Watthana.

Hi, I'm

Watthana Kayowaen

Full-Stack Developer

About Me

Watthana Kayowaen

Hello, I'm Jame, a dedicated Full-Stack Developer with a strong interest in modern web technologies. I’m passionate about building applications that are visually refined, high-performing, and genuinely user-centric.

With solid experience in both frontend and backend development, I focus on writing clean, maintainable code and designing systems that are structured, scalable, and reliable.

Email

watthana.wk@gmail.com

Skills & Technologies

Frontend Development

ReactNext.jsTypeScriptJavaScriptTailwind CSSHTML/CSS

Backend Development

Node.jsExpressNestJsREST APIPython

Database

MongoDBPostgreSQLMySQLRedis

Tools & Technologies

GitDockerVercelGitHupGitLabOCRDeep Learning

Featured Projects

mobile

Smart Farm Management App

A smart farm management application for farmers to efficiently track and manage agricultural expenses

FlutterDartAndroid Studio
backend

Farm Expense Management API

An agricultural expense management system with OCR receipt scanning and farm management features.

Node.jsExpress.JSMySQL
fullstack

Face Tracking System

Real-time Behavioral Monitoring for Online Examinations

Next.jsTypeScriptTailwindCSSSupabase
machine learning

Thai Handwritten OCR

Optical Character Recognition (OCR) for Thai Handwritten Text Using Deep Learning

PythonPyTorchVision Transformer
backend

Inventory Management API

A RESTful API for inventory management with JWT authentication and role-based access control

NestPostgreSQLSwaggerDocker

Work Experience

Farm Management App

University of Phayao

Phayao, Thailand•October 2024 - March 2025•5 months
  • ›Developed agricultural expense management mobile application using Flutter and Node.js
  • ›Implemented OCR receipt scanning feature with Google Cloud Vision API for automated data entry
  • ›Built secure REST API with JWT authentication and MySQL database integration and Created admin dashboard for user management
FlutterExpress.jsNode.jsMySQL

Face Tracking System

University of Phayao

Phayao, Thailand•June 2025 - September 2025•3 months
  • ›Developed a face tracking system using Next.js and face-api.js for 2FA authentication
  • ›Integrated MediaPipe for real-time face orientation detection and pose verification
  • ›Built live tracking analytics with orientation monitoring and session statistics
Next.jsTailwind CSSSupabasePostgreSQLFace API.jsMediaPipe

Inventory & HIS System

Dudee Indeed Co., Ltd.

Chiang Mai, Thailand•November 2025 - March 2026•4 months
  • ›Built a RESTful Inventory API with NestJS (Modular Monolith), covering procurement flow (PR → PO → GR → Stock) using PostgreSQL, TypeORM, and Swagger
  • ›Built and executed an ETL pipeline migrating legacy JSON and external DB data to PostgreSQL, using advanced SQL and Python to ensure data integrity and resolve duplicates
  • ›Developed RESTful APIs for HIS master data management, ensuring data consistency and system integration
NestJSTypeScriptPostgreSQLSwaggerDockerPythonStreamlit