Architected and maintained core banking automation pipelines, high-availability virtualization, and internal financial applications:

• Enterprise Virtualization & Storage: Proxmox VE HA clusters with Ceph distributed storage, virtual machine lifecycle management, and high-availability failover.
• Enterprise Networking & Security: Multi-VLAN segmentation, MikroTik routing topologies, FortiGate Next-Gen Firewall policies, and secure site-to-site tunnels.
• BI-SNAP & Payment Relays: Implementation of Bank Indonesia Standard Open API Pembayaran (SNAP) and real-time transaction relays between Speedcash and Pintech Core Banking.
• Core Banking Automation: Background updater daemons, database synchronizers, and automated task scheduler pipelines.
• Enterprise Systems: Development of SIBG (Sistem Informasi Bank Gresik), School Savings management system, QR payment services, and containerized HRM infrastructure.
• Hardware Integration: Web Bluetooth-driven receipt printing and automated biometric fingerprint attendance interfaces (ADMS).

A smart turn-by-turn HUD navigation ecosystem for motorcycles and smartwatches. Built with a production-grade C++ ESP32 firmware SDK featuring 60 FPS DMA-driven GC9A01 LCD rendering, 4-bit BLE GATT delta polyline stream compression, decoupled hardware inputs (buttons, rotary dial, capacitive touch), and a companion ZeppOS smartwatch integration.

An online exam and tryout engine designed for learning optimization and deep performance analytics. Built serverless on Cloudflare edge infrastructure (Pages & D1 SQL database) utilizing Svelte 5 / SvelteKit 2, Tailwind CSS 4, integrated payment gateway (Duitku), and LaTeX mathematical formula rendering.

Self-hosted, containerized personal bookkeeping platform featuring a native Model Context Protocol (MCP) Server for AI agent-driven receipt parsing, discount prorating, transaction logging, and WebAuthn / Passkeys biometric security.

Direct browser-to-thermal receipt printer library using the Web Bluetooth API. Features dynamic DOM-to-canvas rendering and Floyd-Steinberg bitmap dithering algorithms for driverless ESC/POS printing.

Automated web scraping and integration library for biometric fingerprint time & attendance devices utilizing modern web management interfaces.

A fast, sleek, and productive PowerShell environment configured for modern terminal workflows with predictive history and custom styling.