Hi, I'm Andy Widianto 👋

Full Stack Developer & AI Engineer

I build modern web applications, scalable backend systems, and AI-powered solutions that solve real-world problems through technology.

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About Me

Hi, I'm Andy Widianto, an Informatics Engineering student and Full Stack Developer with a strong interest in backend engineering, artificial intelligence, and modern web technologies. I enjoy building scalable web applications, RESTful APIs, and AI-powered systems that solve real-world problems.

My experience includes developing full-stack applications using React, Vue.js, Next.js, NestJS, Laravel, Express.js, PostgreSQL, MySQL, and Redis. I also have hands-on experience deploying applications on Linux servers and integrating technologies such as Docker, Ollama, Local LLMs, RAG (Retrieval-Augmented Generation), Gemini API, and WhatsApp API to build intelligent automation solutions.

One of my main projects is a Private AI Chatbot for Village Public Services, which leverages local large language models, RAG, and prompt engineering to provide accurate public information, manage citizen complaints, and automate administrative services through WhatsApp.

I am passionate about continuously learning new technologies, writing clean and maintainable code, and creating software that delivers meaningful value to users. My goal is to become a software engineer who combines backend development, AI, and cloud technologies to build impactful digital products.

Focus & Expertise

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Focused on Full Stack Development, Backend Engineering, Artificial Intelligence, REST APIs, Local LLMs, RAG, and Cloud Deployment.

Projects

AI Engineer & Fullstack Developer

AI E-Commerce Shopping Assistant

A WhatsApp-based AI shopping assistant that helps customers search products, receive intelligent recommendations, view detailed product information, and place orders through natural conversations. The system combines the Gemini API with RAG to provide relevant, accurate responses and automate the entire shopping workflow.

NestJS
React
PostgreSQL
Redis
Baileys
Google AI Studio (Gemini API)
RAG

Fullstack Developer & AI Engineer

Private Village AI Chatbot

Asisten AI pribadi yang mengambil informasi dari basis pengetahuan internal menggunakan RAG, mendukung percakapan bahasa alami, dan menyederhanakan alur kerja layanan publik melalui integrasi WhatsApp.

NestJS
React
PostgreSQL
Redis
Evolution API
Ollama
Gemini API
Local LLM
RAG
Ubuntu Linux

Skills

AI & System Engineer

Linux Server Administration, Ollama, Gemini API, Local LLM Deployment, Retrieval-Augmented Generation (RAG), Prompt Engineering.

Tech Stack

Backend Developer

Developing RESTful APIs and backend systems using NestJS, Laravel, Express.js, Next.js, PostgreSQL, MySQL, and Redis.

Tech Stack

Frontend Developer

Next.js, React, Vue.js, Blade, Tailwind CSS, JavaScript, TypeScript, Responsive UI, REST API Integration.

Tech Stack

Certificate

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