Dewey Duc - Senior Java Developer

Dewey Duc

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Dewey Duc

Gender

Male

Main expertise

Java JavaScript Spring Spring Boot Angular AngularJS React.js React Native Back-end Full-stack Front-end REST API

Introduction

Dewey Duc possesses 6 years of experience in Java development focused on project maintenance, actively contributing to a variety of projects in enterprise and e-government solutions. With expertise in Java and JavaScript programming, object-oriented programming, and design patterns, he is proficient in utilizing Java frameworks such as Spring Boot and Spring Cloud, as well as JavaScript frameworks like React.js and AngularJS. He is skilled in working with REST APIs and message queues and in creating technical documents, including use case diagrams, state diagrams, and ER diagrams. Dewey collaborates effectively with Product Owners and Business Analysts to define and refine user requirements and demonstrates the ability to work under high pressure while continuously self-learning new technologies.

Project list

EIS - Emergency Incident Support - Japan

Developed an application to assist end-users when involved in car accidents or when encountering fires in their homes. The application efficiently locates and alerts the nearest police departments, hospitals, and fire brigades for a timely response. Developed RESTful APIs for web applications to manage incoming rescue signals, and facilitate communication with nearby emergency services. Integrated Google SDK for displaying maps and routing emergency support units.

Setup libraries and foundations for the source code. Update services to handle signal reception, provide real-time updates for the admin, and manage notifications for multiple clients. Write unit tests using Mock for function verification and perform regression testing; debug and enhance existing code. Conduct meetings with clients to understand requirements and propose solutions.

Technologies: Spring Boot, Spring Cloud, Dynamodb, AWS, Reactjs

Dkatalis Project - Bulk Payments Feature - Philippines

The project aims to provide corporate clients with the ability to create, review, and approve or execute bulk payment instructions by uploading a file with the necessary transfer information. Upon completion of the transaction execution, a report detailing the outcomes of each transaction is generated, aiding in reconciliation processes due to possible transaction failures. Additionally, the project involves developing a RESTful API for a web application to manage incoming requests, interact with third-party services, and build a batch service responsible for handling input and output files.

Implement new functionality for bulk payments. Update services related to money movement, rail limitations, and fees. Write unit tests using Mock to verify functions and conduct regression tests. Fix bugs and enhance existing code.

Technologies: Spring Boot, Spring Cloud, Spring batch, Kafka, PostgreSQL, GCP, Redis, ReactJs

Calista Logistics Platform - Singapore

Developed a chain orchestration platform that aids in coordinating supply chain activities such as freight booking, logistics, trade finance, and trade insurance. Worked on developing RESTful APIs for the web application, processing incoming requests, and interacting with third-party services. Designed a batch service to handle input/output files efficiently.

Implement new functions for batch services to generate and read files for third-party services. Update services related to freight booking, shipping instructions, and forward hubbing. Write unit tests using mock frameworks for function testing and conduct regression tests. Fix bugs and enhance existing code.

Technologies: Spring Boot, Spring Batch

Financial Management - Fraud Detection System - England, Malaysia

Developed a low-code development platform enabling users to create new data types, rules, and workflows without requiring coding. Developed RESTful API for a web application to manage incoming requests, interface with third-party services, and implement event-driven microservice architecture.

Implement multi-tenant functions, such as creating organizations, schemas, and related components for new organizations. Update workflow functions, including creating databases and rules, and retrieving data. Write unit tests using the Spock framework to test functions and run regression tests; fix bugs and enhance existing code. Implement a user interface built on top that allows users to manage their business independently.

Technologies: Spring Boot, Spring Cloud, Kafka, Docker, Kubernetes, PostgreSQL, Ubuntu, Azure Service Mesh, Redis, Angular 11

Blockchain University Certificate System - Hong Kong

Developed a blockchain-based application to manage university certificates and degrees for all institutions in Hong Kong. The application allows students to store their identity and certificates securely. Developed RESTful APIs for the web application to handle incoming requests, interface with third-party services, and upload certificates to the blockchain.

Implement student administration functions. Implement a batch service to read files uploaded by students and perform validation. Develop a mobile application to display credentials and certificates. Write unit tests using the Spock framework to test functions and conduct regression tests. Fix bugs and enhance existing code.

Technologies: Spring Boot, Kotlin, Docker, PostgreSQL, ReactJS

Employee Check-In Application - Ireland

A mobile application using facial detection technology to verify and record employee check-ins and checkouts within a company.

Update and implement new functions for an existing Gradle project using Spring Boot. Implement facial recognition functionality using Python for the mobile app to identify employees. Develop new features for the employee management interface, including UI enhancements for employee recognition.

Technologies: Java Spring Boot, React Native, ReactJS, PostgreSQL

Vietnam State Audit System - VietNam

The Vietnam State Audit System comprises multiple software products that support various activities of the Government Auditor, such as: - Audit history and activities management software - Audit data management - Supporting software for Construction Audit: This specialized tool aids Construction Auditors in their audit processes - Supporting software for Finance Audit, Banking Audit, and State Funds Audit

Manager user Finance report tax and audit

Technologies: Angular 6, Spring Boot, Postgres

Treelion Wallet App - Hongkong

The Treelion Wallet is a mobile application focused on fostering a Green Digital Economy using blockchain technology based on the Ethereum network. It allows users to invest and donate in economic products using Ethereum tokens, Bitcoin, and Apple Pay. The app includes integration with the Stripe payment gateway and enables product status tracking by scanning barcodes with a mobile device. Additionally, users can engage in a small game that allows them to plant, decorate, and share trees on social media and other networks.

Design the database Develop features

Technologies: Blockchain, Ethereum N, Network, Backend - Spring Boot, Maven, Liquibase Swagger, DB - Postgres, Client, Android, IOS Swift

NEOSSE Dating Mobile Application - France

NEOSSE is a mobile dating application designed to match users by utilizing a series of character-based questions.

Calculate the score for pairing users. Manage users. Manage questions and question categories. Configure pairing settings.

Technologies: React Native for mobile app, ReactJS for admin web app, Spring boot for backend

Project list

Education

Expertise