Experience

Professional Experience

August 2024 - May 2025 | Washington DC, USA

Developed comprehensive training methodologies for deep learning models, incorporating adaptive optimization, automated hyperparameter tuning and learning rate scheduling
Achieved 56% directional prediction accuracy in forex market forecasting, translating into a 17% portfolio return over two years
Implemented a scalable data analysis pipeline for credit card fraud detection using Apache Spark
Leveraged both supervised and unsupervised learning techniques for detecting fraudulent patterns, achieving ROC AUC Score up to 0.965

January 2019 - April 2023 | Tokyo, Japan

Implemented and maintained core company products, including reservation and payment systems, handling approximately 5,000 transactions per month
Developed company RESTful APIs and service APIs for validation and reservation management
Automated ETL processes and sustained data quality, reducing business team manual workload by 75%
Led a team of 6 developers as an Agile Project Manager to develop a recommendation system with 5% CTR
Developed back-end functions and implemented load balancing for COVID-19 vaccination reservation system funded by Japan’s Ministry of Defense

June 2017 - June 2018 | Hanoi, Vietnam

Led a 4-member team to build a film review forum using Ruby on Rails
Collaborated with senior developers to develop AI hybrid chatbot using NLP, Language Models and speech recognition
Implemented CI/CD pipeline to deploy code into staging and production environments
Wrote custom scripts to enforce coding naming conventions based on project requirements

January 2017 - June 2017 | Hanoi, Vietnam

Developed responsive, high-performance web applications using React, jQuery, Bootstrap, and HTML5/CSS3
Designed and migrated legacy database to a framework ORM, ensuring data integrity
Integrated Redis for caching search results, improving search speed by 70%