Part of a Fortna R&D division which is responsible for involving investigation, prototyping and development of product, tools and new technology that enhance and augment the FortnaWES product suite.My work is focus on FortnaWES solution including:- Design and build the core frameworks that speeds up building lightweight, scalable and high performance backend applications and micro front-end system.- Support other teams in transforming our JavaEE-based legacy system to using new architecture.- Analyze and resolve performance issue of system.- Define concept, technical solution and implement POC of new products from the scratch.

It is small team that was created by me and my friends focusing on out-source area. As a technical leader of team, my focus was on strategy, solution design and problem solving.

I worked for Viettel Group as a Backend and Big-Data Developer responsible for developing tools and system application for analyzing traffic on large network using many technologies like Kafka, Storm, Hadoop, Zookeeper, etc...During this time, I was also responsible for the two large-scale projects:- A system for realtime filtering and blocking spam SMS (Bronze Award in IT World Awards 2016) that handles almost 1,000,000 SMS/minute and successfully block 80-90% spam SMS in the entire carrier network.- A realtime, large-scale storing and analyzing message system using HDFS and Map-Reduce technology that can handles over 1,000,000 messages/second.

I was responsible for developing a messaging application on Android. Besides developing UI, I spent almost time on benchmarking and improving libraries regarding the connection management, photo optimization, battery life optimization.

My responsibility was finding the efficient solution for customers bases on their concepts and requirements. It also included designing architecture of mobile application, the communication model with other service and working as developer in some projects.In addition, I also spent time in research and building a few effective libraries/frameworks to improve development process, optimize UI rendering, battery and improve performance of application.