Senior Oracle/MongoDB/DynamoDB DBA – Onsite Denver

Tech Mirrors; Denver (CO); On-site; Full time

Job description

Job Title- Oracle DBA

Location- Denver, CO (Onsite)

Long Term Contract

Mandatory Skills
Strong expertise in Oracle Database Administration
MongoDB Administration
Amazon DynamoDB
Strong SQL, PL/SQL, and query optimization skills

Job Description
We are looking for a highly experienced DBA with 10–15 years of experience supporting enterprise-scale databases.

Key Responsibilities:
Administer, maintain, monitor, and support Oracle, MongoDB, and DynamoDB environments
Manage database installations, upgrades, patching, backups, recovery, and replication strategies
Ensure database availability, reliability, performance, and security across production and non-production environments
Design scalable relational and NoSQL database architectures
Create logical and physical data models based on application requirements
Optimize schema design, indexing, partitioning, clustering, and storage configurations
Lead database migration and modernization initiatives from legacy platforms to Oracle, MongoDB, or DynamoDB
Perform schema conversion, data migration, validation, and cutover planning
Analyze and resolve database performance bottlenecks
Tune SQL queries, stored procedures, indexes, and execution plans
Optimize MongoDB collections, aggregations, sharding, and replication
Improve DynamoDB throughput, partition key design, auto scaling, and cost optimization
Configure and maintain HA/DR solutions including Oracle RAC/Data Guard, MongoDB replica sets/sharding, and DynamoDB global tables
Automate database administration tasks using Python, Shell, or PowerShell scripting
Work with AWS cloud services related to databases and infrastructure
Collaborate with developers, architects, DevOps, and security teams to ensure compliance and best practices

Required Experience
10–15 years of DBA experience
Hands-on experience with AWS cloud platform
Strong knowledge of indexing, partitioning, clustering, and sharding concepts
Experience with monitoring tools and database health checks
Experience with migration tools and ETL/data integration processes
Exposure to Infrastructure as Code (IaC) and CI/CD integration is a plus
Excellent communication and stakeholder management skills