Bünyamin Önüm

Data Platform Engineer (Via Nubes Bilişim a Ş) @Akbank

İstanbul, TR

Platform Modernization & Architecture:Providing ongoing support for the migration of enterprise Kafka clusters from ZooKeeper to KRaft architecture, ensuring zero downtime.Configured and managed 8-node KSQLDB cluster for real-time data processingUpgraded Kafka brokers to version 7.9 with enhanced security and performance featuresPerformance Engineering:Improved Kafka producer throughput significantly to through configuration tuningResolved KSQLDB memory allocation issues by implementing JEMalloc memory allocator, stabilizing cluster operations in Pull Query scenariosContributed to data processing pipeline optimization for financial monitoring systemsInfrastructure & Operations:Designed and implemented comprehensive Health Check documentation and Troubleshooting guidesBuilt proactive monitoring dashboards in Grafana with automated alertingExecuted advanced data recovery scenarios involving specific partition/offset managementAutomated KSQLDB query deployment through Jenkins/Jira integrationDeveloped a Jenkins-triggered scripting solution for full export/import of ksqlDB queries to enable fast recovery and automated execution in disaster recovery scenarios.