- Co-founded and led an engineering and product team.- Worked on fintech and banking and AI.- Created an eWallet that enables users to make P2P money transfers via a phone number, bank account, and social network. Technologies used: Java with Spring Framework, MySQL replication, microservices architecture with Docker, and Google Protobuf.- Implemented direct integration with the core banking API of some Vietnam banks for wallet top-ups and withdrawal transactions.- Developed a management platform for transactions management and monitoring.- Created a rule-based chatbot platform for financial use cases, supporting natural language processing for bank transfer, saving account creation, and service payments.- Integrated a system with eCommerce partners for the purchase of products and services on the eWallet app.- Provisioned infrastructure in a data center.

- Built a product team to deploy ride-hailing and food delivery products in Vietnam; coordinated with a regional engineering team to maintain and continuously improve products.- Maintained a data warehouse and developed a new data pipeline which ensured data integrity and accessibility for BI and fraud prevention activities.- Deployed and maintained microservices on Google Compute Engine and Google Kubernetes Engine.- Integrated a system with bank APIs for a money-payout process.- Established IT and information security policies.- Created and maintained real-time monitoring dashboards with Grafana and InfluxDB.

- Advised clients in North America area wanting to build an eCommerce platform on their strategy and development plan.- Architected a high-level system, handled the project scoping, and generated the development timeline based on customer needs.- Traveled and conducted face-to-face meetings with clients in the North American area.- Provided technical support to existing customers.- Maintained relationships with customers.

- Managed a development team of ten engineers in the development of an eCommerce system with 7 million+ SKUs; used PHP, Symfony, MySQL replication, and PHPUnit.- Led a team of five in the development of a CMS for US university sports teams to upload, stream and share videos of their sports games.- Revamped a company's website to support metro design using PHP and Drupal.- Developed websites for clients in different sectors using WordPress and Drupal.- Maintained and supported an eCommerce platform written in PHP/CodeIgniter for a multibrand fashion company in Europe.Technologies: eCommerce, PHP. Symfony, MySQL, Drupal, WordPress

- Developed custom text processors and extractors for a web search engine in Python.- Created a web crawler for blog searches using Python and a thread pool library.- Built a blogging platform with PHP and MySQL based on the Facebook app, enabling users to create blog entries on Facebook.- Improved the blog entries and bloggers ranking with a a PageRank-like algorithm.- Developed a content management system with PHP and Yii framework.Technologies: Python, PHP, Yii, MySQL