9 Mos
Contract Extension
Client extended freelance contract through end of 2026 immediately following UJIKOM handover
01NARRATIVE & MINDSET SHIFT
From High School Dorm Initiative to National Telecom Operations
How pitching an ambitious enterprise ERP for our vocational competency exam turned into a multi-quarter professional engagement.
"Knowing that the system I engineered from my high school dorm is actively driving a national company's daily operations gives me an incredible sense of pride. It proved to me that taking bold initiatives and embracing heavy responsibilities can lead to unimaginably rewarding outcomes."
Chapter 01
The Bold Pitch: Beyond a Basic Website
Our school's competency exam (UJIKOM) required us to deliver a tech project for a real-world client. Rather than settling for a basic website or an academic simulation, I took a bold initiative: pitching a full-scale ERP system to several established companies. After multiple attempts, PT Intisel Prodaktifakom, a national telecom contractor handling mission-critical network infrastructure, accepted my proposal. Partnering with my teammate Moreno Ibrahim, I took on the dual role of Project Manager and Full Stack Developer to engineer 'Databank' — a comprehensive internal management system designed to streamline everything from Purchase Orders (PO) to employee attendance and automated payroll.
Chapter 02
No Seniors, No Shortcuts: Engineering on the Fly
Building an enterprise-grade system from scratch was intensely demanding. Utilizing React and NestJS, we architected the database, implemented secure Role-Based Access Control, and designed a highly responsive interface. Honestly, the hardest part wasn't the coding itself; it was project management. We had to define the scope and make critical architectural decisions entirely on our own, without any senior developers to guide us. We figured things out on the fly, balancing this heavy workload with our regular boarding school schedule to meet a strict three-month deadline.
Chapter 03
Production Handover & Extended 2026 Freelance Contract
We successfully delivered a fully functional system right on schedule. But the biggest surprise came immediately after the handover: the client was so impressed by the platform's utility that they offered to extend my freelance contract through the end of 2026. What started as a three-month school assignment evolved into a nine-month professional engagement to build advanced features, including data synchronization with Huawei. Knowing that the system I engineered from my high school dorm is actively driving a national company's daily operations proved to me that taking bold initiatives and embracing heavy responsibilities leads to unimaginably rewarding outcomes.
02ENGINEERING DELIVERABLES
Key Responsibilities & Architectural Deliverables
Core modules, security systems, and infrastructure engineered from the ground up to power PT Intisel's daily operations.
DELIVERABLE // 01Procurement Lifecycle
Purchase Order (PO) & Billing Engine
Developed an end-to-end Purchase Order module to streamline internal procurement submissions, multi-stage approval hierarchies, and billing/invoicing processes.
- End-to-end PO lifecycle handling: submission, tiered managerial approval, and invoicing generation
- Relational tracking for thousands of telecom equipment line items and subcontractor billings
- Audit-trailed stage gates preventing payment releases without verified delivery milestones
DELIVERABLE // 02Security Architecture
Security & Dynamic Access Control (RBAC)
Implemented a robust authentication system with Dynamic Role-Based Access Control (RBAC) to ensure secure data handling and tiered user permissions.
- Tiered access control across multiple user roles (Field Technicians, Procurement, HR, Executives)
- Secure JWT authentication with password hashing, session tokens, and route protection guards
- Strict API-level security isolating sensitive procurement and payroll records from unauthorized access
DELIVERABLE // 03HR & Financial Operations
Core Management Suite: Attendance & Automated Payroll
Engineered a multi-functional management module integrating employee attendance tracking, automated payroll calculations, and comprehensive data CRUD operations.
- Automated salary computations factoring in daily attendance records, allowances, and tax deductions
- Attendance management module tracking technician check-ins and operational staff logs
- Comprehensive employee master data directory with full lifecycle CRUD capabilities
DELIVERABLE // 04Frontend Architecture
Dynamic UI/UX & Real-time Operations Dashboard
Architected a highly responsive, interactive, and dynamic user interface using React and Native CSS, featuring a unified command center and full Light & Dark Mode support.
- Real-time operational dashboard consolidating procurement status, attendance health, and payroll data
- Full Light & Dark Mode support engineered with native CSS tokens for optimized accessibility and zero UI flicker
- High-density responsive data tables with instant multi-column search, filtering, and pagination
DELIVERABLE // 05Backend & Database
Scalable NestJS Backend & PostgreSQL Architecture
Built a robust, scalable backend using NestJS and Prisma ORM, utilizing PostgreSQL as the primary relational database for high-performance data storage.
- Strict modular architecture decoupling core domain services (databank, outsource, attendance, user auth)
- Atomic database transactions wrapping complex multi-entity mutations to prevent data corruption
- Engineered RESTful APIs from scratch with clean architectural boundaries and zero shortcuts
DELIVERABLE // 06Extended Scope & Telecom Sync
Huawei ISDP Enterprise Data Synchronization
Engineered automated data synchronization mechanisms bridging Databank with Huawei's ISDP ecosystem as part of the extended contract scope.
- Automated background data pipeline synchronizing telecom line items and status tracking with Huawei ISDP
- Trigger-based synchronization reducing manual re-entry of project progress across field operations
- Strict data reconciliation and validation rules ensuring data consistency across enterprise boundaries
03GROWTH & RETROSPECTIVE
Lessons Learned Under Pressure
Key insights gained from taking bold initiatives, managing enterprise scope with no seniors, and balancing production code with boarding school life.
Bold Initiatives Create Real Opportunities
Refusing to settle for a basic website or simulation and boldly pitching real companies turned a mandatory school exam into a 9-month professional engagement running production software.
Project Management Over Syntax
Without senior developers to guide us, the hardest part wasn't writing NestJS or React code—it was managing scope, defining boundaries, and making high-stakes decisions under a strict 3-month deadline while balancing boarding school life.
Pride in Real Production Responsibility
Knowing that code written in a high school dorm powers the daily operations of a national telecommunications contractor proved that young engineers can deliver enterprise-grade impact when they take complete ownership.
04ON-SITE DOCUMENTATION & ARCHIVES
Field Coordination & Live Engineering
Photographic archives documenting offline stakeholder progress meetings and live backend development for Databank ERP.
Stakeholder Coordination
Offline Client Meeting & Progress Review
Progress alignment and sprint review session with PT Intisel's client representative alongside co-engineer Moreno Ibrahim.
Telecom Pipeline
Huawei ISDP Auto-Merge Bot Development
Live development environment and terminal output running background synchronization of 58 telecom site records into PostgreSQL.
System Walkthrough
PO & Outsource Workflow Demonstration
Direct walkthrough showcasing sequential Purchase Order approvals, billing reconciliation, and field vendor management directly to the client.
Deep-Dive Project
Databank ERP Platform
Enterprise Telecom Infrastructure & PO Lifecycle Engine
Deep-dive case study exploring the modular monolith architecture, sequential approval workflows, HR suite, and Huawei ISDP data sync powering Databank ERP.
ReactNestJSPostgreSQLPrisma ORMCSS NativeTelecom ERP
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