About Me

KhaiZiNam

KhaiZiNam (khaizinam.com) is a personal technology and programming blog by Nguyen Huu Khai - a Software Developer specializing in Web Development & Online Payment Integration since 2021. The blog provides bilingual Vietnamese - English content focusing on practical programming, IT careers, developer interviews, AI in software development, and the latest technology trends for fresher and junior developers in Vietnam.

About KhaiZiNam

Welcome to KhaiZiNam - A space for sharing knowledge, experience, and the latest updates in the world of technology and programming.

This blog was built from a passion for code and a desire to connect the Vietnamese developer community. It serves as a repository for sharing articles ranging from foundational concepts to deep dives, helping everyone learn and grow their careers together.

Origin of the name KhaiZiNam?

The name KhaiZiNam originated from a shared passion for gaming back in the Zing Me era with a childhood friend named Nam. Since both of us shared the same account, we decided to combine our names into KhaiZiNam.

Basic Info

• Author: Nguyen Huu Khai (khaizinam)
• Website: khaizinam.com
• Portfolio: KhaiZiNam Portfolio
• Github: khaizinam
• LinkedIn: khaizinam-bdemonk
• Languages: Vietnamese & English (Bilingual)
• Target Audience: Vietnamese software engineers, particularly Junior Developers and IT Freshers.

Main Blog Topics

1. Career & Interview IT (Focus)

• Real Interview Questions: Backend, Frontend, Fullstack, ReactJS, Node.js TypeScript.
• Resume/CV Writing: How to write a standout IT resume for freshers, optimizing 1-page vs 3-page CVs.
• Interview Skills: Self-introduction scripting for IT interviews, salary negotiation techniques to avoid being undervalued.
• Roadmaps: Detailed study paths for Frontend / Backend / Fullstack roles.
• Adapting to Change: NVSP certification - alternative routes for IT professionals in the AI era, freelance software development.

2. AI & Emerging Tech

• AI in Software Development: Adapting or being replaced in the face of rapid AI adoption.
• AI Use Cases: Prompt engineering with ChatGPT, Gemini, and Claude for SEO content, Next.js & Nuxt.js optimizations for AI.
• Job Market Reality: Reality check on IT layoffs and unemployment in the age of AI.
• Security & Awareness: Hidden risks when purchasing cheap AI accounts.

3. Practical Programming & Tech

• Systems & DevOps: Docker, Nginx, Linux VPS, DevOps from scratch to advanced.
• Application Deployment: Step-by-step guides to deploying PHP/Laravel, React, and Node.js applications using PM2.
• Authentication & Security: Real-world implementations of JWT, Session, and Refresh Token configurations in production environments.

4. SEO & Digital Marketing

• SEO Mindset 2026: Moving from keyword ranking to building a visibility ecosystem.
• Frontend Optimization for SEO: Implementing Next.js / Nuxt.js TypeScript for SEO, Core Web Vitals, and page speed optimizations.

My Freelance Services

If you are looking for a development partner or technical consultation, I offer the following services:

• Web/App Development: Modern website design and development (Laravel, Vue, React).
• Online Payment Integration: Integrating local payment gateways (VietQR, SePay).
• Live Chat & Plugin Development: Creating lightweight, easy-to-integrate plugins.
• Automation Bots: Custom Telegram & Discord bots.
• DevOps & Server Management: App deployments and optimization of Linux VPS configurations.
• Google Index & SEO Solutions: Fast indexation strategies for Google Search Console.
• Tutoring 1-1: Front-End & Back-End mentoring (HTML, CSS, JS, PHP, React, Vue, Laravel).

Tech Stack

• Frontend: React, Vue 3, NuxtJS, Next.js, TailwindCSS, TypeScript, Angular
• Backend: Laravel, CodeIgniter 4, Node.js, Java Spring Boot
• CMS & Enterprise: Botble CMS (Laravel-based), Multi-tenancy (tenancy-for-laravel)
• Mobile: React Native (iOS & Android)
• DevOps: Docker, Nginx, Cloudflare, Git, Linux, PM2
• Database: MySQL, PostgreSQL, MongoDB, Redis
• Payment: SePay, VietQR, VNPAY

Highlighted Projects

Automotive Multi-brand Platform - Major Vietnamese Automotive Group

Designed and built end-to-end for one of Vietnam’s leading automotive groups:

• Architecture: Multi-tenant, multi-brand - each brand runs on its own domain/subdomain with fully isolated data, powered by a shared Laravel + Botble CMS core using the tenancy-for-laravel plugin.
• Tech stack: PHP Laravel + Botble CMS, MySQL, NuxtJS (for ecommerce/sales pages), Redis, queue/job system
• Scope: Database schema design, migration strategy, multi-tenant domain routing, permission & content workflow for multiple editorial teams, SEO infrastructure at scale across multiple brands, production deployment & CI/CD pipeline
• Complexity: Tenancy requires careful query isolation, preventing session/cache/queue leaks across tenants, and safe migration strategies - a pattern many developers avoid because of the high risk of data corruption in production

MangaK - Online Manga Platform

Built and operated end-to-end - manga/manhwa/manhhua reading platform with 1,000+ DAU:

• Stack: CodeIgniter 4 (CI4) API + VueJS, MySQL, Redis cache, CDN
• Features: Chapter delivery system, user subscriptions, real-time socket chat, custom queue worker, content crawler, notifications, integrated farming game
• SEO: Self-managed technical and content SEO - on-page optimization, sitemap, structured data, page speed, and organic traffic growth strategy
• Fanpage & Community: Self-managed fanpage, content calendar, follower growth campaigns, and reader community engagement
• Security & Infrastructure: Cloudflare configuration (WAF, DDoS protection, caching rules, rate limiting), hosting management, database security (backups, access control, query hardening)

Other Projects

• Fintech Plugins: Payment gateway integrations (SePay, VietQR, VNPAY) across multiple systems
• International E-commerce: TLFparts (Netherlands) - Mobile phone & components e-commerce platform
• F&B Retail: Annam Gourmet - Premium imported grocery web platform
• Blockchain Game: TON Blockchain NFT Game

Thank you for visiting! If you’d like to collaborate or have any questions, feel free to reach out via the contact info above or connect with me on social media in the footer. 🙏