Antonius Ronal

Antonius Ronal Peterson Purba

Senior Backend Software Engineer

Tangerang, Indonesia (GMT+7) • Open to Remote & International Opportunities Worldwide

ronal.purba@gmail.com +62 858-9378-7319 LinkedIn GitHub
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About Me

Senior Backend Software Engineer with 10+ years of experience designing and building scalable, secure, high-performance systems for digital banking, telecommunications, retail, and e-commerce.

Recently led the end-to-end development of a full digital banking platform (Laravel + AWS), transforming a traditional offline BPR into a modern online system serving 800+ customers and 21 internal staff.

Expert in Go (Golang), Laravel, Django, RESTful APIs, real-time systems (Redis/WebSockets), cloud architecture (AWS), and enterprise integrations (SAP/POS). Proven track record delivering production-grade solutions independently in remote environments with async communication and cross-timezone collaboration.

Actively seeking senior remote Backend / Fullstack roles in fintech, SaaS, or scalable platforms worldwide.

Technical Skills

Go (Golang) Laravel 11 Django Nest.js AWS (EC2, S3) Redis & WebSockets PostgreSQL • MySQL • MongoDB Kubernetes • Kafka Flutter • Firebase CI/CD • GitHub Actions SAP Integration • POS Systems

Featured Projects

Polyglot Microservices Marketplace

Personal Backend Architecture Project

View Repository

Laravel • Next.js • Node.js • Go • Django • PostgreSQL

  • Built a marketplace backend using a polyglot microservices architecture
  • Implemented core e-commerce features including product management, cart system, checkout flow, and order history
  • Designed modular services where Laravel handles core API logic while Node.js, Go, and Django handle specialized services
  • Developed product image upload, pagination, and search functionality for scalable product APIs
  • Explored distributed backend architecture by combining multiple technologies in a single system

Impact: Demonstrates backend architecture design, API development, and polyglot microservices implementation for scalable web systems.

Holy Ground – Catholic Theology Platform

Personal Fullstack Project (Demo)

Live Demo

Next.js • React • Tailwind CSS

  • Built a modern fullstack prototype for a Catholic theology website
  • Implemented interactive Bible reader with scripture search functionality
  • Designed lead magnet funnel for user engagement and data collection
  • Focused on clean UI/UX and fast performance using Next.js App Router

Impact: Showcasing modern fullstack development skills with Next.js for content-rich web applications.

Digital Banking Platform – BPR Artha Jaya

Senior Backend Engineer & System Architect

Laravel 11 • Vue.js • Redis • WebSockets • AWS (S3/EC2) • MongoDB • GitHub Actions

  • Led full development transforming offline banking into online system for 800+ customers
  • Built secure RESTful APIs + Google OAuth + role-based access control
  • Integrated AWS S3, Redis caching, WebSockets for real-time updates
  • Implemented CI/CD pipelines for zero-downtime AWS deployments

Impact: Digitized banking workflows & enabled real-time financial services

my.firstmedia.com – Customer Self-Service Portal

Backend / Product Engineer

Official Website

Django • Laravel • Golang • PostgreSQL • React • Firebase

  • Built RESTful APIs for billing, subscription & account lifecycle
  • Maintained Golang services for telephony validation & real-time monitoring
  • Optimized DB performance for thousands of active subscribers

Impact: Improved reliability & enabled seamless ISP self-service

FirstMedia ISP Platform

Backend / Product Engineer

Official Website

Django • Laravel • Golang • PostgreSQL • React

  • Developed backend for subscription, billing & telecom operations
  • Created customer data filtering for sales teams (~25% regional sales increase)
  • Resolved production issues & optimized queries

Impact: Supported active subscribers & regional growth

Ruparupa.com E-commerce Data Platform

Backend / Product Engineer – ACE Hardware Indonesia

Official Website

AWS • SAP • Kubernetes • Kafka • REST APIs • ETL • MySQL

  • Migrated & synchronized 200,000+ SKUs from SAP to AWS
  • Built scalable Kafka + Kubernetes data pipelines
  • Ensured real-time consistency across SAP, warehouse & e-commerce

Impact: Enabled large-scale SKU management & stable e-commerce launch

ACE Exclusive Mobile App

Backend Engineer – ACE Hardware Indonesia

Flutter • Firebase • AWS • Laravel • REST APIs

  • Built backend APIs for membership, rewards & real-time notifications
  • Integrated Firebase for push notifications & data sync
  • Managed secure AWS integration with retail systems

Impact: Delivered mobile-first loyalty platform with real-time engagement

ACE Hardware E-commerce & Retail System

Backend / Product Engineer – ACE Hardware Indonesia

MERN Stack • AWS • SAP Oracle Migration • REST APIs • ETL

  • Migrated legacy SAP Oracle data into AWS & MERN architecture
  • Developed backend services & ETL pipelines for inventory/transaction sync
  • Ensured real-time data consistency across stores & e-commerce

Impact: Improved scalability & enabled modern retail-ecommerce integration

Erafone E-commerce Platform

Software Developer – PT Erajaya Swasembada Tbk

Laravel • MySQL • JavaScript • REST APIs

  • Built transaction & product catalog REST APIs
  • Integrated with POS & pricing systems for real-time sync
  • Optimized backend stability & resolved production issues

Impact: Supported high-volume transactions & platform reliability

Berniaga Marketplace (now OLX Indonesia)

Software Developer

PHP • MySQL • PostgreSQL • JavaScript • Linux

  • Built core modules for ad listings, users, transactions & authentication
  • Optimized SQL queries & backend for faster load times
  • Implemented AJAX & RESTful APIs for dynamic experience

Impact: Improved performance & supported growth to thousands of daily users

Professional Experience

Senior Software Engineer (Backend)

BPR Artha Jaya Citeureup • Jul 2023 – Jun 2025

Backend / Product Engineer

PT Link Net Tbk (First Media) • May 2021 – Dec 2023

Product Engineer

PT ACE Hardware Indonesia • Apr 2016 – Feb 2021

→ Full detailed experience & tech in CV