I work for Bangladesh's biggest Telecommunication company Grameenphone Ltd as a Senior Data Warehouse Engineer. Responsibilities:• Data Warehouse Management: Designed, implemented, and maintained data warehouse structures using Oracle Database 19c, ensuring optimal performance, scalability, and storage efficiency.• ETL Development with ODI 12c: Developed and managed ETL processes with Oracle Data Integrator (ODI), streamlining data integration workflows to support seamless data movement from multiple sources.• SQL and PL/SQL Programming: Wrote and optimized complex SQL queries and PL/SQL scripts for data manipulation, analysis, and transformation, enabling efficient and accurate reporting.• Automation with Bash on Linux: Leveraged Bash scripting on Linux to automate routine tasks, including data loading, error handling, and process monitoring, reducing manual effort and improving reliability.• Data Modeling and Schema Design: Created efficient data models, using star and snowflake schemas to enhance data storage and retrieval aligned with business intelligence needs.• Performance Tuning: Regularly tuned ETL processes, SQL queries, and database structures to boost processing speeds and resource utilization for large-scale operations.• Data Quality and Integrity: Implemented data validation and cleansing protocols to ensure high data quality, accuracy, and consistency across the data warehouse.• Cross-functional Collaboration: Worked closely with business intelligence, finance, and operations teams to fulfill data requirements, supporting data-driven decision-making.• System Monitoring and Troubleshooting: Oversaw data warehouse health through system monitoring and issue resolution, ensuring data availability, integrity, and security.

I am working for Bangladesh's biggest Telecommunication company GrameenPhone Ltd inContextual Marketing Platform (CMP) as a System Engineer.Responsibilities:• Develop scripts and automate repetitive tasks using BASH Shell• Writing and Tuning SQL query (Oracle DB)• Execute various Linux commands for daily operation• Investigate and resolve application-related issues reported by end-users or automated monitoring systems.• Analyze logs, error messages, and other data to identify the root cause of problems• Support end-users and customers, helping them with application-related queries and issues.• Communicate effectively with end-users, development teams, and other stakeholders and provide timely resolutions• Manage and prioritize incidents based on their impact on business operations.• Work on resolving incidents within agreed-upon service level agreements (SLAs).• Work closely with other support teams, such as infrastructure and network support, to address cross-functional issues.• Work with third-party vendors for support and issue resolution, if applicable.• Maintain comprehensive documentation for applications, including configurations, troubleshooting guides, and known issues.• Keep documentation up-to-date based on changes and improvements.• Participate in on-call rotations to provide 24/7 support for critical issues.

• Write and optimize SQL queries for data retrieval, modification, and deletion.• Develop and maintain stored procedures, functions, triggers, and packages using PL/SQL.• Ensure efficient and performance-tuned database code.• Developing Oracle Forms and Report (11g) for ERP Software• Monitor and recommend changes if required to all PL/SQL packages and design/create stored procedures• Collaborate with application developers and system administrators to design and implement efficient and scalable Oracle database solutions.• Develop and maintain database architecture standards.• Identify and resolve performance issues through query optimization, indexing• Collaborate with business analysts and stakeholders to understand data requirements.• Stay updated on Oracle technologies and industry best practices.• Attend relevant training sessions and pursue certifications to enhance skills

• Perform Development Using Structured Query Language (SQL) Procedural Language Extension To SQL (PL/SQL)• Create or update stored procedures, triggers, and other DML/DDL• Create and maintain a database design document, to include generating and maintaining ERD diagrams and data dictionary.• Developing Oracle Forms and Report (10g) for Oracle E-Business Suite R12• Create and maintain and Tuning SQL queries• Monitor and recommend a change if required to all• PL/SQL packages and design/create stored procedures• Developing and Maintaining HRMS Software• Develop VAT Solution

• Developing Oracle Forms and Report (10g)• Writing Stored procedure and implement new requirement with PL/SQL• Tuning SQL• Develop HRMS Solution• Create and maintain a database design document, to include generating and maintaining ERD diagrams and data dictionary.• Create or update stored procedures, triggers, and other DML/DDL.