What are the responsibilities and job description for the Sr MongoDB Performance Engineer position at Purple Drive Technologies LLC?
Role Descriptions: Must Have Skills: 1. Expert in MongoDB 2. Strong experience in Performance tuning 3. Fluent in the aggregation framework, indexing strategy, and read/write/read-concern semantics. 4. Strong explain-plan and profiler-driven query optimization 5. WiredTiger internals: cache, eviction, checkpoints, journal, compression, document-level concurrency. 6. Replication and sharding operations at scale, including shard-key design trade-offs. 7. Scripting for automation - Python 8