Projects — Software Engineering Portfolio by Leon Fernando Wijaya
(03) ProjectsL/
/Work
Production systems, APIs, and full-stack platforms built for real enterprise clients — each solving a concrete business problem.
Category
Tech
Selected Work
Warehouse Management System
Real-time inventory and order tracking at enterprise scale
NestJSTypeScriptPostgreSQLReact+3
Mining Expo Progressive Web App
Digital catalog and engagement platform for Indonesia's mining industry
NestJSNext.jsTypeScriptPostgreSQL+1
Analytics API Service
Behavioral tracking and insights pipeline for multi-platform clients
NestJSTypeScriptPostgreSQLRabbitMQ+2
8 Projects
Warehouse Management System
Real-time inventory and order tracking at enterprise scale
NestJSTypeScriptPostgreSQL+4
Mining Expo Progressive Web App
Digital catalog and engagement platform for Indonesia's mining industry
NestJSNext.jsTypeScript+2
Analytics API Service
Behavioral tracking and insights pipeline for multi-platform clients
NestJSTypeScriptPostgreSQL+3
Microservices RBAC & HRIS Infrastructure
Unified IAM and employee data hub across multi-platform enterprise systems
NestJSPostgreSQLTypeScript+2
Enterprise Custom CRM System
High-performance APIs for client tracking, pipeline, and transactions
LaravelNestJSMySQL+2
Centralized "My Approvals" System
Cross-departmental workflow automation with configurable approval chains
LaravelReactMySQL+2
Machinery Hub API
Sparepart interchange lookup engine with compatibility matrix mapping
NestJSTypeORMPostgreSQL+1
Attendance PWA — Haversine Algorithm
Location-based attendance system using real-time distance calculation
JavaScriptPHPMySQL