- Developed BigData applications for VTG Markets (9 countries).- Directed the implementation of a new methodology (Agile/UML),- Developed BigData - BI (Business Intelligence) system for 9 markets (in 9 countries) of Viettel Global with capicity of system as 1 TB/day.- Responsible for Big data translation and transformation (ETL) of 10+ million customer data records using BigData technology.- Developed BigData - Data Processing system, the system handled data between GGSN and SGSN with 500MB traffic/ second.- About 8 years of experience in Database Administrator- Experienced with database MySQL, Oracle, MongoDB, MS SQL Server+ Oracle Database Technology 10g/11g/12c/19c+ Oracle Real Application Cluster(RAC) 11g/12c+ Oracle Data Guard (Physical, Logical Standby Database)+ Oracle Enterprise Manager 11g, 12c,13c Cloud Control + Database Backup and Recovery+ Database Migrations+ Database Upgrading+ Database Performance Tuning+ Oracle GoldenGate+ Oracle Audit Vault-Wide range of services around BigData, NoSql, Hadoop including following:* Architecture, Design, Development* Hadoop installation* Bigdata Tuning* Hadoop, HDFS, MapReduce, Hive, Spark, HBase, Kafka development* Log analysis* ETL processing* Data transfers between hadoop and non hadoop systems* Recommendation engines* Hadoop Training.- Successfully designed and developed all system phases, from hardware selection to system architecture to design/coding of initial code modules.- Technology executive leading all aspects of business analysis, development, QA, documentation, and packaging and delivery.- Executed major IT initiatives from concept to completion, cross-functional teams from kick-off to launch and production; collaborated with business partners to ensure delivery met business requirements.

-Skilled in all phases of the software development lifecycle; expert in translating business requirements into technical solutions; and fanatical about quality, usability, security and scalability.***Project Results:- MPS - Service Delivery Platform system: supports complete service life-cycle management, including creation, deployment, provisioning, utilization and withdrawal, charging and operation & maintenance. It's deployed in 10 countries including Vietnam and markets of Viettel Global with 70 millions of subscribers.- Charging Gateway System: providing multi-charging interfaces for all VAS services (200 services) with 20 millions of subscribers. - Mobile Device Management - MDM system: managing devices of 50 million subscribers.- VAAA System: auto detect mobile numbers of 50 million subscribers.

- Implement next-generation network architectures, Voice over IP, and quality of service measures on IP networks.- Detailed troubleshooting and analysis of media signaling protocols, including SIP.- Development of IP-based PBX platforms and custom telephony applications based on Asterisk and other open-source frameworks.- Developing projects involving requirements gathering, project planning, design, development, testing and deployment.- Team management involving resource scheduling, assignment of roles and responsibilities for project teams, project progress analysis, evaluation and reporting.-Meet with customers to determine their needs, gather and document requirements, communicate with customers throughout the development project to manage customer expectations, resolve issues, and provide project status.-Develop project plans, track project execution, manage changes, develop and execute implementation plans. -Coordinate with other internal departments including Quality Assurance, Product Operations, and Production Support.-Responsible for gathering business requirements, writing technical specifications, scoping releases, managing development and release cycles, and coordinating releases with other departments such as Marketing and Quality Assurance. -Wrote project status reports, developed project plans, led product demonstrations, and presented design proposals both internally and to customers.