Technical Leader

Led ground-up modernization of a production traffic-tax control system, rebuilding it as a modular Laravel application with RESTful APIs and secure payment gateway integration.

Freelance Software Engineer

Data Amazon/Etsy E-Commerce Crawler is an automated e-commerce data-acquisition platform built with Laravel, Vue.js, MySQL, AWS, and Docker.

Senior Software Engineer / Full-Stack / Product Engineer

CardFly was a 0→1 SaaS/web and mobile startup product focused on digital social connection and contact sharing.

Freelance Full-Stack Engineer

POD Working Space is a 0→1 co-working space management platform built for operational automation.

Senior Engineer

Solar Reviews was a production solar estimation and calculation platform serving users across the United States and Australia.

Freelance Software Engineer

Data Twitter Crawler is a distributed social-media data acquisition platform designed to collect and process large volumes of Twitter/X data.

Freelance Software Engineer

Data Music Crawler is a multi-source music-data acquisition platform designed to automate collection from Japanese music/radio sources and other external platforms.

Team Leader

Textile Production Process Management was an enterprise manufacturing system modernization project for a long-established Japanese textile company.

Senior Software Engineer

Olivia was a large-scale conversational AI and recruiting platform supporting enterprise hiring workflows globally.

Freelance Software Engineer / Shopify Developer

Custom and Integrate Shopify for Japan Shop was a Japanese e-commerce customization project in which Shopify was extended to support client-specific business requirements.

Senior Software Engineer / Senior Backend Developer

Recruiting.com ATS / Job Portal was a recruiting technology platform combining an Applicant Tracking System with centralized job-market data aggregation.

Freelance Full-Stack Engineer

Zebra, Pen Pencil Shop was an EC-CUBE-based e-commerce customization project for a Japanese client.

Freelance Full-Stack Engineer

Sock Stylist Shop was an EC-CUBE-based e-commerce customization project for a Japanese client.

Senior Software Engineer / Backend Engineer

A hotel property-management platform built with AngularJS and a customized CakePHP backend, supporting reservation, room booking, billing, and guest-management workflows.

Freelance Software Engineer / Full-Stack Engineer

Book Ascom was a customized online book shop built on EC-CUBE 2.

Software Engineer / Team Leader / Project Manager / Business Analyst

TuiHat Karaoke was a digital karaoke and music-streaming web application built with Laravel, MySQL, Azure, and Wowza Streaming Engine.

Business Analyst & Team Leader (BA / Team Lead / PM / Technical Coordination)

YearStar Social was a real-time social and live-streaming platform supporting social interaction and media streaming.

Lead Software Engineer & Project Manager (PM / BA / Team Lead)

Ubest Education Platform was an education-focused web application built with Laravel and integrated with Moodle.

Technical Lead & Project Manager (Software Engineer / BA)

DoTalk was a cross-platform real-time communication and social application supporting web, Android, and iOS clients.

Software Engineer

QTRAX was a Java-based enterprise music web application using Spring MVC, Hibernate, MySQL, and third-party music APIs.

Middle Software Engineer

Layered System — Telecom Communication Log Management was an enterprise Java web application for structured telecom communication log management.

Software Engineer

Government e-administration portals supporting digitized administrative procedures and electronic public-service workflows.

Backend Developer

Mobile App for Smart Choice was an early-stage Canadian startup mobile application project where I built the backend API from 0→1 using Java, Play Framework, MySQL, and Tomcat.

Junior Software Engineer

Stylios Online Shopping was a B2C e-commerce web application developed using Java, Spring MVC, Hibernate, MongoDB, Bootstrap, AWS, and Linux.