Portfolio

Case studies in payments, hotels, device monitoring, and business operations. Explore the problem, my role, and each project’s results.

2026iot

Pantau — CCTV Management and Operator Access

In operational use: operators view cameras within assigned areas, navigate footage, and use individual accounts with activity records.

Gogo2rtcRTSPWebRTCPostgreSQLREST API

2026iot

Public Facility Emergency Button Network

Roughly 100 sites use connection checks, area-based alert routing, and a traceable history of button presses.

GoNext.jsMQTTPostgreSQLTelegram API

2026hospitality

Hotel Management System — Pekalongan

Bookings, rooms, guests, payroll, attendance, and reports are connected. The owner reports 3× monthly income based on hotel records.

Next.js 16PostgreSQLDrizzle ORMWhatsApp APITailwind CSSREST API

2026web

Jastip Order & Payment System

Unpaid orders, missing addresses, and pending refunds appear in one dashboard that can be filtered by event.

Next.jsHonoTypeScriptDrizzle ORMSQLite

2026web

AI Assistant for Business Classification

Business classification answers include official sources and quotation checks. The system flags answers that lack supporting evidence.

Next.js 16TypeScriptBunSQLiteOpenRouter APITailwind CSS

2026iot

Smart Locks for Boarding Houses & Hotels

Boarding houses use Bluetooth access without extra gateways. Hotel door access follows reservations and guest checkout.

FlutterNode.jsPostgreSQLMQTTBLEREST API

2026iot

Pantau Analytics — CCTV Analysis Prototype

Prototype/design: visitor counts, parking conditions, and event indications for staff review. Results are not operational evidence.

PythonRTSPONNX RuntimeByteTrackPostgreSQLREST API

2025iot

IoT Device Monitoring System

Data and alerts from more than eight device categories appear together, with reading history and connection status for operators.

Node.jsMQTTModbusBLEPostgreSQLRedisWebSocketREST API

2025kiosk

Photobox Photo Booth System

QRIS payment, camera capture, printing, and downloads run in one customer session on a physical photo booth.

FlutterPythonBun/ElysiaDrizzle ORMQRISCamera IntegrationTemplate Rendering

2025operations

Visitor & Facility Access Integration

Visitor arrivals, appointments, facility access, and monitoring information are connected in one operational dashboard.

GoPostgreSQLREST APIWebSocketTailwind CSS

2022fintech

Cross-border Money Transfer Platform

The money transfer platform runs in production with an operating license, transaction history, and dashboards for operational review.

Node.jsPostgreSQLRedisDockerREST API

2022fintech

Connecting Multiple Payment Services

Multiple payment services follow one operational workflow, with transaction status and records connected to the money transfer platform.

Node.jsPostgreSQLRedisDockerREST API