Yohanes Paulus Ardha SK

I grew up in East Java (Kediri).

I now live in Yogyakarta.

I study Informatics at Universitas Atma Jaya Yogyakarta.

I build web applications, POS, ERP, and kiosks from scratch.

I write code primarily in Laravel, PHP, JavaScript, PostgreSQL, and MySQL.

I was a Fullstack Web Developer at PT. HSQA Makmur Abadi.

I built operational systems, ERP, POS, and self-ordering kiosks.

I was a Fullstack Web Developer at Ascott Indonesia.

I built the POS & kiosk that served 4,500 visitors over 7 days at ASR Festival 2026.

I write code and share my updates on LinkedIn.

I have a more detailed résumé if you're into that sort of thing.

Scroll down for experience, projects & details

Experience

Where I've engineered systems and built production products.

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May 2026 — Jul 2026

Project Lead Developer

Ascott Indonesia

Jakarta · Contract

Built a POS system, operations dashboard, and self-ordering kiosk solo using Laravel, Bootstrap, and PostgreSQL for ASR Festival 2026, handling 4,500+ visitors across 7 consecutive days with zero transactional downtime.
Built real-time sales reporting and dynamic catalog synchronization, with automated receipt printing integrated via the kiosk's built-in thermal printer.

April 2025 — April 2026

Fullstack Web Developer

PT. HSQA Makmur Abadi (Jooal.id)

Yogyakarta · Full-time

Built a multi-tenant ERP platform (Laravel + PostgreSQL) serving 12+ distinct business verticals including Cafe & Restaurant, Hotel & Lodging, Auto Repair Shop, Education, Pharmacy, Warehousing, Sales Monitoring, Rental Services, Livestock Farming, Architecture & Interior Design, Gym & Studio, and Retail with an architecture supporting dynamic multi-branch scaling without structural changes to the system.
Designed flexible database schemas and business modules (inventory, POS, sales monitoring, kitchen display systems) configurable to each client's specific industry needs.
Synchronized multi-branch retail transactions in real time and streamlined operations across fulfillment, kitchen display systems, and administrative financial exports.

Project & Community

Fullstack Web Developer

Parish Community & Empowerment Initiatives

Yogyakarta · Contributor

Built an operational admin page for managing website content and homepage information for a parish website.

Projects

Selected enterprise builds, kiosks, ERPs, and web platforms.

Explore GitHub

Featured Kiosk & POS

ASR Festival 2026 Kiosk & POS

Enterprise self-ordering kiosk and cashier POS system that successfully served over 4,500 visitors at Ascott Indonesia's 7-day festival.

Laravel PHP PostgreSQL KIOSK

Production POS & ERP

Jooal.id Operational POS & ERP

Modular enterprise operational system unifying multi-outlet inventory, automated supplier orders, customer kiosks, and sales analytics.

Laravel PostgreSQL Tailwind CSS ERP & POS

Web Platform

Parish Web Management System

Administrative and schedule management web platform engineered for parish organizational workflows, bookings, and records.

Sistem Admin Paroki Santo Aloysius Gonzaga - Dashboard

Laravel PHP MySQL Blade Bootstrap

Software Innovation

GenAI-Assisted Code Engine

Implementation of IBM Granite generative AI models to accelerate test generation, code refactoring, and automated backend optimization.

IBM Granite GenAI Certificate of Completion - Hacktiv8

IBM Granite GenAI Python Code Optimization

Technologies

Frameworks, languages, databases, and engineering tools in my daily workflow.

Laravel PHP PostgreSQL MySQL SQLite RESTful APIs Laravel PHP PostgreSQL MySQL SQLite RESTful APIs

JavaScript (ES6+) HTML5 & Blade CSS3 & Vanilla CSS Tailwind CSS Bootstrap JavaScript (ES6+) HTML5 & Blade CSS3 & Vanilla CSS Tailwind CSS Bootstrap

IBM Granite Models Generative AI Software Dev Git & GitHub Linux VPS & Ubuntu Composer & npm VS Code IBM Granite Models Generative AI Software Dev Git & GitHub Linux VPS & Ubuntu Composer & npm VS Code

Certifications

Professional credentials in GenAI engineering and cyber security.

Aug 2025

Code Generation and Optimization Using IBM Granite

IBM SkillsBuild

Credential ID: MDL-566

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Aug 2025

Code Generation and Optimization Using IBM Granite

IBM SkillsBuild

Digital Badge · Verified on Credly

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Aug 2025

IBM Granite Models for Software Development

IBM SkillsBuild

Credential ID: MDL-567

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Aug 2025

Code Generations and Optimization — Student Developer Initiative

IBM SkillsBuild × Hacktiv8 Indonesia

Outstanding performance in exploratory & experimental sessions

Jun 2023

Certified Secure Computer User (CSCU v2)

EC-Council

Credential ID: 677187 · Score: 94% (47/50)

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Education

Academic foundations in Computer Science and Software Engineering.

Universitas Atma Jaya Yogyakarta

Bachelor of Computer Science (S.Kom) in Informatics

Cumulative GPA: 3.54 / 4.00 · Specializing in Web Technologies, Distributed Systems & Database Architecture.

2022 — 2026

Outside the IDE

How I recharge and cultivate discipline beyond programming.

When I step away from code and terminals, physical training is where I reset. The consistency demanded by heavy compound lifts and structured training mirrors the discipline needed to engineer rock-solid software systems.

Gym & Lifting R&B & Hip-Hop Coffee & Focus Sound Discovery

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"Still figuring out if I'm a developer who lifts, or a lifter who codes."

GitHub Activity

@YohanesPaulusArdha

1,094 contributions in the last year

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Let's work together.

Open for full-time roles, freelance contracts, and software partnerships.

Available for fullstack web development enterprise Laravel platforms, POS & kiosk hardware integrations, ERP systems, and modern web applications. Whether you need a high-performance system built from scratch or an engineer to accelerate your product team, let's talk.

Based in Yogyakarta, Indonesia. Open for on-site, hybrid, or remote collaborations globally.

Direct Email

yohanespaulusask11@gmail.com

LinkedIn Profile

Yohanes Paulus Ardha

Code Repositories

github.com/YohanesPaulusArdha

Formal Document

View Complete Résumé