Portfolio.
ไทย

Hello, I'm

Chanchai Tasujai

Project Manager · Senior QA · Full-Stack Developer

[email protected]Lamphun, Thailand
Chanchai Tasujai

In Numbers

Skills and results accumulated throughout my career

7+

Years of Experience

10+

Projects Delivered

20+

Technologies

3

Certifications

About Me

🚀 My Journey

I am a Lamphun native and currently live and work here. Starting as a Computer Teacher, I learned the art of knowledge transfer. Then, as a Software QA, I developed an eye for detail and quality. Advancing to Project Manager gave me a holistic view of business and management.

Today, I merge all these experiences to walk the path of a Full-Stack Developer with a dream of having my own product. Although I may not be a deep-level code wizard, my strength lies in my passion for technology and leveraging modern tools—especially applying AI to multiply productivity.

I don't just aim to "write code" but to "build solutions" because I understand the importance of Business Requirements (PM view), Quality Gates (QA view), and User Experience. I never stop learning and am always ready to adapt to the fast-paced world of innovation.

#ActiveLearner#TechEnthusiast#ProblemSolver

Diverse Background

Teacher -> QA -> PM -> Dev. A unique blend of skills.

Full-Stack Capable

Proficient in both Frontend (React) and Backend (Node/Supabase).

Fast Learner

Adapting quickly to new tools like AI, Cloud, and Frameworks.

Quality First

Deeply rooted testing mindset ensures robust and bug-free code.

Work Experience

Zeabix Company Limited

Full-time · 1 yr 1 mo

Bangkok, Thailand

Project Manager

Oct 2025 - Present · 8 mos
  • Led ATP30 project delivery from scope planning through UAT milestones.
  • Aligned business, client, and engineering teams to reduce requirement gaps.

Key Achievements

  • Delivered UAT milestone on schedule under constrained team capacity.
  • Reduced repeated requirement rework by improving backlog grooming and acceptance criteria.

Soft Skills & Leadership

  • Managed cross-functional stakeholders with clear risk and priority communication.
  • Drove Agile ceremonies (Sprint Planning, Daily Stand-up, Retrospective) for execution consistency.

Senior Software Tester

May 2025 - Oct 2025 · 6 mos
  • Owned test strategy and regression quality gates for critical modules.
  • Handled quality assurance across manual and automated testing flows.

Key Achievements

  • Reduced regression testing time by 40% using Robot Framework automation.
  • Lowered production defect leakage with risk-based testing and stronger test traceability.

Green2Get

Full-time

Chiang Mai, Thailand · Hybrid

Software Tester

Apr 2021 - Mar 2025 · 4 yrs
  • System Analysis & Design: Analyzed requirements and designed system architecture.
  • Project Management: Managed timelines and cross-team coordination.
  • QA & Testing: Designed test cases and executed manual/functional testing.
  • Infrastructure: Supported server and database reliability.
  • Issue Tracking: Managed bugs and root cause analysis.

Key Achievements

  • Expanded test coverage in critical modules and reduced repeated post-release defects.
  • Improved bug reporting workflow, reducing turnaround and re-test cycles.

Soft Skills & Leadership

  • Collaborated with enterprise stakeholders such as LION and SPRC on requirement prioritization.
  • Bridged communication between technical teams and operations users to reduce misunderstandings.

Ekapanya Hariphunchai Vocational College

Full-time

Lamphun, Thailand

Computer Teacher

Apr 2020 - Mar 2021 · 1 yr
  • Teaching Management: Delivered computer science and technology lessons for vocational students.
  • Curriculum Preparation: Planned lessons aligned with current technology trends.
  • Measurement and Evaluation: Monitored student progress through practical projects.

Nextzy Technologies

Full-time

Bangkok City, Thailand

Software Quality Assurance Engineer

Oct 2018 - Jan 2020 · 1 yr 4 mos
  • Managed tester resources and coordinated QA efforts across multiple projects.
  • Conducted User Acceptance Testing (UAT) with stakeholders and designed test cases based on requirements.
  • Quality assurance and testing for enterprise software solutions.

Education

Bachelor's degree, Information Technology

Rajamangala University of Technology Lanna

Graduated

Grade: 3.44

High School

Chakkham Khanathon School, Lamphun

Licenses & Certifications

Green Digital Skills

INCO

Issued Jun 2023

ID: 1193903779CT

Automated Software Tester Class 2

indythaitester

2024

💎 Software Testing

Generative AI for Productivity (Self Learning Track)

Online Learning

2025

💎 Generative AI

Skills & Expertise

Project Manager

PM Highlight

Agile/ScrumSprint PlanningStakeholder ManagementProject RoadmapJira
Senior QA/Tester

QA Highlight

Test StrategyRegression TestingSeleniumRobot FrameworkPostmanRoot Cause Analysis

Technical

JavaScript/TypeScriptReactNode.jsPythonSQL.NET/C#

AI & Automation

Generative AIPrompt EngineeringGemini APICursor / CopilotStable Diffusion

Development Tools

GitFigmaSupabaseDBeaverVSCodeAndroid StudioXcode

Languages

Thai (Native)English (Working proficiency)

Featured Works

Portfolio Website - 1
Website

Portfolio Website

Visit WebsiteSource Code

A personal portfolio website designed and built from scratch, supporting dual languages (Thai/English) and themes (Light/Dark) with smooth animations and full responsiveness across all devices.

Problem

  • Needed a professional platform to showcase work and experience beyond a static PDF CV.
  • PDF resumes cannot display interactive content or be updated in real-time.
  • Wanted to demonstrate Full-Stack development skills through a real-world project.

Solution

  • Built a SPA with React + Vite, implementing i18n (Thai/English) and Light/Dark mode.
  • Used Framer Motion for scroll animations and a 3D tilt effect on the profile image.
  • Deployed on Vercel with Analytics and a live visitor counter.

Business Impact

  • A living portfolio that can be updated anytime without sending a new CV.
  • Demonstrates Frontend development skills through a live product.
  • Reaches both Thai and international audiences via bilingual support.

System Architecture

  • React SPA → Vite build → Vercel CDN
  • LanguageContext (i18n) + ThemeContext (dark/light)
  • shadcn/ui components + Tailwind CSS design system
  • Vercel Analytics + CounterAPI visitor tracking

Tech Stack

ReactViteTailwind CSSshadcn/uiFramer MotionReact RouterVercel

Core Features

  • Bilingual support: Thai and English
  • Light / Dark mode with system preference detection
  • 3D tilt effect on profile image via Framer Motion
  • Scroll-triggered animations across all sections
  • Responsive design across all device sizes

Sections

  • Hero — name, contact info, social links
  • Stats — career highlights in numbers
  • About Me — story and strengths
  • Experience — work history timeline
  • Skills — tools and technologies
  • Portfolio — projects with case studies
Transport Management System (ShipManager) - 1
Web Application

Transport Management System (ShipManager)

Visit WebsiteSource Code

A logistics operation platform for Suchada 2019 that combines AI OCR, LINE Bot workflows, and actionable dashboards to reduce manual work and improve data quality.

Problem

  • Manual data entry from receipts and slips caused frequent human errors.
  • Historical document retrieval was slow and inconsistent.
  • Cost summary per trip was delayed, slowing operational decisions.

Solution

  • Implemented Gemini-powered OCR to extract and validate data before saving to Supabase.
  • Enabled field teams to upload receipts directly through LINE Bot.
  • Built dashboard and Excel reporting flow for finance and management visibility.

Business Impact

  • Significantly reduced repetitive daily paperwork across operations.
  • Reduced manual entry mistakes in expense and fuel records.
  • Improved speed of management reporting for transport profitability review.

System Architecture

  • React Web App -> Supabase (PostgreSQL/Auth/Storage)
  • LINE Bot -> Webhook/Edge Functions (Deno) -> Database
  • Gemini API -> OCR/Extract -> Validate -> Save
  • Dashboard/Excel Export -> Operational and management reporting

Tech Stack

React 19 + ViteDaisyUI + Tailwind CSSReact Router v7TanStack QuerySupabase (PostgreSQL)Supabase AuthGoogle Gemini 2.0 FlashLINE Messaging APIGoogle Drive APIFirebase (Notifications)Deno (Edge Functions)ExcelJSGoogle Analytics 4Vercel

Core Modules

  • Transport Logging - Manage standard and weight-based transport jobs
  • Expense Tracking - Track driver expenses and withdrawals
  • Fuel Logging - Record refueling and calculate costs
  • Driver Management - Driver profiles and income
  • Vehicle Management - Vehicle registration and metadata
  • OCR System - AI extraction from shipping/fuel/expense documents
  • Reports - Dashboard and summary reporting

Key Features

  • AI OCR for transfer slips, fuel receipts, and shipping forms
  • LINE Bot integration for real-time field uploads
  • Support for standard and weight-based transport calculation
  • Excel export for operations and accounting workflows
  • Responsive UI for desktop and mobile users