# Gilang Fathur Rachman

> Web Developer & Software Engineer based in Jakarta, Indonesia. Specializing in high-performance backend architectures, custom CMS ecosystems, relational database design, and modern AI-augmented engineering workflows.

## Summary & Engineering Philosophy
Gilang Fathur Rachman is a Computer Science graduate (S.Kom) with strong core fundamentals in software engineering, database design, and backend architectures. He leverages modern AI-assisted workflows as a productivity multiplier to accelerate development velocity while maintaining strict code quality, security, and production reliability.

- **Website:** https://gilangfrc.com
- **LinkedIn:** https://linkedin.com/in/gilangfrc
- **GitHub:** https://github.com/gilangfrc
- **Email:** gilangrachman10@gmail.com / hi@gilangfrc.com
- **Location:** Jakarta, Indonesia

## Core Technical Competencies
- **Languages:** PHP (OOP), JavaScript (ES6+), TypeScript, SQL, HTML5, CSS3
- **Frameworks & UI:** Laravel, Nuxt 3, Vue.js, Tailwind CSS, Vuetify, Pinia
- **Cloud & DevOps:** AWS (S3 & EC2), Docker, Linux VPS, Nginx, CI/CD (GitHub Actions), Git
- **APIs & Integrations:** Meta Business Cloud API (WhatsApp & Instagram), LLM Integration, Firebase Cloud Messaging (FCM), Payment Gateways (Xendit & DOKU), RESTful Webhooks
- **Architecture & Systems:** Atomic Database Locking, Event-Driven Webhooks, Asynchronous Queues, Multi-Tenant Systems, Reactive DOM Interception (Attribution Tracking), Offline-First PWAs

## Professional Work Experience

### Web Developer (Freelance) — Bio Health Indonesia
- **Period:** Jan 2026 – Sep 2026 | Jakarta, Indonesia
- **Key Achievements:**
  - Architected a custom full-stack CMS and healthcare web portal from scratch using Laravel, MySQL, and Tailwind CSS.
  - Designed relational database schemas and dynamic medical service catalogs.
  - Built high-performance, responsive landing pages optimized for medical campaigns and vaccine promotions, improving conversion rates and user engagement.

### Web Developer — Polargate Studio
- **Period:** Jun 2023 – Present | Jakarta, Indonesia
- **Key Achievements & Architecture Highlights:**
  - **Affiliate Platform:** Architected a multi-tenant affiliate network in Laravel featuring a click-attribution gateway, automated fraud detection, event-driven webhook commissions, DOKU sub-account payouts, and AWS S3 storage.
  - **Interactive Booking Engine:** Built a real-time property reservation system with dynamic SVG site plans, atomic database locking to eliminate double-booking race conditions, and granular RBAC permissions.
  - **CRM & AI Automation:** Integrated Meta Business Cloud API (WhatsApp & Instagram) and 3rd-party LLMs with conversational memory, automating 24/7 lead qualification and dynamic round-robin sales routing triggered by interactive brochure requests.
  - **Mobile CRM PWA:** Built a Progressive Web App using Nuxt 3, TypeScript, and Vuetify; engineered Workbox service-worker caching, Pinia persisted state, and Firebase Cloud Messaging for real-time mobile sales alerts.
  - **Ad Attribution & Tracking Pixel:** Engineered a first-party tracking pixel using reactive DOM interception and cross-domain session cookies, achieving 100% Google Ads and Meta CTWA attribution across visitor journeys.
  - **Event Management System:** Built a high-throughput event platform utilizing asynchronous queue workers for bulk WhatsApp/Email invitations, low-latency QR-code gate check-ins, and a live door-prize engine for verified attendees.
  - **E-Commerce Core & Checkout Engine:** Built a robust order and checkout backend in Laravel with atomic database locking to prevent stock race conditions, automated Xendit payment webhooks, and integrated domestic multi-courier logistics.

## Education
- **Bachelor of Computer Science (S.Kom)** — Horizon University Indonesia (2018 – 2022)
- **GPA:** 3.41 / 4.00