KeyStep

Staff Software Engineer, Query (Optimization)

MongoDB
Alberta; British Columbia; Manitoba; Nova Scotia; Ontario; Quebec
1 day ago
full-time

Skills & Technologies

C++CSystems ProgrammingMongoDBIntegrationInitiativeResearchData Management

Job Description

Join the MongoDB Server Query Optimization team, and help us build a world-class distributed open-source query optimizer. 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, through parsing, optimization and plan selection.

We have a presence across the US and Europe including New York, Dublin, Seattle, Palo Alto, and Chicago. We support office-based and remote work and align projects with convenient work hours for each time zone.

We have tons of interesting problems to solve with a direct impact on users for transactional, time-series, and analytical workloads. The team is endeavoring to systematically rewrite every major component of our optimization and execution systems. We need your help to design and build the heart of a distributed, flexible schema, document database.

Candidate Profile

10+ years of experience in data management systems

Experience with building production-level code with a large user base, robust design structure and rigorous code quality

Degree in Computer Science or similar field, or equivalent practical experience, with strong competencies in data structures, algorithms, and software design/architecture

Experience with large code bases written in C++ or another systems programming language. You'll need to trace down defects, estimate work complexity, and design evolution and integration strategies as we rewrite different components of the system

Passion for the theory and practice of database query engines, as well as hands-on or academic experience in the database domain

Position Expectations

Innovate in the area of flexible schema databases. Help us build a world-class query optimization system

Research state-of-the art query systems to inform our design

Leverage deep knowledge of the strength and weakness of the product and of industry trends to provide technical vision and direction

Set initiative level strate

Company & Role Analysis

JobSeeker+
Likely perks
Private MedicalPension25+ Days HolidayStock OptionsLearning BudgetFlexible Hours
Culture & working style

Neutral 2–4 sentence summary of what working at this company is like, drawn from public reviews and press coverage. Tone, collaboration style, pace, benefits highlights.

Market salary range

£45,000 – £60,000 (Glassdoor, Levels.fyi, 2025)

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