Software Engineer 3 – Query Optimization

MongoDB is hiring a Software Engineer 3 – Query Optimization in Atlanta, Fulton County, US. This role focuses on enhancing the distributed open‑source query engine that powers MongoDB’s data processing performance.

Key Responsibilities

• Design, implement, and maintain components of the MongoDB Query Language pipeline, from parsing through optimization to plan selection and execution.
• Improve query performance across distributed environments, including geospatial search and update subsystems.
• Collaborate with a global engineering team to define roadmap, set performance targets, and deliver high‑quality code.
• Analyze real‑world query workloads, develop benchmarks, and drive continuous profiling and tuning.
• Participate in code reviews, testing strategies, and incident response for query‑related issues.

Required Qualifications

• Bachelor’s or higher in Computer Science, Engineering, or related field; 5+ years of professional software development experience.
• Strong proficiency in C++ and systems programming; familiarity with Rust or Go is a plus.
• Deep understanding of database internals, query planning, and optimization techniques.
• Experience with distributed systems, concurrency, and low‑latency networking.
• Proven ability to debug complex performance problems and write scalable, maintainable code.

Preferred Experience

• Prior work on database engines, query optimizers, or similar data‑intensive platforms.
• Knowledge of geospatial indexing and search algorithms.
• Familiarity with open‑source contribution workflows and community engagement.

Compensation & Benefits

Salary: $154,589.77 annually. MongoDB offers comprehensive health plans, 401(k) matching, generous paid time off, professional development resources, and an inclusive, hybrid‑work environment.

Frequently Asked Questions

What does a Query Optimization Engineer do at MongoDB?

You design and improve the query processing pipeline, from parsing to execution, ensuring fast, reliable data retrieval across distributed clusters.

What technical skills are required for this role?

Strong C++ expertise, deep knowledge of database internals, experience with distributed systems, and the ability to profile and tune query performance.

Is remote work possible for this position?

MongoDB offers a hybrid work model, allowing flexibility to work from the Atlanta office and remotely as needed.