M Fauzan Haikal Mugni
Full-Stack Developer · Bekasi, Indonesia
I build WhatsApp bots, SaaS and web systems that real businesses run on.
From the database and the AI bot to the VPS it runs on, I design, build and host the whole stack. Through my studio Hal-Creative I work with businesses like Karya Mandiri Dental and Yoyo Bolen.
Selected work
Systems in production, open-source tools and client concepts.
- Live
- Private repo
Karya Mandiri Dental
Catalog site, admin dashboard and AI WhatsApp bot for a dental equipment supplier.
One monorepo, 9 containers, CI-gated deploys to a single VPS
- Next.js 16
- TypeScript
- Prisma
- PostgreSQL
- Redis
- Live
- Private repo
Yoyo Bolen
WhatsApp ordering for a home bakery: an AI bot takes orders, quotes delivery and checks payments.
Handles 100+ customer chats a day
- Node.js
- TypeScript
- Express
- Evolution API
- Gemini
- Open source
Viewport Studio
Free, open-source Chrome extension to preview any website on phones, tablets and desktops side by side.
Up to 4 synced devices in one tab, with no debugger banner and no account
- JavaScript
- Chrome Extension MV3
- declarativeNetRequest
- Node test runner
- Playwright
- Live
- Open source
Kapster.id
Operations SaaS for barbershops: booking, schedules, cashier, customers and reports in one system.
Owner, cashier, admin and public booking apps on one NestJS API
- Next.js 16
- React 19
- TypeScript
- Vite
- NestJS
- Client concept
Lighthouse
Marketing site and direct-booking prototype for a boutique hotel on Gili Trawangan.
Full booking flow from dates to confirmation, with no personal data in the URL or storage
- React
- Vite
- JavaScript
- CSS
- In-house
Hal Support Bot
Discord helpdesk for Hal-Creative clients: bug reports, tickets and access requests in one place.
One support desk for every client project, with AI ticket summaries
- Node.js
- discord.js 14
- Node test runner
Experience
2025 – Present
Founder · Hal-Creative
Run my own studio that builds, hosts and supports web systems, WhatsApp bots and SaaS for small businesses, including Karya Mandiri Dental and Yoyo Bolen.
2022 – Present
Full-Stack Developer · Karya Mandiri Dental
Built and run the company's whole digital system: a Next.js catalog and ordering site, a role-based admin dashboard, and a Gemini-powered WhatsApp bot, all in one monorepo deployed with Docker and CI to a single VPS.
2023 – Present
Bot Developer & System Integrator · Yoyo Bolen
Designed the WhatsApp ordering system that handles 100+ customer chats a day: AI order parsing, Lalamove delivery quotes and dispatch, OCR payment checks, and an admin dashboard for orders and stock.
About
I started with a single HTML page in 2018 and learned the rest by shipping. Today most of my work is for businesses that sell over WhatsApp: the bot has to understand how customers actually type, and the admin has to trust the numbers on the dashboard.
I like owning the whole system. I write the Next.js front end, the Node.js services and the database schema, then deploy it with Docker, Nginx and CI on a VPS I maintain myself. Through Hal-Creative I also handle support for the clients I build for.
Tools I use
- Languages
- TypeScriptJavaScriptPHPSQL
- Front end
- Next.jsReactTailwind CSSVite
- Back end
- Node.jsExpressNestJSPrismaPostgreSQLRedisSupabaseCodeIgniter
- AI & messaging
- GeminiEvolution APIBaileysdiscord.jsLalamove API
- Infrastructure
- DockerNginxLinux VPSGitHub ActionsPM2
What clients say
“Fauzan transformed our manual operations into a seamless digital system. His ability to translate business needs into robust solutions is rare.”
Let's build something
Have a project in mind or need a developer who can own it end to end? Send a message and I'll reply on WhatsApp or email.
[email protected]