Apichai Tinjong
อภิชัย ทินจอง
Full Stack Developer | Software Engineer | DevOps & Networking Enthusiast
Summary
First-Class Honors IT graduate from Khon Kaen University and Full Stack Developer with hands-on experience spanning software engineering, cloud infrastructure, and networking fundamentals. Proven track record of building production systems end to end—including an Angular and Capacitor restaurant POS with custom native plugins (ESC/POS and dual-screen), a complete warehouse ERP workflow, and mission-critical accounting modules. Successfully reduced infrastructure costs by over USD 200/month by migrating 300+ GB of object storage to Cloudflare R2 with caching. Seeking opportunities in Software Engineering, DevOps, or Network Engineering, bringing strong analytical problem-solving, practical server management, and solid Cisco-certified networking knowledge.
Education
Bachelor of Science in Information Technology
College of Computing, Khon Kaen University
2022 — 2026
First-Class Honors
Work Experience
Full Stack Developer
DELTA SOFT (THAILAND) CO., LTD.
Apr 2026 — Present
- Built the restaurant POS native app with Capacitor on an Angular codebase, enabling native plugin and SDK integration
- Developed native plugins for ESC/POS printer connectivity and the customer-facing second display on dual-screen POS terminals
- Built a warehouse system covering purchasing, sales, stock, goods receipt and issue, and storage locations, including purchase orders, quotations, delivery notes, invoices, tax invoices, and debit and credit notes
- Maintained and enhanced the accounting system, leveraging foundational accounting knowledge to ensure operational accuracy
- Maintained company infrastructure, including DigitalOcean and AWS servers and domain management
- Migrated 300+ GB of object storage from DigitalOcean Spaces to Cloudflare R2 and added a cache layer, reducing monthly cost by more than USD 200
- Tech stack: Angular, Capacitor, React, Node.js, NestJS, Java, MySQL, MongoDB, Redis, Firebase
Software Developer (Full Stack) — Cooperative Education
BUSSING TRANSIT CO., LTD.
Nov 2025 — Mar 2026
- Participated in full stack software development for 4 months
- Gained hands-on experience in a professional development environment
Freelance & Outsource
Independent / Project-Based (Over 3 years)
- Freelance: Improved systems, added new features, and handled MA (Maintenance) based on client requirements
- Outsource: Delivered work in a project-based engagement model
- Operation (Dev/Ops): Supported deployment, monitoring, and system operations to keep services stable
Technical Skills
| Languages | JavaScript, TypeScript, PHP, Python, Java, Kotlin, HTML/CSS, SQL, Go |
| Frameworks & Mobile | Angular, React, Next.js, Node.js / Express, NestJS, Spring Boot, Laravel, Flask, Capacitor, Jetpack Compose, Tailwind CSS, Astro |
| Databases & Storage | MySQL, PostgreSQL, MongoDB, Redis, SQLite, Cloudflare R2 / S3 Object Storage |
| Networking & Infra | TCP/IP, Routing & Switching Fundamentals, DNS, VLAN, Firewalls, AWS, DigitalOcean, Cloudflare (R2, CDN/Cache, Tunnel) |
| Tools & Platforms | Git, GitHub, VS Code, Postman, Vercel, Firebase, Supabase, Stripe, Prisma, Vite |
Projects
STUDENT ATTENDANCE AND ACTIVITY RECORDING SYSTEM WITH LOCATION VERIFICATION FOR SECONDARY SCHOOLS (Senior Project)
2025–2026
ระบบบันทึกและตรวจสอบการเข้าเรียนและกิจกรรมของนักเรียนด้วยวิธีการยืนยันตำแหน่งที่ตั้งสำหรับโรงเรียนมัธยมศึกษา
React.js, Node.js, MySQL, S3 Storage, GPS, LINE Notify, PWA
- Developed a GPS-based web application for student attendance and activity tracking, supporting 4 user roles: admin, teacher, student, and parent
- Implemented location verification using Ray Casting Algorithm (Geofencing) with average GPS accuracy of 13–14 meters
- Integrated LINE Notify to alert parents in real-time when students are late or absent
- Built as a Progressive Web App (PWA) with React.js frontend, Node.js backend, MySQL database, and S3 file storage
- User satisfaction rated "Very Good" (average 4.27/5.00)
Awards, Publications & Certificates
AUCC 2026 — The 14th Asia Undergraduate Conference on Computing
2026
- Oral Presentation (Thai) — Awarded Very Good Level
- Paper: "Student Attendance and Activity Recording System with Location Verification: A Case Study of Nampongsuksa School"
- Co-authored with Peeraphon Laosukangkoon and Asst. Prof. Monlica Wattana, Ph.D.
Information Technology Passport Examination (IP)
Information Technology Professionals Examination (ITPE) · Credential ID: THIP24A009
2024
Cybersecurity Essentials
Cisco Networking Academy · Credential ID: ce4d8254-e88a-4a66-9247-8d84318eac52