Open to opportunities

Jonathan Kriswanto Full-Stack Developer.

Hi, I'm Jonathan — a Fullstack Developer from Sidoarjo, Indonesia. I build web apps, desktop software, and mobile solutions with clean code and practical design.

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01 / about

Building solutions that
make a difference.

I'm a full-stack developer from Sidoarjo, Indonesia — currently working as IT Staff at PT Surya Timur Sakti Jatim. I build web applications, internal systems, and automation tools that solve real business problems.

With experience in Laravel, CodeIgniter, and .NET across various industries — from gold trading to automotive — I focus on writing clean, maintainable code and delivering results that teams can rely on.

When I'm not coding, you'll find me exploring game development in Unity, tinkering with mobile apps in Kotlin, or contributing to open-source projects on GitHub.

📍 Sidoarjo, Taman
🎓 S1 Sistem Informasi, ISTTS
💼 Open to opportunities
🌐 Bahasa Indonesia & English

backend

PHP Laravel CodeIgniter MySQL Oracle .NET

frontend & mobile

JavaScript Kotlin Java C# Unity Python

tools

Git Bootstrap Figma VS Code Postman Swagger
02 / experience

PT. Surya Timur Sakti Jatim

Full-time

IT Staff

Feb 2025 — Present

Developed and maintained internal web-based systems using PHP (Laravel), JavaScript, and MySQL. Handled system maintenance, bug fixing, and feature enhancements for internal operational applications. Implemented business logic for sales, follow-up management, and reporting features.

Laravel PHP JavaScript MySQL

PT. UBS GOLD

Internship

Fullstack Developer (Intern)

Jan 2023 — Jun 2023

Developed a web application using the CodeIgniter framework with Oracle database. Created wireframes and presented project progress to end users.

CodeIgniter PHP Oracle Bootstrap

ISTTS Surabaya

Education

Bachelor of Information Systems

2020 — 2025

Graduated with an S1 degree in Information Systems with a GPA of 3.62. Built various academic projects spanning web development, desktop applications, and mobile apps.

Java C# Python Kotlin
03 / projects

MyCrafts — Furniture Customization

Website for customizing wooden tables and wardrobes with Laravel and Fabric.js. Used for sales and production management with warehouse stock tracking.

Laravel PHP Fabric.js MySQL
Live Demo Code

BrewCoffee — Caffeine Tracker

IOS app developed during Apple Foundation Program 2024. Track caffeine intake with record management and consumption analytics.

Swift IOS SwiftUI CoreData
Live Demo Code

UBS — Work Order System

Work order submission website built with CodeIgniter framework and Oracle database. Streamlined internal operational workflows.

CodeIgniter PHP Oracle Bootstrap
Live Demo Code

Koskuy — Boarding House Rental

Boarding house rental platform built with Laravel. Features property listings, search, booking management, and owner dashboard.

Laravel PHP MySQL Bootstrap
Live Demo Code

HotelGo — Hotel Reservation

Hotel reservation system using PHP with Laravel framework. Complete booking flow with room management and reservation tracking.

Laravel PHP MySQL JavaScript
Live Demo Code

Fishing Frenzy — Desktop Game

A fishing game built with C# and .NET Framework. Fun desktop gaming experience with fish catching mechanics and score tracking.

C# .NET Windows Forms Game Dev
Live Demo Code
04 / contact

Got a project in mind?
Let's build it together.

Whether you're a founder with a big idea, a team looking for a technical partner, or someone who just wants to geek out about code — my inbox is always open.

EMAIL

jonathankriswanto29@gmail.com

LINKEDIN

linkedin.com/in/jonathankriswanto

INSTAGRAM

@jonathankriswanto

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