MongoDB Performance Engineer/ 105394-1/On-site Location: Austin, TX/Sunnyvale, CA Duration: 6 months Onsite role 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. Strong experience with tuning of specific clusters, queries, indexes and schemas 9. Good experience designing sharding strategy and shard keys; plans resharding and zone strategy 10. Strong experience operating and monitoring existing sharded clusters; runs balancer, fixes hot chunks Nice To Have Skills: 1. MongoDB certification 2. Kubernetes operator experience for stateful MongoDB; Infrastructure-as-Code (Terraform/Ansible). Technical/Functional Skills: MongoDB Performance Engineer to own the throughput, latency, scalability and operational reliability of MongoDB landscape. This is a hands-on database engineering role — not an application-developer role. The engineer is accountable for making MongoDB fast, predictable and cost-efficient at scale. Performance engineering (Primary) • Profile and optimize slow queries and aggregation pipelines using explain plans, the database profiler, and log analysis. • Design, review and rationalize indexes (compound, partial, wildcard, Time To Live (TTL), text, geospatial) applying the Equality, Sort, Range (ESR) rule; eliminate unused and redundant indexes that inflate write cost and cache pressure. • Tune the WiredTiger storage engine: internal cache sizing, eviction and checkpoint behavior, compression, and journaling, balanced against filesystem cache. Operations & reliability • Operate and scale sharded clusters: balancer management, chunk/range distribution, jumbo-chunk remediation, and (on modern versions) resharding. • Own backup/restore and Point-In-Time Recovery (PITR) strategy, plus rolling upgrades and patching with zero or minimal downtime. Infrastructure, OS & platform • Right-size EC2 instances and EBS volumes (Input/Output Operations Per Second (IOPS) and throughput provisioning); on Kubernetes, own StatefulSet storage class, resource requests/limits, anti-affinity, and cache sizing against container memory limits. Partner w ith application teams on data modeling; review schema changes; publish standards, runbooks and capacity guidance. Skills: Digital : Mongo DB~Performance Engineering Experience Required: 8-10 Kiran Kumar kiran@keybusinessglobal.com Key Business Solutions, Inc. || Office: 916 222 3188|| Fax: 916 646 2081 || Email: kiran@keybusinessglobal.com : : : APPLY NOW 🔔 Get our daily C2C jobs / Hotlist notifications on WHATSAPP TELEGRAM LINKEDIN Related