Designed and implemented the infrastructure and architecture for a new team using Python, Django, Flask, GCP, Docker, MySQL, and Elasticsearch. Mentored developers to improve code quality and adherence to coding standards. Analyzed and optimized infrastructure to reduce GCP costs. Developed a data centralization project to store and process high-traffic data for alert/dashboard monitoring and reporting.

Led a team of 7 developers to build and maintain 11/32 services; 2/6 main systems. Ensured notification service could process 40-60 million messages per day without downtime Prepared infrastructure for scalability and maintainability of systems.

Worked on a wide range of microservices and ELT systems. Each service connects to the other via Kafka and AΡΙ. Benchmarked and optimized the report and file upload process using Django, resulting in a 30% performance increase. Refactored code and applied design patterns to improve performance and maintainability. Improved the streaming pipeline by enhancing/restructuring the core systems.

Refactored and optimized an old system (Python) that makes it twice as fast. Apply AMQP for scalable systems (PHP). Benchmarked and improved performance for all backend processes in PHP and Python. Good logical thinking when playing with big data (more than 300 million documents). Do Frontend tasks (Laravel 5, AMP, SCSS). Developed a data analytics dashboard using Azure Data Factory for data warehouse (ETL). Built and maintained robust pipelines that are scalable, reliable, and efficient via Docker, ELK and CI/CD (Teamcity). Worked in an agile environment using Scrum.

Dealing with time pressure and the new language, I had released a website to manage insurance on time. I was the key member that connects the server management and multiple live stream servers (autoscaling). Then, Using Chrome Headless to check the performance of the live stream. After the main function was done, I applied for a chat box (using Websocket) and payment. With the Laravel 5 project, I was a solo coder in the team to develop an API server which used to store the orders. On the Laravel 5 project, I applied simple video editor, folder management and bookmark.

In the Symfony 2 project, I was a bug killer. After 2 weeks with dozens of bugs I had killed, I became a member which applied to the feature user's profile. I applied a theme and took note of Magento 2's bugs. I was a key member of the CakePHP 3 project. I implemented the campaign feature with the functional test. Imported 3 million rows of data to MySQL in less than 20 minutes. I maintained the project based on Yii 2.

In the frontend, we used AngularJS. With Laravel 4, we used to manage articles, banners and members. With Elasticsearch, we could increase the searching accuracy. Used Silex to make workers which crawl products from multisite. Used PhantomJS to get data from websites having javascript pagination. Used Zend 2 to manage products having millions of rows.