Workplace
On-site
Employment
Internship
Published
Aug 12, 2026
Closes
No date supplied
The role
MongoDB’s Replication Team builds the infrastructure that enables high availability, fault tolerance, automatic failover, and tunable consistency. As an engineer on the team, you will design and implement distributed-systems features that protect data and keep applications available under demanding operating conditions.
You will work primarily in C++ on core database code, partner with engineers across MongoDB, and help shape features that are central to major MongoDB releases. This is an opportunity to apply distributed-systems fundamentals to a widely used database while solving challenging problems in correctness, performance, and operability.
We're looking to speak with candidates based in New York City for our in-office working model.
What you will do
• Design and implement replication features based on the Raft consensus protocol
• Improve failover behavior, availability, correctness, and performance across the replication system
• Write production-quality C++ and the unit, integration, and system tests needed to demonstrate correctness
• Use JavaScript and Python where appropriate to extend test coverage and validate end-to-end behavior
• Diagnose test failures, investigate bugs, and drive issues through root-cause analysis and resolution
• Measure the performance impact of code changes and prevent or resolve regressions
• Collaborate with partner engineering teams and stakeholders on large, cross-functional initiatives
• Investigate distributed-systems issues raised by customers and Technical Support, communicate findings clearly, and help deliver durable fixes
• Participate in code reviews, design reviews, and technical discussions that improve the quality of the team’s work
• Interview candidates and mentor junior engineers and interns
What you bring
Required
• At least five years of experience programming, debugging, and pe
Requirements
Department: Durable TXs & Availability