WISNU PUTRA DEWA
Fullstack Developer — Backend at Core
About
Senior Backend Engineer with 9+ years of experience designing and building backend systems for enterprise and high-complexity domains. I specialize in backend architecture, database design (ERD), and business-critical systems, with hands-on experience across healthcare, HR management, and incentive-based platforms.
Approval Binary
Laravel plugin for binary bitmask-based approval workflows. Multi-level approval chains with efficient state tracking and high-performance querying. Demonstrates real-world enterprise patterns for complex business logic.
Healthcare Systems
Designed and maintained backend systems for multiple hospitals concurrently, handling medical data integrity and RBAC.
Enterprise HR
Backend engineer for HR systems covering employee lifecycle, approval workflows, and payroll-related logic.
Complex Business Logic
Built multi-level incentive platforms with hierarchical data modeling and complex commission calculations.
Skills
Tech stack and areas of expertise
Backend
Database
Architecture
Frontend
Tools & Practices
Projects
Selected work and side projects
MyERP
Backend-only ERP system built with Laravel 12, focused on enterprise-grade business workflows, strict type safety, and a reusable approval workflow engine.
View Project →Approval Binary
Laravel plugin for binary bitmask-based approval workflows. Multi-level approval chains with efficient state tracking and high-performance querying.
View Project →Calcpad
Terminal-based calculator with coding capabilities. Built with Rust for performance and reliability.
View Project →Primbon Java
React-based web app combining traditional Javanese Primbon divination with modern AI (GLM-4) for Weton, Compatibility, and Life Guidance insights.
View Project →