DATABASES-Architecture & Design-Mongo DB

What we currently use

• We build backend services with Java, Spring Boot, Web Services, Mongo DB
• We integrate with existing core Java Cargo applications via REST APIs
• We build frontends with Angular and Ionic framework for mobile apps
• We deploy to Linux servers, private datacenters, AWS, using Ansible & Maven
• We do continuous integration with Gitlab/Bamboo
• We use Scrum to organize ourselves

What we expect from you

• Bachelor's Degree in Information Technology, Computer Science, Computer Engineering, or equivalent
• Proven experience as a MongoDB DBA or similar role (4+ years recommended)
• Strong understanding of MongoDB architecture, including sharding, replication, and indexing
• Experience working with MongoDB Atlas or self-managed clusters
• Proficiency with Linux systems and shell scripting
• Familiarity with monitoring tools and performance tuning techniques
• Experience with backup and disaster recovery processes
• Review the current Debezium deployment architecture, including Oracle connector configuration, Kafka integration, and downstream consumers.
• Analyze Oracle database setup for CDC compatibility (e.g., redo log configuration, supplemental logging, privileges).
• Evaluate connector performance, lag, and error handling mechanisms.
• Identify bottlenecks, misconfigurations, or anti-patterns in the current implementation.
• Provide a detailed report with findings, best practices, and actionable recommendations.
• Optionally, support implementation of recommended changes and performance tuning.

What we require from you

• 4+ years of experience as a MongoDB DBA in production environments
• Deep expertise in MongoDB architecture, including replication, sharding, backup, and recovery
• Strong hands-on experience with Debezium, especially the Oracle connector (LogMiner).
• Deep understanding of Oracle internals relevant to CDC: redo logs, SCNs, archive log mode, supplemental logging.
• Proficiency with Apache Kafka and Kafka ecosystem tools.
• Experience with monitoring and debugging Debezium connectors in production environments.
• Ability to analyze logs, metrics, and connector configurations to identify root causes of issues.
• Strong documentation and communication skills for delivering technical assessments.

What could give you an edge

• MongoDB Certified DBA Associate or higher.
• Exposure to containerized environments (Docker, Kubernetes) and Infrastructure as Code (Terraform, etc.).
• RedHat Certifications concerning Kafka or Debezium