At MongoDB, we are empowering innovators to create, transform, and disrupt industries by unleashing the power of data.
The Query Integration team is at the heart of making MongoDB's data capabilities seamless and accessible. Our mission is to build intuitive, user-facing features on top of our core query engine and integrate it deeply with the broader MongoDB ecosystem. We work on cutting-edge features that power our time-series database, extend analytical language capabilities, and scale our high-growth Atlas Search and Vector Search products.
We are a highly collaborative team that values engineering excellence and continuous learning. While our core engine development is in C++, our testing infrastructure relies on JavaScript and Python, making for a dynamic and modern development environment.
This role can be based out of our US or Canadian offices, or remotely within the North American region.
What You’ll Do
As a Mid-Level Software Engineer on the Query Integration team, you will bridge the gap between core database internals and user-facing features. You will:
- Develop and scale new query capabilities that directly impact our time-series, Atlas Search, and Vector Search products while adding workload telemetry for greater database insights.
- Contribute high-quality, maintainable code primarily in C++ and gain a deep, working understanding of the MongoDB query engine.
- Work constructively with peers to design, implement, and support robust technical solutions while giving and receiving meaningful feedback in code reviews.
- Build comprehensive testing suites in Python/JavaScript and implement diagnostics to help identify and resolve complex query performance problems.
We welcome diverse perspectives and recognize that great engineers come from a variety of backgrounds. If you share our passion for database internals and match most of these points, we want to hear from you:
- 3+ years of experience in computer 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++
- 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
- 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 contributing to the design of major new features and are helping to mentor new engineers on the team
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, Inc. provides equal employment opportunities to all employees and applicants for employment and prohibits discrimination and harassment of any type and makes all hiring decisions without regard to race, color, religion, age, sex, national origin, disability status, genetics, protected veteran status, sexual orientation, gender identity or expression, or any other characteristic protected by federal, state or local laws.
REQ ID: 2273473046
AI is used to review applications based on job-related criteria and does not replace human decision-making. The hiring team decide who moves forward.
MongoDB’s base salary range for this role is posted below. Compensation at the time of offer is unique to each candidate and based on a variety of factors such as skill set, experience, qualifications, and work location. Salary is one part of MongoDB’s total compensation and benefits package. Other benefits for eligible employees may include: equity, participation in the employee stock purchase program, flexible paid time off, 20 weeks fully-paid gender-neutral parental leave, fertility and adoption assistance, Registered Retirement Savings Plan (RRSP) with employer match, mental health counseling, backup child and elder care, and health, dental, and vision benefits offerings. Please note, the base salary range listed below and the benefits in this paragraph are only applicable to candidates based in Canada.
Skills Required
- 3+ years of experience in computer programming
- B.Sc. in Computer Science or similar field, or equivalent practical experience
- Proficiency in C++
- Build comprehensive testing suites in Python
- Build comprehensive testing suites in JavaScript
- Hands-on experience building industrial-strength software
- Solid computer science fundamentals, strong competencies in data structures, algorithms, and software design/architecture
- Experience with large code bases
- Experience in databases and/or data management systems
- Interest in the theory and practice of database query engines
- Hands-on experience with query engines or M.Sc./Ph.D. in the domain
What the Team is Saying
MongoDB Compensation & Benefits Highlights
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Parental & Family Support — Parental leave is substantial and fully paid for new parents, with additional paid flexibility to ease the return to work. Family‑building support reimburses eligible fertility, adoption, and surrogacy expenses up to a lifetime maximum in the U.S.
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Healthcare Strength — Health coverage includes multiple medical, dental, and vision options plus a One Medical membership for employees and dependents. Coverage extends to inclusive services such as gender‑affirmation care and dedicated menopause/low‑testosterone support, alongside mental‑health resources.
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Leave & Time Off Breadth — Flexible PTO and observed company holidays provide meaningful time away from work. Return‑to‑work flexibility following parental leave further broadens overall time‑off support.
MongoDB Insights
What We Do
The database market is big. How big? Well, according to IDC, it’ll reach $153 billion by 2027. And MongoDB is at the forefront of that innovation with thousands of customers across the globe. We empower developers and businesses to build and deploy the applications they want, wherever they want.
Why Work With Us
We are ambitious. We are passionate about creativity. And we believe the best paths are the ones we have yet to forge.
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Employees engage in a combination of remote and on-site work.
MongoDB provides multiple working model options for our employees, including the flexibility to work from home to opportunities for collaboration and social interaction in a MongoDB office.
