# Senior Software Engineer, Replication at MongoDB

- Company: MongoDB
- Status: Open
- Workplace: On-site
- Location: United States
- Level: Senior
- Discipline: Backend
- Employment: Full-time
- Salary: $126K–248K
- Posted: 2026-10-22
- Skills: C++
- Apply: https://www.mongodb.com/careers/job/?gh_jid=8263247

## Description

MongoDB’s Replication Team builds the infrastructure that enables high availability, fault tolerance, automatic failover, and tunable consistency. As a Senior 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 shape features central to major MongoDB releases. This is an opportunity to apply distributed-systems fundamentals to problems in data consistency, recovery time, replication performance, and operability.
 We are looking to speak to candidates who are based near one of our MongoDB office for our hybrid working model.
 What you will do
• Design and implement production features across the replicated data lifecycle
• Improve restore and recovery workflows with attention to recovery time objectives
• Improve replication lag, throughput, and flow control; measure performance and prevent or resolve regressions
• Write production-quality C++ and the unit, integration, and system tests needed to demonstrate its correctness
• Use JavaScript and Python where appropriate to extend test coverage and validate end-to-end behavior
• 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 deliver durable fixes
• Participate in code reviews, design reviews, and technical discussions that improve the quality of the

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