Projects - Andrel Karunia Sitanggang

My Projects

A collection of mobile apps, web applications, and open-source contributions I've built over the years.

UangCermat Mobile App

2022-2024

PT Gajicermat Mandiri Digital Indonesia

Finance service mobile application for lending and financial management. Built with React Native and TypeScript for iOS and Android platforms.

  • Cross-platform mobile app for finance service
  • Integrated complex form validation with Formik
  • Implemented real-time data with React Query
  • iOS and Android deployment
React NativeTypeScriptReact QueryNative Modules

KerjaCermat Mobile App

2023-2024

PT Gajicermat Mandiri Digital Indonesia

HRIS service mobile application for employee management, attendance, payroll, and HR processes.

  • Employee self-service mobile app
  • Attendance and leave management
  • Payroll information access
  • Push notifications integration
React NativeTypeScriptReduxFormik

HRIS Internal Web Apps

2023

PT Gajicermat Mandiri Digital Indonesia

Two internal web applications for HR management built with Next.js, providing administrative tools for employee data management.

  • Admin dashboard for HR operations
  • Employee data management
  • Report generation
  • Role-based access control
Next.jsTypeScriptTailwind CSSReact Query

Finance Internal Web Apps

2022-2023

PT Gajicermat Mandiri Digital Indonesia

Two web applications for internal finance operations using Next.js, plus one React.js app for financial services.

  • Financial operations dashboard
  • Transaction monitoring
  • Analytics and reporting
  • Real-time data visualization
Next.jsReact.jsTypeScriptChart.js

Tokodistributor Web Platform

2019-2021

Tokodistributor

B2B marketplace web platform rewritten in React 16. Achieved significant performance improvements and SEO optimization.

  • Improved PageSpeed from 35 to 90 points
  • Implemented comprehensive SEO with schema markup
  • Built PWA with offline mode
  • Integrated chat features (Qiscus, Sendbird)
  • Rewrote entire desktop platform to React
React 16ReduxSEOPWAFramework7

Tokodistributor Mobile Web

2020-2021

Tokodistributor

Progressive Web App for mobile users built with Framework7 React, providing native-like experience.

  • PWA with offline capabilities
  • Mobile-first design
  • App-like navigation
  • Performance optimized for mobile
Framework7 ReactPWAService Workers

Open Source Contributions

2020-2021

Open Source Community

Various contributions to open-source projects including React.js ID, DuckDuckGo, HospitalRun, and Tailwind Components.

  • Fixed bugs in HospitalRun frontend
  • Created Tailwind CSS components
  • Contributed to Vest validation library
  • Community documentation
React.jsTailwind CSSJavaScriptDocumentation
10+
Projects Delivered
5+
Mobile Apps
5+
Web Apps
5+
Years Experience

Have a project in mind?

Let's discuss how I can help bring your ideas to life.

<Andrel Karunia Sitanggang/>

Software Engineer | React Specialist

© 2025 Andrel Karunia Sitanggang. All rights reserved.