James Chang

Allen, Texas, USA | Tel: 214-836-8327

Busan, South Korea | Tel: +82 10-9110-1689

Email: jamesbchang@gmail.com

Resume: [HTML]

Github: https://github.com/jturtler

LinkedIn: https://www.linkedin.com/in/jamesbchang/

[PROFILE]:

• Software developer with over 20 years of experience in application development. For the past 10 years, I have been working remotely as a contract software developer.
• Experienced in both backend and frontend development.
• My primary residence is in Dallas, Texas, but I am open to relocation.

[TECHNICAL SKILLS]:

 Primary Skill Sets:

• React, Next.js, TypeScript, TailwindCss, PWA, JQuery
• MongoDB, PostgreSQL
• Node.js, Nest.js, Java (Spring Boot, Servlet, Web Service)
• Docker, Kafka

[WORK PROJECTS (RECENT)]:

FOS Advocacy Tracking App

• App displays/present worldwide advocacy activities entered by FOS partners in the DHIS2 system.  
  Data is presented in a horizontal timeline manner, by each month, with multiple years view capability.
• PDF printable mode exists.

[Tech: React, DHIS2]

App URL: [Link]
GitHub Repo: [Private]

Interpretation Wall App

• A discussion wall/place for chats, tables, and other analytics displayed in the DHIS2 system.
• Comments and likes can be added.  Also, subscribing to the topic feature is available.
• Top ranking list and search features are available.

[Tech: React, DHIS2]

App URL: [Link]
GitHub Repo: [Link]

  

WorkForce App

• Field data capturing app (client activity data) for offline & online mode.
• With PWA implementation, it has the offline working capability - via Syncing.  
• Configuration driven app - Front end UI & workflow, Backend operations are all configurable, thus able to support multiple variations of operations & UI - on different types of project.
• Responsive Design for Mobile & Computer View.

[Tech: PWA, MongoDB, JQuery]

App URL: [Link]
GitHub Repo: [Private]

Praxis App

• Upgrade project for the client’s existing React application, including analysis of the current app structure and codebase, updates to support DHIS2 API changes, and fixing existing bugs.
• Field data-capture application used for the client’s operational work.
• Stores data locally in IndexedDB first and synchronizes with the server when connectivity is available.
• Implements a job-queuing mechanism to manage failed operations and ensure reliable retry processing.
• Uses a backend worker thread to process tasks in the background, improving stability and preventing failures caused by UI operation crashes.

[Tech: React, DHIS2, PWA, Webpack, Dexie]

App URL: [Private]
GitHub Repo: [Private]

 

[PERSONAL PROJECTS (RECENT)]:

React Job Queue App

• Prototype application to test and validate a custom job queue implementation.
• Jobs represent tasks or operations executed during the data synchronization process.
• Implements middleware to manage job queue processing, including task scheduling and execution.

[Tech: React, TailwindCss, Redux]

App URL: [Link]

GitHub Repo: [Private]

React Task Manager App

• Quick task management app with adding/completing/updating tasks.
• UI design practice app. 2 different task list views switching.
• Integration testing, unit testing, and E2E PlayWrite testing

[Tech: React, Typescript, TailwindCss, Redux, Vitest]

App URL: [Link]

GitHub Repo: [Private]

Java Online Banking Project

• Java-based microservices application for a prototype banking platform mimicking operations like customer accounts, order, and payments in a distributed system.
• Modular design with separate services (API Gateway, Config Service, Customer Service, Order Service, Payment Service, Service Registry) using Spring Boot and Maven.
• Dockerized services orchestrated via Docker Compose, including database initialization scripts.
• Shared common libraries (DTOs), Eureka service discovery, and configuration management.

[Tech: Java Spring Boot, Maven, DTO, Eureka, Kafka, Docker]

GitHub Repo: [Private]

NextJs Stock Tracker

• Stock Tracker App for displaying the stock information.  Used yahoo stock real time ticker api.

[Tech: Next.js, React, TypeScript, TailwindCss, MongoDb]

App URL: [Link]

GitHub Repo: [Private]

NextJs Money Management

• Money Management App that lists expenses.  Includes calendar style listing & summary graphs.  
  

[Tech: Next.js, React, TypeScript, TailwindCss, MongoDb]

App URL: [Link]

GitHub Repo: [Private]

NextJs Project Event Flow

• View project events in a timeline flow, calendar, and other ways.
  

[Tech: Next.js, React, TypeScript, TailwindCss, MongoDb]

App URL: [Link]

GitHub Repo: [Private]

NextJs Personal Financial Management

• ‘Personal Financial Management’ App for personal expense management.

[Tech: Next.js, React, TypeScript, TailwindCss, MongoDB]

App URL: [Link]
GitHub Repo: [Private]

NextJs Ecommerce App

• Ecommerce app for shopping on general items.

[Tech: Next.js, React, TypeScript, TailwindCss, MongoDB]

App URL: [Link]
GitHub Repo: [Private]

Dynamic Web Service NodeJs

• ‘NodeJs’ version of ‘Dynamic Web Service’.
• Configurable sequence of actions in the backend.  Within each action, manipulate data using javascript code, make REST Request calls (internal/external), and perform other types of backend operations as needed.

[Tech: NodeJs, Github Api]

App URL: [Link]
GitHub Repo: [Private]

[OLDER PROJECTS]:

• They are mentioned in the resume link on top.

[Tech: Java, PostgreSQL, FHIR, NodeJs, etc.. ]

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