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 creator of SQLMaster (sqlmaster.id), an SQL learning platform, and I previously built scalable fullstack solutions at Jubelio, cutting import times by 45% and shipping platforms used by thousands of merchants.

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
  • Rebuilt Jubelio Store V1 with RabbitMQ message broker, reducing WooCommerce site creation time to under 15 minutes.
  • Increased product import speed by 45%+ using chunked processing and message broker architecture.
  • Pioneered development of Jubelio Store V2 Admin Dashboard for flexible website data management.
  • Contributed to Jubelio Page — a Linktree-like micro-site platform with e-commerce & live streaming.
  • Collaborated on Jubelio POS — integrated POS system for online/offline sales.
Node.js RabbitMQ WooCommerce API MySQL

Software Engineer

Malaysia B2B/B2C Project · Contract

2021 – 2022
  • Developed B2B & B2C applications for a company in Malaysia.
  • Built features for a Supplier Portal Application.
  • Responsible for maintenance, debugging, and code reviews.
PHP Laravel B2B Debugging

Network Engineer & Freelance Dev

ISP · Freelance

2019 – 2021
  • Designed robust network infrastructure for business internet connectivity. Part of the NOC team ensuring uptime.
  • Developed PPDB Online system, E-Raport application, and a pesantren website using Laravel.
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

Shopify-like e-commerce platform with high customization. Built the Admin Dashboard for flexible website data management from the ground up.

FullstackDashboardAPIsJavaScript
Platform

Jubelio Page

Linktree-like micro-site platform with e-commerce and live streaming features to increase user engagement and drive sales.

Micro-siteLive StreamingE-commerceAPI
POS System

Jubelio POS

Integrated Point-of-Sale system for online and offline sales with centralized product management, promotions, and price tools.

POSRetailIntegrationsNode.js
Logistics

Master Logistics

Internal logistics web app for JavaMifi — simplifies order tracking and AWB generation, integrated with the company's internal ERP system.

LogisticsERPAWBTracking
EdTech

SQLMaster

Co-created SQL learning platform at sqlmaster.id with Yoga Bagas. Teaches SQL through structured online classes.

SQLEducationOnline CourseCo-founder
Education

PPDB Online System

Online new student admission system for the 2019–2020 school year, streamlining enrollment with digital forms and automated processing.

LaravelPHPMySQLEducation
B2B

Supplier Portal (B2B)

B2B Supplier Portal for a Malaysian company, handling procurement 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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