Ni Hao, everyone!

Diaz Djul.

Fullstack Engineer

Building robust backends, seamless API integrations,
and intelligent automation systems.

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About Me

Crafting systems that
just work.

I'm Diaz Djuliansyah — a Software Engineer with 6+ years of experience designing, developing, and maintaining production-grade applications. My roots are in network engineering, giving me a deep appreciation for reliability and performance.

Currently working as IT Developer Specialist at JavaMifi (Oct 2025–Present), building automation systems integrated with major e-commerce platforms — Shopee, Tokopedia/TikTok, WooCommerce, Ecwid, and Traveloka — reducing 87% of manual order input for the team.

I'm also the Founder of CashPlay (cashplay.id), a digital top-up platform for games, mobile credits & electricity tokens — and the creator of SQLMaster (sqlmaster.id), an SQL learning platform.

6+ Years Experience
87% Team Work Automated
15+ Projects Shipped
Diaz Djuliansyah

Diaz Djuliansyah

Fullstack Engineer

Backend API Integration Automation Node.js PHP
Technical Skills

What I work with

JavaScript

ES6+, async/await, DOM manipulation, event-driven architecture

Node.js

REST APIs, Express, RabbitMQ, message brokers, server-side logic

PHP

Laravel framework, OOP, MVC architecture, RESTful backend services

MySQL / PostgreSQL

Query optimization, relational design, migrations, indexed lookups

API Integration

Shopee, Tokopedia, WooCommerce, Ecwid, Traveloka — webhooks & payloads

Automation

n8n workflows, scripting, chunked processing, ERP integration, scheduled tasks

Career

Experience

IT Developer Specialist

JavaMifi · Full-time

Oct 2025 – Present
  • Built internal automation systems integrated with Shopee, Tokopedia/TikTok, WooCommerce, Ecwid & Traveloka.
  • Automation eliminated 87% of manual order input, significantly increasing company revenue and team efficiency.
  • Developed Master Logistics (master-logistics.netlify.app) — an internal logistics app for order tracking and AWB generation, integrated with the company ERP.
Automation Shopee API Tokopedia WooCommerce Ecwid Traveloka ERP

Full Stack Engineer

Jubelio · Full-time

2022 – 2025
    Node.js RabbitMQ WooCommerce API MySQL

Software Engineer

Malaysia B2B/B2C Project · Contract

2021 – 2022
    PHP Laravel B2B Debugging

Network Engineer & Freelance Dev

ISP · Freelance

2019 – 2021
    Networking NOC Laravel PHP
Work

Featured Projects

Platform

Jubelio Store Revamp

Rebuilt WooCommerce store platform with RabbitMQ architecture, cutting site creation time to under 15 minutes and boosting system reliability.

Node.jsRabbitMQWooCommerceMySQL
Platform

Jubelio Store V2

the Admin Dashboard for flexible website data management from the ground up.

FullstackDashboardAPIsJavaScript
Platform

Jubelio Page

streaming features to increase user engagement and drive sales.

Micro-siteLive StreamingE-commerceAPI
POS System

Jubelio POS

centralized product management, promotions, and price tools.

POSRetailIntegrationsNode.js
Logistics

Master Logistics

tracking and AWB generation, integrated with the company's internal ERP system.

LogisticsERPAWBTracking
EdTech

SQLMaster

SQLEducationOnline CourseCreator
Startup

CashPlay

FounderFinTechTop-UpGamesPHP
Education

PPDB Online System

streamlining enrollment with digital forms and automated processing.

LaravelPHPMySQLEducation
B2B

Supplier Portal (B2B)

workflows, supplier management, and application maintenance.

LaravelPHPB2BPortal
Credentials

Certificates

Database

PostgreSQL — Jubelio

Issued by Jubelio

Certificate of completion for PostgreSQL training, covering advanced querying, performance tuning, and database design.

View Certificate
Community

Google Developer Group — Bogor

Issued by GDG Bogor

Certificate of participation from Google Developer Group (GDG) Bogor, covering modern developer practices and Google technologies.

View Certificate
Get In Touch

Let's work together.

Whether you have a project in mind, need a backend engineer, or just want to say hi — my inbox is always open.

Email

diazdjul19@gmail.com

WhatsApp

Send a message

GitHub

github.com/diazdjul19
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