Md Budrul Hasan B.

High-performance database architectures, modern Data Lakehouses, and production-ready ETL pipelines built for enterprise speed, scale, and security. I am a Senior Data Engineer & Database Administrator with 16+ years of enterprise IT experience (since 2010). I specialize in designing modern Data Lakehouses (Iceberg, Trino, MinIO), building automated ETL/ELT pipelines (PySpark, Airflow, dbt), and optimizing mission-critical relational and NoSQL databases (Oracle, PostgreSQL, MongoDB, ClickHouse, MySQL, MSSQL). Having managed infrastructure for 27 major enterprise clients, including 20 government and private banks, I combine deep relational and document database internals with modern big data engineering to deliver secure, zero-downtime, and cost-effective data solutions. Core Technical Stack: Databases & Warehousing: Oracle (Exadata, RAC), PostgreSQL, MongoDB, ClickHouse, MySQL, MS SQL Server Data Lakehouse & Big Data: Apache Iceberg, Trino, MinIO, HDFS, Data Lake Architecture Data Engineering & Orchestration: Apache Airflow, PySpark, dbt, Python, Advanced SQL DBA & Performance: Query Optimization, Index Tuning, Database Architecture Design, High Availability (Data Guard, GoldenGate) Data Migration & Security: System Design, Cloud & On-Prem Migrations, Oracle Advanced Security, Thales nShield/PayShield HSMs How I Can Help Your Business: Database Performance Tuning: Eliminate query bottlenecks, optimize document/relational indexing, and tune high-volume database workloads. Data Lakehouse & Infrastructure: Architect open, scalable Data Lakehouses using Apache Iceberg, Trino, and MinIO/HDFS to significantly reduce analytics and storage costs. ETL/ELT Data Pipelines: Design, automate, and monitor production-grade PySpark, Airflow, and dbt workflows for fast, reliable data processing. Seamless Data Migrations: Execute zero-downtime migrations from legacy databases (Oracle, MSSQL, MongoDB) to modern stores, ClickHouse, or Lakehouse architectures. Ready to modernize your data stack or solve a critical performance bottleneck? Click the "Invite" button on the top right or send me a message to discuss your project!