At least 3 years of relevant experience for this Software Engineer 3 role.
Where is the role based?
MongoDB is hiring for this position in Dublin, Ireland.
What's the tech stack?
Joblaze extracted these technologies from the posting: MongoDB, database.
What seniority level is this role?
MongoDB targets mid-level candidates for this position.
Is this full-time or contract?
Full-time for this Software Engineer 3 role at MongoDB.

From the original posting

Join the MongoDB Server Query team, and help us build a world-class distributed open source query engine. Our team plays a crucial role in the experience and performance of data processing. We are responsible for the MongoDB Query Language and the lifecycle of each query, from parsing to optimization to plan selection and finally execution. This also includes our geospatial search and update subsystems.

Our global team is growing fast. In North America, we have a presence across the US and Canada including New York, West Coast, Toronto. In Europe, we have a presence in Dublin, Germany, France, Netherlands, UK, Bulgaria, Spain and Italy currently. We support office-based and remote work and align projects with convenient work hours.

We have tons of interesting problems to solve with direct impact on users for transactional, time-series and analytical workloads. We need your help to design and build the heart of a distributed, flexible schema, document database.

We are looking to speak to candidates who are based in Dublin for our hybrid working model.

Candidate Profile

  • 3+ years of experience in data intensive environments
  • 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
  • B.Sc in Computer Science or similar field, or equivalent practical experience
  • Experience in developing database systems is a plus
  • Interest in the theory and practice of database query engines. Hands-on experience or M.Sc./Ph.D in the domain is a plus

Position Expectations

  • Understand and improve current functionality of the MongoDB query engine
  • 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 with other engineers to coordinate seamless changes in a feature-rich, large code base
  • Work with other teams including client drivers, cloud services, enterprise tools, support, consulting, education, and marketing to coordinate changes or contribute to their projects

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 involved in reviewing the design for new features
  • In twelve months, you’re making significant contributions to the development of a new major features

With offices worldwide and over 67,000 customers, including AI-native startups and approximately 75% of the Fortune 100, relying on MongoDB for their most important applications, we’re powering the next era of software.

MongoDB is an equal opportunities employer.

Req ID: 3273583758

Standard company text repeated across MongoDB's postings is omitted here.

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