Building scalable backend systems for enterprise applications.
I am Harun Ar-Rasyid, a Senior Backend Engineer focused on REST APIs, microservices architecture, system integration, payment/SAP workflows, and database optimization.
Specialization
Backend Systems
REST APIs, microservices, enterprise applications, and production-focused backend solutions.
Integration
Business Workflows
Payment gateway, SAP, Odoo ERP, RFID, and internal system synchronization.
Delivery
Maintainable Code
Clean APIs, database optimization, containerized deployment, and scalable architecture.
Selected Case Studies
Enterprise Backend Projects
A curated selection of backend, integration, and microservices projects built across enterprise environments.
Shopping Tracker
A mobile application built with Kotlin to help users track their shopping lists and calculate the transactions.
Portfolio Website
A personal portfolio website built with Nuxt.js and Tailwind CSS to showcase projects and skills.
Enterprise Microservices Migration
Migration initiative from a legacy monolithic system into Golang-based microservices to improve scalability, maintainability, and deployment flexibility.
Diarium Super Apps Enhancement
Backend enhancements for an enterprise super app, improving system performance and adding new business features for production environments.
ABC System with Payment and SAP Integration
Enterprise backend system integrated with payment collection, payment settlement, and SAP systems for business process automation.
RFID-Based Gallon Tracking System
Real-time asset tracking backend using RFID and IoT integration for gallon movement monitoring and operational visibility.
Need a backend engineer for scalable systems?
I help teams design, build, and improve backend services, system integrations, microservices, and enterprise workflows.