Database Administrator

2 weeks ago

Bengaluru Karnataka, India Zzazz Inc Full time

**Key Responsibilities**
- Design, deploy, maintain, and monitor production-grade databases across NoSQL and RDBMS environments.
- Optimize database performance, query execution, and indexing strategies for large-scale datasets.
- Set up and manage replication, sharding, clustering, and backups for **MongoDB** and **Elasticsearch**.
- Configure PostgreSQL with custom parameters for tuning, connection pooling, WAL archiving, and recovery.
- Ensure high availability and disaster recovery strategies are in place and regularly tested.
- Monitor database health using tools like Prometheus/Grafana, Kibana, or custom scripts.
- Implement security best practices including access controls, encryption (TLS at rest/in transit), and auditing.
- Write and maintain automation scripts using Bash, Python, or Ansible for provisioning and maintenance.
- Plan and execute major version upgrades and migrations with mínimal downtime.
- Document configurations, architecture decisions, and standard operating procedures.

**Required Skills & Qualifications**
- 3-5 years of experience as a DBA or similar role managing **MongoDB**, **Elasticsearch**, and **PostgreSQL**.
- Solid understanding of data modeling principles across both NoSQL and SQL paradigms.
- Experience with **replica sets**, **indexes**, and **aggregation pipelines** in MongoDB.
- Expertise in **Elasticsearch** cluster management, index lifecycle policies (ILM), and query DSL.
- Proficiency in managing **PostgreSQL** installations, including roles, extensions (e.g., PostGIS, pg_stat_statements), and vacuuming strategies.
- Familiarity with **Docker**, **Kubernetes**, or other container platforms for DB deployment.
- Experience with infrastructure provisioning tools (e.g., **Ansible**, **Terraform**) is a plus.
- Strong analytical and problem-solving skills with a detail-oriented mindset.
- Comfortable in fast-paced environments with strong time management.

**Preferred Qualifications**
- PostgreSQL certification or equivalent experience.
- MongoDB DBA Certification or similar.
- Experience with **TimescaleDB**, **Redis**, **ClickHouse**, or other database technologies.
- Familiarity with CI/CD pipelines and infrastructure as code (IaC).
- Experience working in cloud platforms like **AWS**, **GCP**, or **DigitalOcean**.

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