Senior Database DBA

Qode•New Jersey, NJ

16h

About The Position

We are seeking a Senior MemSQL / SingleStore Cluster Administrator to own and manage mission-critical, large-scale distributed database platforms. This role requires a pure Database Administrator (DBA) with deep expertise in handling petabyte-scale data, complex distributed clusters, and real-time latency-sensitive workloads. Core Technical Expectations Experience handling petabytes of data ingested every 15 minutes in large-scale environments. Strong expertise managing large MemSQL / SingleStore clusters (multi-node, multi-TB to multi-PB). Deep understanding of data distribution across aggregators and leaf nodes. Expertise in: Partitioning and shard key strategy Data skew mitigation Hot partition resolution Worker node and leaf node optimization Strong table-level knowledge including: Index strategy Thread management Connection pooling Memory limits Query plan optimization Strong understanding of different MemSQL/SingleStore versions and corresponding architectural/feature changes.

Requirements

10+ years of total database engineering/administration experience.
4–5+ years of deep, production-grade experience administering MemSQL/SingleStore clusters at scale.
Strong hands-on experience with: Aggregators & leaf nodes Licensing and memory limits Cluster expansion & partition rebalancing Replication & failover/failback
Proven ability to diagnose: Locking issues Data skew Hot partitions Bad execution plans
Strong Linux system tuning knowledge: CPU/NUMA affinity Disk & I/O optimization Networking ulimits & OS-level tuning
Experience with monitoring & alerting tools: Prometheus / Grafana Datadog Splunk ELK
Strong SQL expertise and scripting (Python/Bash).
Excellent communication skills with ability to lead production calls and explain technical trade-offs clearly.

Nice To Haves

Experience in Cloud/Container environments (AWS/Azure/GCP, Kubernetes) is highly preferred.

Responsibilities

End-to-end ownership of large MemSQL/SingleStore clusters (design, build, upgrade, operate, decommission).
Architect and maintain High Availability (HA) and Disaster Recovery (DR) setups including: Redundancy levels Availability groups Cross-region replication
Plan and execute: Cluster expansion Downsizing Online partition rebalancing Leaf node management with minimal/no downtime
Proactively monitor cluster health, throughput, latency, and capacity; define and maintain SLAs.
Perform advanced performance tuning: Schema design Shard key design Index strategy NUMA and memory tuning Workload management
Implement backup/restore strategies and regularly test DR & failover.
Lead incident response and perform deep root cause analysis.
Enforce database security best practices: Authentication & authorization Encryption Auditing Network controls
Drive automation using scripting (Python/Bash) and Infrastructure as Code.
Maintain documentation, operational runbooks, and standards.
Evaluate new MemSQL/SingleStore features and lead version upgrades and migrations .