Rain B. Marpaung

Hello I'm Rain B. Marpaung

I'm working as Full Stack Engineer IT Solutions Architect Odoo Official Partner

I build systems that actually get used — from cross-platform HRIS to ERP rollouts for growing businesses. 10+ years of experience across manufacturing and consulting, working end-to-end from requirements to production.

Let's build something together.

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About Me

Indonesia

I'm a Full Stack Engineer with 10+ years of experience delivering IT solutions end-to-end — software development, network infrastructure, server management, and ERP implementation.

Currently serving as Assistant Manager at Sedaya Catur Group, a tax and accounting consultancy, where I single-handedly drive the company's digital transformation — from building an in-house HRIS with mobile support to initiating our Odoo Official Partnership.

I'm comfortable owning the full lifecycle of a project: gathering requirements, designing architecture, writing code, deploying infrastructure, and training end users. No handoffs needed.

10+ Years

Experience
10+ Projects

Completed
iOS & Android

Mobile Platforms
3+ Industries

Served

What Actually I Do My Services

Web Application

The application you need to support better operational.

Company Profile

Design and create your company's web profile.

System Integration

Integrating applications to accelerate business innovation and operational efficiency

Mobile App

The app you need to mobilize your business operations.

My Clients

Resume

My Professional Resume

My Professional Work History

Download Resume

Sep 2023 - Current

Assistant Manager - Sedaya Catur Group

• Built and launched HRIS v2 from scratch — a full-featured HR system with payroll, employee self-service, and bank transfer modules, available on iOS, Android, and web.

• Initiated and led the company's Odoo Official Partnership, handling ERP implementation for clients in the consulting and retail/trading industries.

• Designed and deployed end-to-end network infrastructure: LAN setup, PABX phone system, and a TrueNAS-based shared storage with remote access via Mikrotik port forwarding.

• Delivered a complete network and PABX installation project for a client company in Pontianak.

• Developed Coretax Supporting Tools for internal tax operations, including a DJP data integration add-on built in JavaScript.

• Delivered private projects: a Project Management App and QLC E-Learning App.

Jun 2018 - Aug 2023

IT Staff - Agri First Indonesia, PT (Cerestar Group)

• Built Weighbridge Application (WBAPPS) deployed across 4 manufacturing plants, integrated with Microsoft Dynamics NAV for real-time operational data sync.

• Developed an IT Asset Management System used across the entire Cerestar Group.

• Built Hatoban, a material search and request app to streamline warehouse operations.

• Led network infrastructure setup for a newly acquired plant using Fortigate routers.

• Managed servers, NAS, and full IT operations for the group.

May 2016 - Apr 2018

Programmer Officer - Agri First Indonesia, PT

• Developed and maintained an ERP system using ADempiere (Java) for a flour manufacturing operation.

• Set up and managed Zimbra mail server and Mikrotik network infrastructure.

• Produced management reports from ERP data for operational decision-making.

Mar 2015 - Dec 2015

Web Developer - Dexa Media Persada (Dexa Group)

• Developed a Stamp Application (JavaScript & PHP) used by Educa supermarket chain, including a CMS-powered company profile.

My Professional ERP Systems

ADempiere

80%

Microsoft Dynamics NAV 2015 & 2017

73%

Odoo (Official Partner)

85%

My Professional Programming

MySQL

80%

Php (Laravel Framework)

90%

Java (Native)

60%

Java (Spring Framework)

60%

Java (Swing)

65%

PHP (Code Igniter)

80%

My Professional Infrastructure

Linux (Debian, Ubuntu)

84%

Fortigate

70%

Mikrotik

70%

Ms Windows Server

75%

Git

85%

Network Attached Storage (NAS)

78%

Zimbra

80%

Virtual Machine

78%

TrueNAS

80%

PABX

60%

My Professional Mobile Development

iOS (Swift/Native)

70%

Android (Kotlin/Native)

70%

Flutter

82%

My Education Background History

Sep 2011 - Nov 2015

Teknik Informatika - Sekolah Tinggi Teknik Harapan

Took a major in Computer Engineering with a specialization in networking. Graduated with a GPA of 3.78 out of 4.0. During college, also worked as a freelancer at several software houses owned by professors.

Portfolio

Project14

Contact

Need Some Help?

Contact Information Find me here

Phone

081375589587

Email

rainmarpaung@gmail.com

Address

Kabupaten Tangerang, Banten