• Leading the Data Engineer team to make the migration and merge between the organization’s 2 data silos (Oracle and BigQuery) into one centralized data lake for OMC (one of One Mount’s subsidiaries).• Ensuring the timely delivery of high quality data projects through effective users and stakeholders’ expectation management.

- Designed and implemented the data mart for a loyalty account system, including Star Schema data structure with Type 2 Slow Changing Dimension and its ETL pipeline. Successfully reduced amount of time needed for daily processes to 1/4th of the previous system (down to 2 hours from 8 hours).- Designed, implemented a retail data mart and integrated it with current loyalty account system into a centralized data warehouse.- Responsible for maintaining current data warehouse and developing its new features per requests from internal data analysts and data scientists- Technology used: Oracle and a cloud-based data warehouse system as infrastructure and scripting language for ETL pipeline; Python (Airflow) for scheduling and preprocessing data from external sources.

- Advised and assisted with the design and development of the Management Information System (PRMS) for the People’s Credit Fund network- Surveyed and evaluated Co-operative Bank of Vietnam’s IT requirements to advised on strategy that aligned with their Master Plan- Trained members of the MIS team about data warehouse theory and standardsWebsite: https://did-step.com

Responsible for developing ETL solutions for various BI projects at Viettel Group, including ETL solutions for Mobile Prepaid, Mobile Postpaid, ADSL, Landline for 6 markets which Viettel operates in (Vietnam, Laos, Cambodia, Mozambique, Haiti, East Timor). Processed more than 100 data sources from various sources including Customer Care, Online Charging System (OCS) and Value Added Service (VAS) systems with data volume over 5TB per day for over 60 million telecommunication customers.Responsible for training new employees. Wrote a document in Vietnamese as training documentation for BI, Data Warehouse and ETL technology.Role: Team leader, Senior ETL developerTechnologies used: SQL (Oracle, MySQL), Cognos, BIRT reporting engine, Pentaho

Full stack web developer, take part in the development of 1280.com (now banbe.net), a Vietnamese social network, responsible for Group section of the website.Technologies used: PHP - MySQL, Jquery