Available for Freelance Projects

Hi, I'm Kevin Winarko

Software Engineer / Backend & Full-Stack Specialist

Experienced Programmer with years of expertise in PHP, Laravel, Livewire, Filament v3, MySQL/PostgreSQL, and Automated Backend Testing. Proven track record in high-scale e-commerce engines, async batch processing, multi-tenant promotion platforms, and enterprise CMS administration.

Work Experience Featured Projects Contact Me

Core Tech: PHP 8.3 / Laravel 12 Livewire 3 & Filament v3 MySQL & PostgreSQL Tailwind CSS Java SDET & Testing

Kevin Winarko

Software Engineer

Pematangsiantar, Indonesia

Specializations:

E-Commerce & Promotions Engineered voucher rules, flash sale campaigns, and seller promotion architectures.

Learning Platforms & CMS Architected dynamic course portals, interactive search filtering, and reactive admin management panels.

Backend Quality & Testing Developed automated test suites, background queue pipelines, and robust production API services.

Email: kevin.winarko@outlook.com

5+ Years Software Experience

Enterprise Production Systems

10+ Web & Backend Systems

Full-Stack PHP & Laravel

Career History

Work Experience

My professional career across software agencies, education institutes, enterprise software, and fintech quality assurance.

Suitmedia Digital Agency • Jakarta, Indonesia

Backend Engineer / Software Engineer

Project: Datascripmall.ID

June 2025 - Present

PHP 8.3 Laravel 10 Livewire 3 MySQL Spatie Laravel Horizon

Key Contributions & Achievements:

Promotions & Campaign Engine: Engineered complex promotion architectures across multi-tenant e-commerce operations, supporting platform/seller-funded vouchers, flash sales, and discount rules.
Async Data Processing & Bulk Imports: Re-architected catalog bulk import services into memory-efficient chunked batch processing pipelines using Laravel Excel featuring real-time progress tracking.
Omnichannel Sync & Export APIs: Developed background sync notification systems and high-throughput export APIs for multi-channel inventory, product prices, and stock transfers across ERP and external sales platforms.
Comprehensive Audit Logging: Designed and standardized full-stack activity logging (spatie/laravel-activitylog) across buyer, seller, CMS admin, and order lifecycle events with diff visualization.

PT. Attitude and Skill Development • Medan, Indonesia

Full Stack Web Developer / Laravel Developer

Project: Attitude & Skill Development Institute (ASDI) Platform & LMS

July 2026 - Present

Laravel Blade Tailwind CSS Filament v3 Spatie Permission Spatie Activitylog Spatie MediaLibrary Hostinger

Key Contributions & Achievements:

Frontend Catalog & Dynamic Filtering: Engineered responsive course catalog pages with real-time search, category filters, multi-criteria sorting (price, popularity, title), and grid view toggles.
Admin Management Panel: Built administrative dashboard powered by Filament v3 for managing courses, curriculums, instructors, articles, testimonials, and site settings.
Security & Audit Logs: Implemented Role-Based Access Control (RBAC) via spatie/laravel-permission and integrated automated audit trailing.
Media & File Handling: Integrated spatie/laravel-medialibrary for optimized asset storage, thumbnail creation, and media management across courses.

PT. SUCOFINDO • South Jakarta, Indonesia

IT Staff

Project: PSR Online V2, New SCI Kemitraan

March 2025 - June 2025

Laravel MySQL AdminLTE Git

Key Contributions & Achievements:

Enhancement and bug fixing for enterprise application PSR Online V2.
Initiated development and structured frontend layout using Laravel AdminLTE for New SCI Kemitraan project.

Suitmedia Digital Agency • South Jakarta, Indonesia

Software Engineer

Project: IDX RDIS, e-GRC SIER, Supermath

January 2023 - February 2025

Laravel MySQL PostgreSQL Livewire Postman Git ActiveMQ

Key Contributions & Achievements:

Integrated frontend with backend according to system analyst wireframes and requirements.
Built CMS pages using custom frontend design templates integrated with backend APIs.
Created scheduled tasks for automation and email/database notifications using Laravel framework.
Developed microservice REST APIs using Laravel for non-monolith client applications.

Bina Nusantara IT Division • West Jakarta, Indonesia

Programmer

Project: Binus Salesforce, Binus Whatsapp Chatbot

October 2021 - October 2022

Salesforce CRM 3Dolphin CRM MVEL Java Apex SOQL Postman

Key Contributions & Achievements:

Developed REST APIs for external vendors to access Salesforce CRM data securely.
Created controllers, unit tests, and Visualforce interactive user interface pages.
Engineered automated WhatsApp chatbot conversational workflows based on Binus Journey using dialog trees & MVEL.

DANA Indonesia • Jakarta, Indonesia

Associate Software Development Engineer in Test (SDET)

Project: DANA Core Backend Quality Automation

June 2020 - June 2021

Java ITest YAML TestNG JUnit Git

Key Contributions & Achievements:

Created Test Analysis, Test Scripts, and Documentation across monthly release sprints.
Maintained automated regression test suite striving for and maintaining >90% pass rates.
Handled online environment production log inspections and resolved on-duty incidents.

DanaApprenTech • South Jakarta, Indonesia

Backend SDET Trainee

Project: Backend SDET Intensive Bootcamp

March 2020 - June 2020

Java Git TestNG JMeter

Key Contributions & Achievements:

Underwent intensive training in backend test automation, performance profiling with JMeter, and Java testing frameworks.

Bina Nusantara IT Division • West Jakarta, Indonesia

Programmer & Associate Developer

Project: Binusmaya 5, BCS, Binus School Bekasi, Puhua

March 2017 - February 2020

Laravel CodeIgniter AngularJS 1 MySQL MSSQL PostgreSQL OracleSQL PHP

Key Contributions & Achievements:

Maintained and enhanced core university portals Binusmaya 5 and Binus Campus Solution (BCS).
Developed school management web portals using Laravel and AngularJS.

Portfolio

Featured Projects

Selection of key applications, platforms, and systems I have engineered.

E-Commerce & Microservices Featured

Datascripmall.ID E-Commerce Engine

Enterprise multi-tenant e-commerce platform powering seller vouchers, flash sales, bulk catalog import pipelines, and omnichannel ERP inventory synchronization.

Bulk import batching pipeline

PHPStan Level 8 clean code

Multi-tenant seller vouchers & campaigns

Spatie activity logging diffs

PHP 8.3 Laravel 10 Livewire 3 MySQL Spatie Horizon

Visit Live Platform

Full-Stack & LMS Featured

ASDI LMS & Educational Web Platform

Official web platform and Learning Management System (LMS) for Attitude & Skill Development Institute (ASDI) providing professional tax and skill training courses.

Filament v3 Admin Panel

Real-time course filtering

Spatie Media Library integration

SEO & Sitemap auto-generation

Laravel Blade Tailwind CSS Filament v3 Spatie Permission Spatie MediaLibrary

Visit Live Platform

Backend & Enterprise Featured

IDX RDIS Enterprise Portal

High-throughput financial data reporting and data dissemination system for Indonesia Stock Exchange (IDX).

Asynchronous queue messaging

Scheduled notification engine

IDX Data Dissemination Integration

Laravel PostgreSQL Livewire ActiveMQ Postman

Production Application

Backend & Enterprise Featured

e-GRC SIER Governance Platform

Enterprise Governance, Risk, and Compliance (e-GRC) management platform for PT Surabaya Industrial Estate Rungkut (SIER).

Corporate risk & compliance tracking

Automated notification schedulers

Enterprise corporate governance

Laravel MySQL Livewire Tailwind CSS Postman

Production Application

Integrations & Automation

Binus Salesforce & WhatsApp Chatbot Integration

Omnichannel Salesforce CRM APIs and automated conversational chatbot workflow engine on WhatsApp.

WhatsApp automated dialog trees

Vendor REST API gateway

Salesforce Visualforce integration

Salesforce CRM 3Dolphin CRM MVEL Java Apex SOQL

Production Application

Testing & QA

DANA Financial Services QA Automation Framework

Comprehensive backend test script automation and regression suites for DANA digital wallet backend services.

>90% automated regression pass rate

Backend load testing with JMeter

Sprint-based release validation

Java TestNG JUnit ITest YAML JMeter

Production Application

Technical Expertise

Skills & Technologies

Technologies, programming languages, and tools I use on a daily basis.

Backend Development

PHP 8.x / Laravel Framework Expert

Filament v3 Admin Panel Expert

Livewire 3 Reactive UI Expert

Async Batching & Laravel Horizon Expert

Spatie Package Ecosystem Expert

REST APIs & Omnichannel Sync Expert

Databases & Tools

MySQL & PostgreSQL Optimization Expert

Database Query Optimization & Eager Loading Expert

Git & Shared/Cloud Deployment Intermediate

Testing & Quality Assurance

Java & Backend Automation (JUnit/TestNG) Intermediate

PHPStan (Level 8) & PHPMD Standards Expert

JMeter & Performance Testing Intermediate

Frontend Development

Laravel Blade & Tailwind CSS Expert

JavaScript & Alpine.js Intermediate

Qualifications

Education Background

2016 - 2020

Universitas Bina Nusantara (Binus)

Bachelor's degree, Information Technology

Focused on Software Engineering, Database Systems, Web Development, and Enterprise System Architecture.

2013 - 2016

Sekolah Kristen Kalam Kudus Pematangsiantar

SMA, Regular / Science Track

High school diploma with a focus on Mathematics and Natural Sciences.

Get In Touch

Let's Work Together

Have a project in mind, interested in hiring me, or need consultation for a web application? Feel free to send a message.

Email kevin.winarko@outlook.com

Phone / WhatsApp +62895351374311

Location Pematangsiantar, Indonesia

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