Technical Projects

AI engineering, NLP, data science, and full-stack projects, from LLM-powered simulations and fine-tuned transformers to web and mobile applications in real use.

Showing 9 projects

Data Science

Urban Complaint Pattern Mining on NYC 311 Data (21M+ Records)

Data mining of 21.3M NYC 311 requests that found a six-complaint building 'syndrome' (mean lift 8.48) and validated it against 11M inspection records: 12-44x higher violation rates.

#data-mining#big-data#urban-analytics

2026View detailsView

ICONNET Finance Dashboard

Next.js 16 · React 19 · TypeScript

Internal Business Dashboard

ICONNET Finance Dashboard - OPEX, Cash Advance & Contract Monitoring

Internal finance dashboard for PLN Icon Plus that replaced spreadsheet-based reporting with four modules (OPEX monitoring, cash-advance tracking, outsourced-staff contract budgets, and vehicle monitoring) on a Next.js + Express + PostgreSQL stack, hardened after a full penetration test.

#nextjs#express#postgresql+1 more

2026View detailsView

Healthcare NLP Application

Medical Anamnesis Chatbot with NLP (Chatbot PUSTU)

Indonesian medical anamnesis chatbot for Puskesmas reaching 92.61% intent accuracy across 14 classes, trained on 14,000 samples generated with Gemini 2.0 Flash and a custom preprocessing and NER pipeline built from scratch.

#nlp#healthcare#full-stack

2025View detailsView

Emergency Mobile Application

MyFriends - Emergency SOS & Contact Management App

Flutter SOS app that sends real-time location to trusted contacts and keeps alerting through Do Not Disturb, Doze mode and a killed app via a three-layer notification system.

#flutter#firebase#emergency-app

2025View detailsView

Backend API & Cloud Infrastructure

Restaurant Management System - Backend API

REST API for restaurant operations with 30+ endpoints, three-role RBAC, dual-token JWT, and a six-state order workflow, deployed on AWS EC2 behind Nginx.

#nodejs#rest-api#aws

2025View detailsView

Simulation & Modeling

E-Commerce Trust Simulation with LLM-Powered Agents

Agent-based simulation of 7,580 Llama 3.1-powered agents showing fake-review campaigns lift conversion of low-quality products by 54-72 percentage points (Chi-Square 121-177, p < 0.0001).

#agent-based-modeling#llm#statistical-analysis

2025View detailsView

Natural Language Processing

Aspect-Based Sentiment Analysis on Financial News

Fine-tuned RoBERTa-base for entity-level sentiment on 10,686 financial headlines, reaching 86.67% accuracy and 100% recall on negative sentiment with leakage-free, title-based splits.

#nlp#sentiment-analysis#deep-learning

2025View detailsView

Cirebon Kuring Cafe

Next.js 15 · React 19 · TypeScript

Full-Stack Business System

Cirebon Kuring Cafe - Cafe Management System

Cafe operating system spanning 4 apps on one Supabase backend: QR table ordering, a Flutter staff tablet for 4 roles, an employee portal, and an owner dashboard, backed by 69 migrations and 15+ edge functions.

#nextjs#flutter#supabase+2 more

2025View detailsView

Web Security Application

LockIn - Password Manager

Zero-knowledge password manager where every secret is encrypted in the browser with AES-256-GCM and PBKDF2 (100,000+ iterations), so the server only ever stores unreadable blobs.

#security#password-manager#web

2025View detailsView