406,751open jobs
14,106companies
78,682added this week
Browse all
Salary
$77k – $166k per year (Estimated)
Location
In office
Seniority
Senior · 5+ years exp
Overview
Company
Impact
Profile match
MongoDB is an American database company founded in 2007 that built a document-oriented database storing records as flexible JSON-like structures rather than fixed relational tables. Its main commercial product is Atlas, a managed service running the database across the major public clouds with search, vector search, streaming and analytics layered on top, which now supplies the majority of company revenue. Headquartered in New York and listed on Nasdaq, it acquired the embedding model company Voyage AI in 2025 to strengthen its position in retrieval for artificial intelligence applications, and its database remains among the most widely used outside the relational world.

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

About MongoDB

MongoDB is built for change, empowering our customers and our people to innovate at the speed of the market. We have redefined the data platform for the AI era, enabling builders to create, transform, and disrupt industries with software. MongoDB’s unified data platform, the most widely available, globally distributed data platform on the market, helps organizations modernize legacy workloads, embrace innovation, and unleash AI. Our cloud-native platform, MongoDB Atlas, is the only globally distributed, multi-cloud data platform and is available across AWS, Google Cloud, and Microsoft Azure.

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

Our compass at MongoDB is our Leadership Commitment, guiding how and why we make decisions, show up for each other, and win. It’s what makes us MongoDB. 

To drive the personal growth and business impact of our employees, we’re committed to developing 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. Learn more about what it’s like to work at MongoDB, and help us make an impact on the world!

MongoDB is committed to providing any necessary accommodations for individuals with disabilities within our application and interview process. To request an accommodation due to a disability, please inform your recruiter.

MongoDB is an equal opportunities employer.

Req ID: 2273491237

Free account
Stop reading job ads. Get the ones that fit.
One free account turns this page into a shortlist built around your stack, your level and your pay.
Match on every job. Stack, seniority, pay and location, scored against your profile.
406,751 open roles. Read straight off company career pages, refreshed every day.
Unlimited applications. Every one you send is tracked in one place, on-site or on a company board.
3 tailored CVs a month. Rewritten for the exact job you are applying to. Included free.
Create a free account
Free forever. No card. Under a minute.

Your match

How well do you fit this role?
Two answers are enough for a real match. No account needed.
Check my fit
Answers stay in this browser until you create an account.

Recommended for you based on this role

Similar stack
Same company
In your city
$35k per year • In office • Internship • Bachelor's Degree • Freiburg im Breisgau
C++
Java
Node JS
Python
C#
JavaScript
C#
.NET
AI/ML
AI Agents
DevOps
CI/CD
GitLab
Apply
$117k – $258k per year (Estimated) • Equity • Remote • Full-Time • United States
C++
Java
Python
Cybersecurity
Crowdstrike
Apply
$48k – $112k per year (Estimated) • In office • Internship • Master's Degree • Toronto
C++
MATLAB
Python
Apply
$115k – $204k per year (Estimated) • In office • Full-Time • United States
Bash
C++
Python
C++
CMake
DevOps
GitHub
GitHub Actions
Apply
$164k – $307k per year (Estimated) • Remote/Hybrid • Full-Time • 8+ years exp
C++
Assembly
Assembly
WinDbg
DevOps
VMWare
Cybersecurity
Zero Trust
Zscaler
Apply
$120k – $240k per year (Estimated) • Equity • Remote/Hybrid • 5+ years exp • New York
C#
C++
Go
JavaScript
TypeScript
Frontend
React.js
Redux
DevOps
AWS
Azure
GCP
IAM
Cybersecurity
FedRAMP
Apply
$118k – $250k per year (Estimated) • Remote/Hybrid • 3+ years exp • London
DevOps
AWS
Azure
GCP
Apply
Solutions Architect 6 days ago
$75k – $181k per year (Estimated) • In office • 5+ years exp • Bachelor's Degree
C#
C++
Java
Node JS
Python
SQL
JavaScript
Databases
Apache Kafka
Kafka
AI/ML
RAG
DevOps
AWS
Azure
GCP
Kubernetes
Vector
Apply
$155k – $313k per year (Estimated) • Equity • In office • 10+ years exp
DevOps
AWS
Azure
GCP
IAM
Apply
Equity • In office • Contractor • 7+ years exp • Bachelor's Degree • Austin
DevOps
AWS
Azure
GCP
Apply
See all jobs
This is one of many
406,751 more open roles from verified company boards, updated every day.