David Tang

Project: Appradar (https://appradar.com/)

• Worked with product team to support bug fixes and enhanced features
• Built independent services for migration data from MongoDB to PostgreSQL using design pattern Chain-of- responsibility which prevents duplicate code and boosted development speed by 30%
• Worked with Jenkins for deploying new versions every sprint, and Kubernetes for issue monitoring (checking pod status, using port-forwarding to access applications in a Cluster)
• Worked with MongoDB native query and spring data MongoDB to enhance performance by 200%
• Added a monitoring dashboard in Grafana using logQL and Prometheus to debugging by 50
• Reworked applications by using Multithread CyclicBarrier in Java and increased the scheduled Job performance to 50%.

Project: Swiss Ministry of Agriculture (Java 11, PostgreSQL)

• Enhanced end-user performance by 30% for product filtering.
• Detected complex bugs in core API (History management with Javers) which were caused by wrong database type after migration
• Worked with complexity native SQL (All input fields were created and defined by end-user and are dynamic), and Front-end Angular 6
• Developed automated testing system with Selenium and supported QA to reduce testing time by 85%

Project: Digital HEALTH Certificate (Java 11, PostgreSQL) https://www.tixngo.io/healthngo/

• Worked in HL7 (HEALTH document) format
• Worked closely with IOS team on Implementing encryption/decryption and Digital Signature for HEALTH certificate that supports secure patient privacy
• Worked directly with Swiss Manager for new User stories estimation and clarification
• Worked closely with DevOps for development of CI/CD for project and monitoring deployment process
• Support Project: Digital Ticketing, Swiss Boiler Management
• Support Implementing new features and applying SonarLint which increased code quality and development speed up by 50%
• Optimized endpoint performance (SQL optimization, resolved n+1 on Hibernate)
• Analyzed performance tasks and provided multi-thread solutions that increased execution time by 40

Www.fpt-is.com

Project: System for Health Service Dept (Java 8, MongoDB, docker)

• Partnered with design team on microservice architecture using Java 8 and Angular 8
• Completed special tasks, setup and calibrated machinery to meet specific production requirements and meet desired tolerances
• Developed real-time notification service with Kafka, Server-Sent Event with delay time under 2s
• Developed User Management service with Dynamic Role and Permissions
• Reviewed code and debugged errors with SonlarLint and improved performance by 50%
• Worked with project managers for task clarification, and estimation
• Configured, installed, and designed schema on MongoDB with Technical Lead
• Built Oauth2 using spring cloud oauth2 and service register using spring cloud eureka.

www.plantynet.com/

Projects: Filtering System (Java, Mybatis, Jsp, Oracle)

• Analyzed requirements and designed, developed, and implemented software applications
• Performed troubleshooting, diagnostics, and analysis to uncover root malfunctions
• Participated in requirements gathering and design development meetings
• Worked with business users and operations teams to understand business needs and address production questions
• Created and implemented database designs and data models (Oracle)
• Tested programs and databases to identify issues, made necessary modifications and reported to the Korean core development team
• Developed Restful API, SOAP using spring MVC, spring 3
• Developed a Telemarketing system with SMS gateway integration.

Projects: Outsourcing (Actionscript 3.0, PHP 5, MySQL)

• Rapidly prototyped new data processing capabilities to confirm integration feasibility into existing systems
• Game Development based on Actionscript 3.0
• Developed Restaurant e-menu using Actionscript 3.0 and PHP as server-side, MySQL database
• Consulted with network engineering staff to evaluate hardware and software requirements for new system development.

Projects: Jomsocial, Joomla

• Programming in PHP, HTML, CSS
• Tracked hours and expenses for each project
• Worked online with Malaysian customers
• Worked on Joomla component to analyze user web systems and checkout conflict.