Chanchai Tasujai

Senior Quality Assurance Engineer

About Me

Hi, I'm Ae. Born and raised in Lamphun, and I still call it home today. My story started simply — I loved playing games as a kid, and somewhere along the way I got curious about how computers actually work. That curiosity led me into the world of technology, and I've been here ever since.

Along the way I've tried on a few different hats — computer teacher, Software QA, and project manager. Each role taught me something different, but they all revolved around the thing I love: technology.

These days I still enjoy learning something new every day, especially AI, which is changing the way we all work.

Work Experience

Zeabix Company Limited

Full-time · 100% Remote · Bangkok, Thailand

Senior QA

Apr 2026 - Present

Own software quality across 3 concurrent projects: LION (Sales Portal), ATP30 (driver data and billing), and Tokio Marine (insurance policy issuance for the Shopee platform, plus an App Modernization project migrating the Premium Queue Process to Azure)
Owned test strategy and regression quality gates for critical modules.
Applied AI to analyze and resolve user issues on the ATP30 project.
Delivered customer training sessions on the LION project.
Ran performance/load testing of the Partner API with K6, including test result reporting
Designed penetration test cases and executed E2E testing of the policy issuance system
Tested legacy-to-cloud data migration, validating document output (StreamServe) against the legacy system
Reduced regression testing time by 40% using Robot Framework automation.
Lowered production defect leakage with risk-based testing and stronger test traceability.

Project Manager

Nov 2025 - Mar 2026 · 5 mos

Oversaw the company's entire project portfolio across clients: ATP30, Tokio Marine, LION, and CHICCARRENT.
Led ATP30 project delivery from scope planning through UAT milestones.
Aligned business, client, and engineering teams to reduce requirement gaps.
Delivered UAT milestone on schedule under constrained team capacity.
Drove Agile ceremonies (Sprint Planning, Daily Stand-up, Retrospective) for execution consistency.

Software Tester (QA)

May 2025 - Oct 2025 · 6 mos

Designed and wrote test cases, and tested the system before each customer delivery on the LION project.
Ran UAT with the client and demoed the system for sprint-based deliveries.
Handled quality assurance across manual and automated testing flows, including API contract testing with Postman.
Tested an enterprise Transport Management System (TMS) with clients such as LION.

Green2Get Company Limited

Full-time · Chiang Mai, Thailand · Hybrid

Software Tester

May 2021 - Mar 2025 · 3 yrs 11 mos

Designed test cases and executed manual/functional testing across web and mobile platforms.
Deployed the web app and mobile apps (iOS and Android) to production.
Analyzed requirements, designed system architecture, and supported server and database reliability.
Managed bug lifecycle and root cause analysis.
Coordinated with an outsourced development team.
Designed UI screens in Figma for both mobile and web, based on features and user requirements.
Expanded test coverage in critical modules and reduced repeated post-release defects.
Improved bug reporting workflow, reducing turnaround and re-test cycles.

Ekapanya Hariphunchai Vocational College

Full-time · Lamphun, Thailand

Computer Teacher

May 2020 - Mar 2021 · 1 academic year

Taught vocational students in the computer curriculum.
Prepared lesson plans and teaching materials aligned with current technology.
Managed the college's Facebook Page — created content and published announcements.

Nextzy Technologies

Full-time · Bangkok City, Thailand

Software Quality Assurance Engineer

Oct 2018 - Jan 2020 · 1 yr 4 mos

Mentored junior QA team members and managed QA resources across projects.
Wrote test cases and tested the AIS client's projects — both the web application and the myAIS mobile app.
Ran UAT with the client each sprint for milestone deliveries.

Featured Works

Portfolio Website

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

React · Vite · Tailwind CSS · shadcn/ui · Framer Motion · React Router · Vercel

Visit Website

Transport Management System (ShipManager)

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.

React 19 + Vite · TypeScript · shadcn/ui + DaisyUI + Tailwind CSS · React Router v7 · TanStack Query · Supabase (PostgreSQL) · Supabase Auth · Google Gemini 2.0 Flash · LINE Messaging API · Google Drive API · Firebase (Notifications) · Deno (Edge Functions) · ExcelJS · Google Analytics 4 · Vercel

Visit Website

Castiny — cast web videos to Chromecast / Android TV

Android app that casts video links (HLS, MP4, DASH, YouTube, X) to the TV — built end-to-end from code to Play Store release. Cast device discovery over mDNS, a stream sniffer that auto-detects video URLs, full monetization (In-App Purchase + AdMob) backed by 40+ unit tests, and a Kotlin Multiplatform rewrite targeting Android/iOS from a single codebase.

Flutter/Dart · Kotlin Multiplatform · Compose Multiplatform · Google Cast Protocol · mDNS · Cloudflare Pages + KV · Google Play Console

Runboard — macOS app for managing local projects

Desktop dashboard for starting, stopping, and inspecting multiple local npm projects from one place — auto-scans for projects, streams live logs, links detected localhost URLs, and switches git branches from the UI.

Swift (native macOS + WebKit) · Node.js local server

QA Test Toolkit — Tokio Marine (Internal)

A set of tools built to speed up the team's testing work: a Payload Randomizer for generating UAT test data, a UAT Demo Runbook for client demos, K6 performance test scripts with result reporting, and a system documentation website.

K6 · JavaScript · HTML · Postman · Bruno · Docusaurus

Project Knowledge Base & User Manual (Internal)

A documentation hub that gathers each project's business logic, workflows, architecture, API specs, and user manuals in one place — with an embedded Admin UI that calls real APIs to manage master data and test endpoints directly from the docs. The single source of truth used daily by Dev, QA, BA, and Support teams.

Astro Starlight · TypeScript · Cloudflare Workers · Cloudflare Access

ATP30 Auto Verify Tool (Internal)

A web app that automatically verifies billing calculation results against the legacy system's logic — cutting manual verification time and helping the team catch discrepancies faster.

React · Vite · JavaScript

Zeabix Bot — Internal Company Chatbot

A full-stack chatbot connecting Supabase with Gemini AI, with a management dashboard and a Slack webhook integration for internal company use.

React + Vite · TypeScript · Supabase Edge Functions (Deno) · Gemini AI · Slack Webhook

Skills & Expertise

Project Management: Scope & Timeline Planning · UAT Management · Stakeholder Management · Agile/Scrum (Sprint Planning, Daily Stand-up, Retrospective) · Jira
Test Management: Test Strategy · Test Planning · Regression Testing · Risk-Based Testing · UAT · Test Traceability
Automation & API Testing: Robot Framework · Selenium · Postman (API Testing, Contract Testing, Collections) · Bruno
Performance & Security Testing: Performance/Load Testing with K6 · Penetration Test case design
Analysis: Root Cause Analysis · Bug Tracking & Reporting · System Analysis & Design
AI-Assisted Development — building and shipping real products with AI pair programming (Claude Code, Gemini); strong at system overview, choosing the right stack, and verifying output quality: Web: React, Next.js, Astro, Node.js, Tailwind CSS · Mobile: Flutter/Dart, Kotlin Multiplatform, Google Play Console (Release Signing, IAP, Closed Testing) · Backend & Cloud: Supabase (PostgreSQL, Auth, RLS, Edge Functions), Cloudflare (Workers, D1, KV), SQL, Vercel
AI: Generative AI · Prompt Engineering · Gemini API (OCR) · Claude Code · LINE Messaging API
Tools: Git · GitHub (Repository, Pull Request, Code Review) · DBeaver · Figma · Jira
Languages: Thai (Native) · English (Working proficiency)

Education

Bachelor's degree, Information Technology

Rajamangala University of Technology Lanna · Grade: 3.44

High School

Chakkham Khanathon School, Lamphun

Licenses & Certifications

Green Digital Skills — INCOIssued Jun 2023
Generative AI for Productivity — Self Learning Track2025
Automated Software Tester Class 2 — indythaitester2024

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