Profile - Andrel Karunia Sitanggang

About Me

Software Engineer with 5+ years of experience building high-performance web and mobile applications. Specialized in React ecosystem with a track record of delivering impactful projects.

Experience

Software Engineer

PT Gajicermat Mandiri Digital Indonesia

📅 Jan 2022 - Present (3+ years)📍 Jakarta Selatan, IndonesiaFull-time
  • Built 2 mobile apps using React Native for Finance Service (UangCermat and internal app)
  • Developed 2 web apps using Next.js for Finance Service (internal tools)
  • Created 1 web app using React.js for Finance Service
  • Built 2 web apps using Next.js for HRIS Service (internal tools)
  • Developed 3 mobile apps using React Native for HRIS Service (KerjaCermat and 2 internal apps)
  • Currently working on iOS app development
  • Completed fast-pace Epic Ticket in two-week deadline to build new financial service app
React NativeTypeScriptFormikReact QueryNext.jsiOS Development

Frontend Web Developer

Tokodistributor - B2B Marketplace

📅 Apr 2019 - Dec 2021 (2 years 9 months)📍 Jakarta, IndonesiaFull-time
  • Improved web performance: Homepage from 35 to 80 PageSpeed score
  • Implemented PWA integration with Framework7 React
  • Rewrote desktop web platform to React 16
  • Optimized SEO with schema markup and dynamic meta tags
  • Integrated chatting features (Qiscus, Sendbird)
  • Built product detail, category, cart, and checkout flows
  • Implemented offline mode and Google Analytics
  • Achieved PageSpeed scores of 90+ on multiple pages
React.jsReduxVue.jsSEOPWAPerformance Optimization

React Developer

Satu Pintu Kemenparekraf

📅 May 2021 (1 month)📍 Jakarta Timur, IndonesiaFreelance
  • Repaired existing platform
React.js

React Developer

Skillomo

📅 Apr 2021 (1 month)📍 Jakarta Timur, IndonesiaFreelance
  • Initiated Skillomo React.js learner platform
React.js

Individual Contributor

Open Source

📅 Jul 2020 - Apr 2021 (10 months)Open Source
  • Contributed to React.js ID community
  • Contributed to DuckDuckGo
  • Created components on tailwindcomponents.com
  • Fixed issues in Vest validation library
  • Fixed labels in HospitalRun frontend
  • Maintained personal projects on GitHub
Open SourceReact.jsTailwind CSS

Education

🎓

Universitas Gadjah Mada (UGM)

Associate's Degree - Elektronika dan Instrumentasi

📅 2013 - 2017

Activities: BEM KM UGM, Gadjah Mada Menginspirasi, Paguyuban SOSMAS UGM

Core Competencies

Frontend Development

  • • React.js & React Native
  • • TypeScript & JavaScript
  • • Next.js & Gatsby
  • • State Management (Redux, React Query)
  • • Tailwind CSS & Styled Components

Performance & SEO

  • • Web Performance Optimization
  • • SEO & Schema Markup
  • • Progressive Web Apps (PWA)
  • • Accessibility (a11y)
  • • Mobile-First Development

Mobile Development

  • • iOS & Android Development
  • • React Native CLI & Expo
  • • Native Module Integration
  • • App Store Deployment
  • • Cross-platform Architecture

Tools & Practices

  • • Git & GitHub
  • • CI/CD Pipelines
  • • Agile Development
  • • Code Review & Mentoring
  • • Testing (Jest, React Testing Library)

Interested in working together?

I'm always open to discussing new projects and opportunities.

<Andrel Karunia Sitanggang/>

Software Engineer | React Specialist

© 2025 Andrel Karunia Sitanggang. All rights reserved.