Full Stack Software Engineer / IT Specialist

IrfanRahmanindra

Design • Full Stack Development • Technology Strategy

About Me

I build enterprise software that scales.

Full‑stack engineer with 2+ years of experience delivering production systems that improve efficiency and reduce costs.

Base of Operations

Jakarta, Indonesia

INTERACTIVE 3D

Core Focus

I specialize in Java/Spring, React, SAP integrations, and bridging complex business processes with modern architecture.

End-to-End Delivery

Navigating the complete lifecycle—from architecting systems, to implementation, deployment, and agile support.

Experience

Where I've worked

Building performance-critical software, shipping scalable platforms, and bridging business processes with modern architecture.

Feb 2024 - Dec 2024

AI Governance and Tech Experience Specialist

Sinarmas Mining Jakarta, Indonesia

Built a full-stack digital project approval system integrated with SAP and internal platforms, centralizing project data and improving process visibility.
Organized a company-wide AI-focused hackathon to advance the company AI strategy.
Designed a company profile and training website with booking and payment gateway integrations.

SAP IntegrationFull-StackAI StrategyPayment Gateway

Oct 2022 - Feb 2024

Full Stack Engineer (ITDP)

Sinarmas Mining Jakarta, Indonesia

6 months of intensive learning and 10 months of hands-on training.

Improved operational efficiency by 90% and saved approximately Rp. 1.1 billion through a digital employee recognition program.
Built project tracking with calendar views and automated WhatsApp/email reminders, reducing costs by about Rp. 473 million and improving execution efficiency by 70%.
Developed real-time internal messaging with the WhatsApp Business API.
Contributed to a CSR platform, React Native news page, and CMS for news, content, and registrations.
Enhanced an internal ERP system through new modules, feature improvements, and technical issue resolution.

React NativeCMSERPWhatsApp Business APICost Optimization

Mar 2022 - Oct 2022

Junior Java Developer

PT. Indocyber Global Teknologi Jakarta, Indonesia

Built full-stack CRUD applications using Java, Spring Boot/MVC, REST APIs, and SQL Server.
Designed relational database schemas and optimized SQL queries to improve application performance.

JavaSpring BootSQL ServerREST APIDatabase Optimization

Jul 2019 - Sep 2019

Electrical Engineering Intern

PT. Toyota Motor Manufacturing Indonesia Jakarta, Indonesia

Learned operation, control, and monitoring of electrical power systems at a production plant, including a 7,615 KVA 20KV system, transformers, capacitor banks, MV/LV panels, bus ducts, and emergency generators.

Electrical Power SystemsControl & MonitoringIndustrial Automation

Education

Academic Background

Aug 2025 - June 2026

Master of Science in Information System

Nanyang Technological University | GPA 4.35/5.00

Singapore

Oct 2019 - Mar 2020

Electrical Engineering Exchange Student

Universität Duisburg-Essen, Essen

Germany

Aug 2016 - Jan 2021

Electrical Engineering Bachelor

Universitas Indonesia | GPA 3.27/4.00

Indonesia

Projects

Featured Work

Blockchain / Mobile Platform

Zeal

An end-to-end NFT authenticity platform for brand protection with blockchain-based minting and verification, secure backend APIs, and a companion mobile app.

SolidityHardhatPolygonSmart Contracts+2

Live Preview

Mobile & Cloud Platform

TrustMark

An all-in-one mobile product cataloging, inventory tracking, and QR code authentication platform built with React Native (Expo) and a Spring Boot backend.

React NativeExpoSpring BootJava+4

AuthCheckScreen.tsx

export const verifyProductCertificate = async (qrPayload: string) => {
  const serial = normalizeQrCertificate(qrPayload);
  const { data } = await apiClient.get(`/api/v1/products/verify/${serial}`);

  if (data.status === "ACTIVE") {
    return {
      authentic: true,
      productName: data.productName,
      stockStatus: data.stockStatus, // In Stock, Low Stock, Out of Stock
      certificateUrl: data.certificateQrUrl,
    };
  }

  return { authentic: false, message: "Invalid or revoked certificate" };
};

Full-Stack & Cloud Platform

ReceiptHub

An intelligent expense and reimbursement platform with automated OCR receipt parsing, Telegram Bot submissions, and a Spring Boot management dashboard.

Spring BootJava 21ThymeleafTailwind CSS+5

Telegram Bot OCR

Machine Learning & Analytics

Data Mining

A 3-part data mining curriculum covering Census Income classification, MovieLens association rule mining (Apriori), and customer segmentation with K-Means clustering.

PythonJupyterScikit-LearnPandas+5

K-Means Clusters & Centroids

Tech Stack

The Toolkit

Technologies I use to turn complex workflows into reliable, useful products.

Backend

Node.jsJava (Spring Boot/MVC)REST APIsMicroservices

Frontend

React.jsReact NativeAngularNext.js

Databases

SQL ServerMySQLPostgreSQL

Tools & Platforms

DockerGitLinuxWindowsWhatsApp Business APIPayment gatewaysSAP integration

Blockchain/Web3

SolidityHardhatPolygonSmart ContractsNFT Minting

Languages

JavaScript/TypeScriptJavaSolidityGolangPHPPythonC++SQL

Beyond Coding

Certifications & Leadership

Certifications

IELTS Certification

British Council - Band Score 7.0 (Jan 2025 - Jan 2027)

Applied Scrum for Agile Project Management

University of Maryland, edX (Mar 2024)

Microsoft Azure AI Fundamentals: AI Overview

Microsoft (Feb 2024)

Business Presentation Skills

PPM Manajemen (Nov 2023)

React Native, React JS, and Golang

Enigma Camp (Apr - Jun 2023)

Intensive German Language Course A1 and A2

Mercator Science & Education (2018 - 2019)

Leadership & Service

Person in Charge

Interweek - Managed schedule and finance of a university futsal competition (2018)

Person in Charge

Disciplinary Commission FTUI - Oversaw discipline during student orientation (2018)

Staff

Health and Safety at Universitas Indonesia Olympics (2016)

Member

Student Consultative Assembly FTUI (2016 - 2017)

Liaison Officer

Labsproject - Coordinated communication between two organizations (2015)

Chief Operational Officer

Vashka Company - Managed operational activities (2014)

Contact

Get In Touch

GitHub LinkedIn irfanrahmanindra@gmail.com