Jonathan Chang

Software Engineer & Full-Stack Developer

Experienced Software Engineer with 6+ years of expertise in backend (Golang, Ruby on Rails, Laravel) and frontend (React, Next.js) technologies. Specialized in building scalable applications with modern DevOps practices and client requirement analysis.

Jakarta, Indonesia

jonathanchang96@gmail.com GitHub LinkedIn Upwork

About Me

With over 6 years of experience in software engineering and full-stack development, I specialize in building scalable web applications across healthcare, finance, logistics, and telecommunications industries. I have a proven track record of leading development teams, gathering user requirements, and delivering complex projects from conception to production.

Currently working as a Software Engineer at Hyperscal, gathering requirements from Philippines telco clients and providing technical solutions. I'm also exploring opportunities in the Blockchain industry to apply my skills in emerging technologies while continuing to grow my expertise in modern development practices.

Education

Bachelor of Computer Science

Universitas Bina Nusantara (2014-2018)

Certifications

Certified Ethical Hacker
Tokopedia Tech Workshop - Build Scalable APIs with gRPC
The Complete Guide to Becoming a Software Architect
Google Tag Manager (GTM) Training Course

Professional Experience

Over 6 years of building scalable applications across multiple industries

Software Engineer

Hyperscal, PT SOD TECHNOLOGY INDONESIA

Jakarta, Indonesia

August 2024 - Present

Software Engineer responsible for gathering user requirements from Philippines telco clients and providing technical solutions. Currently working on warehouse management system and upcoming BSS/billing system for Philippines telco company.

Key Achievements

Gathering user requirements from Philippines telco clients and providing technical solutions
Successfully migrated millions of records from MySQL and Oracle with zero data loss
Currently developing Inventory Management System for warehouse partners (ongoing)
Leading development of new BSS/billing system end-to-end for Philippines telco company (upcoming)
Enhanced warehouse fulfillment efficiency and traceability

Technologies Used

LaravelMariaDBOracleDockerGoReactPower BuilderHorizonRedis

Fullstack Developer

ALODOKTER, PT ALODOKTER TEKNOLOGI SOLUSI

Jakarta, Indonesia

April 2022 - July 2024

Led a team of 3 developers to build online pharmacy platform and insurance management dashboard. Optimized cart routing logic achieving 40-50% performance improvement.

Key Achievements

Led team of 3 developers in building complete online pharmacy platform
Achieved 40-50% performance improvement in cart routing logic
Built order tracking system for partner pharmacies to manage order lifecycle
Developed insurance dashboard for admin management with employee registration and claims
Integrated VIDA face detection for registration validation on frontend
Built real-time order management dashboard for pharmacy partners

Technologies Used

Ruby on RailsPolymer JSKubernetesDatadogElastic SearchMongoDBVIDA

Fullstack Developer

PT GRAHA CITRA PRATAMA

Jakarta, Indonesia

March 2018 - April 2022

Developed HRIS/Payroll system with fingerprint integration, implemented Microsoft Dynamics NAV, and created Credit Memo Approval system with Accurate Online API integration.

Key Achievements

Built comprehensive HRIS/Payroll system with fingerprint integration
Implemented Microsoft Dynamics NAV for accounting department
Created Credit Memo Approval system with Accurate Online API
Generated automated PPH21 CSV forms and performance reports

Technologies Used

PHPLaravelJavaMySQLSQL ServerMicrosoft Dynamics NAV

Featured Projects

A showcase of applications I've built across different industries

CRM Platform

CaterFood - Catering CRM Platform

Role: DevOps

CRM system for catering companies to manage customers, orders, and daily meal adjustments. Handled complete DevOps implementation including deployment and CI/CD pipeline.

Key Features

Customer management
Daily meal adjustments
Order tracking
Analytics dashboard
Jenkins CI/CD
Domain setup

Tech Stack

LaravelReact.jsJenkinsDockerCI/CDDomain Management

E-commerce

Startner.id - Digital Marketing Platform

Role: Full-Stack Development & Integration

Full-stack e-commerce platform for digital marketing products with payment gateway integration and comprehensive admin panel.

Key Features

E-commerce functionality
Payment gateway (Midtrans)
Partner dashboard
Unit testing
CI/CD pipeline

Tech Stack

LaravelMySQLDockerNginxCI/CD

Internal Tool

Startner Partner Dashboard

Role: Backend Development & DevOps

Developed a dedicated dashboard for partners to view and accept incoming project offers, manage ongoing campaigns, and track performance metrics.

Key Features

Project offer management
Campaign tracking
Real-time notifications
Secure partner login

Tech Stack

GoMySQLDockerNext.jsCI/CDReact.js

Healthcare Platform

Alodokter Online Pharmacy

Role: Full-Stack Development & Integration

As PIC, led development of the web version of Alodokter's pharmacy commerce platform - previously available only on Android and iOS. Integrated real-time order management and partner tracking features.

Key Features

E-commerce platform

Tech Stack

Ruby on RailsPolymer JSMongoDB

Internal Tool

Partner Order Management Dashboard

Role: Full-Stack Development

Built an internal dashboard for partners to track, manage, and fulfill incoming pharmacy orders efficiently with role-based access.

Key Features

Order tracking and filtering
Role-based access control
Performance analytics

Tech Stack

Ruby on RailsPostgreSQL

Internal Tool

Insurance Management Dashboard

Role: Frontend & Integration

Admin dashboard for insurance company partners to manage employees, registrations, and claims with face detection validation.

Key Features

Employee registration with face detection
Claims management
User deactivation
Document validation

Tech Stack

Ruby on RailsPolymer JSVIDAFace Detection

Company Website

BDA Group - Company Profile

Role: Full-Stack Development & DevOps

Multi-page company website with AWS infrastructure setup and automated deployment pipeline.

Key Features

Company catalog
AWS infrastructure
Automated deployment
Content management

Tech Stack

LaravelReactMySQLAWS S3CloudFrontEC2CI/CD

Mobile Platform

Snuffle - Dog Walking Platform

Role: Backend Development

Enhanced dog walking platform with real-time features and payment integration.

Key Features

Voucher management
Real-time location tracking
PayPal integration
Mobile-first design

Tech Stack

LaravelPHPWebSocketsPayPal API

Internal Tool

HRIS System

Role: Full-Stack Development

Comprehensive Human Resources Information System with fingerprint integration, payroll automation, and complete employee lifecycle management.

Key Features

Integrated with fingerspot machine & realtime absence
Calculate PPh21 & generate pay slips
Off request, overtime request, etc
Manage employee document
Key performance Index management
Manage upload payroll per division, like SPG admin, manual meal allowance upload, bonus upload

Tech Stack

PHPLaravelMySQLFingerspot Integration

Current Projects

In Progress

Learning Management System

Role: Frontend Development

School management system for student registration, curriculum management, classroom organization, and administrative tasks.

Key Features

Student registration
Curriculum management
Classroom organization
Building management
Transportation
Payroll system

Tech Stack

React

Planning Phase

Trip Manager Expense (Concept)

Role: Full-Stack Development

Expense management system for group trips with AI integration and social media connectivity to improve user experience.

Key Features

Expense tracking
Bill splitting
LLM integration
Social media connectivity
Trip collaboration

Tech Stack

GoReactLLM IntegrationSocial Media APIs

Let's Connect

I'm always interested in discussing new opportunities, especially in the Blockchain industry. Let's talk about how we can work together!

Email Me GitHub LinkedIn Upwork