Software Engineer with 3+ years of experience building web applications, business systems, APIs, data pipelines, and production platforms. Experienced in React, Next.js, TypeScript, FastAPI, NestJS, Express.js, PostgreSQL, MySQL, and Docker, with a strong background in full-stack development, database design, REST API development, software testing, deployment, and production server management. I build ElasticSearch-powered search systems, automate workflows with Apache Airflow, develop analytics platforms with ClickHouse, and integrate external services through REST APIs.
02
Technical Skills
Frontend
React
Next.js
TypeScript
JavaScript
Redux Toolkit
TailwindCSS
Bootstrap
HTML5
CSS3
Backend
FastAPI
SQLAlchemy
Node.js
Express.js
NestJS
TypeORM
REST API
JWT Authentication
Database & Search
PostgreSQL
MySQL
MSSQL
Redis
MongoDB
Firestore
ClickHouse
ElasticSearch
Data Engineering
Apache Airflow
ETL Pipeline
Data Migration
Data Synchronization
DevOps & Infrastructure
Linux
Docker
Nginx
Reverse Proxy
PM2
SSL/TLS
DigitalOcean
AWS EC2
Testing
Unit Testing
Integration Testing
End-to-End (E2E)
Pytest
Jest
Playwright
Tools
Git
GitHub
Bitbucket
Postman
Swagger
DBeaver
Figma
03
Work Experience
Full-Stack Web Developer
2024 – Present
Tech2U Co., Ltd.
Developed and maintained production-grade POS and retail management systems.
Migrated legacy modules from CodeIgniter to React and TypeScript.
Designed and implemented REST APIs using FastAPI and SQLAlchemy.
Designed and optimized relational database structures and complex SQL queries.
Developed modules for products, categories, inventory, sales, promotions, customers, loyalty points, and role-based permissions.
Implemented advanced search, filtering, export, and reporting functionality for large datasets.
Integrated ElasticSearch to support autocomplete and full-text search capabilities.
Built automated data migration and synchronization workflows using Apache Airflow.
Integrated ClickHouse for analytics and high-performance reporting workloads.
Configured and maintained Linux production servers, including Nginx reverse proxy, SSL certificates, domain routing, and PM2 process management.
Containerized applications with Docker and maintained production environments.
Designed and maintained Unit, Integration, and E2E test suites using Pytest, Jest, and Playwright.
Participated in feature design, technical planning, code reviews, and production troubleshooting across business-critical modules.
React TypeScript Redux Toolkit FastAPI SQLAlchemy MySQL PostgreSQL ElasticSearch Apache Airflow ClickHouse Docker Nginx PM2 Pytest Jest Playwright
Full-Stack Web Developer
2023 – 2024
WinWin Interactive Co., Ltd.
Developed and maintained internal business applications and management systems.
Built frontend features using React and Redux.
Developed backend APIs using Express.js and NestJS.
Designed and optimized relational database structures.
Developed campaign, event, reward, and ranking systems.
Improved application performance and reliability through refactoring and optimization.
Wrote and maintained automated tests using Jest and Playwright.
Worked closely with stakeholders to deliver new business features and enhancements.
React Redux Express.js NestJS TypeORM MySQL Redis CodeIgniter Jest Playwright
04
Selected Projects
POS & Retail Management Platform
Production-grade POS and retail management platform supporting multi-branch operations, inventory control, sales processing, promotions, customer loyalty programs, and business analytics.
Product, Category, and Inventory Management
Sales and Point-of-Sale (POS) Operations
Promotion, Pricing, and Discount Rule Management
Customer Relationship and Loyalty Program Management
Multi-Branch Retail Operations
Role-Based Access Control (RBAC)
Business Intelligence Reporting and Analytics
Data Import, Export, and Synchronization
ElasticSearch-powered Full-Text Search and Autocomplete
React TypeScript FastAPI MySQL ElasticSearch Docker
Data Pipeline & Analytics Platform
Automated ETL workflows and reporting infrastructure.