JonathanJonathan Suhangita
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React Native developer · Tangerang, Indonesia

Mobile apps for small businesses and startups, built to launch and explained every step of the way.

I design and build iOS and Android apps for small businesses and startups. Years of teaching programming taught me to communicate clearly, so you always know what's happening, why, and what comes next.

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The Gym Pod
The Gym Pod store image, a 24-hour mini gym
KAWAN by WOM Finance
KAWAN by WOM Finance store image, app overview
movus
movus store image, home screen with cars
Featured · The Gym PodTangerang, Indonesia

Work

Apps I've designed and built for businesses. Screenshots, results, and store links are in brackets until the real ones are added.

Immortals Pte Ltd · Singapore

The Gym Pod

React Native Front End Developer · Full-time · Apr 2020–present

A 24/7 automated gym app with Stripe and Shopee Pay payments.

The Gym Pod is the production app I have owned for Immortals Pte Ltd since April 2020. I built it from scratch, shipped it to the App Store and Google Play, and I still maintain it for real users on iOS and Android. The LFG Pod was built in the same role.

It is a React Native app with a reusable, scalable component architecture, so the interface can grow without a rewrite. Stripe, Shopee Pay, Google APIs, and the internal backend are integrated into that structure.

I work with the backend engineers and the UI/UX designers, and I manage version control so each release onto the App Store and Play Store stays clean. Unit tests are part of that discipline.

Keeping it stable is the long-term work. Sentry and Firebase Crashlytics monitor crashes, and debugging plus performance profiling is how I track problems down and make the app more reliable. That maintenance has run from April 2020 to now.

  • React Native
  • Stripe
  • Shopee Pay
  • Firebase
  • iOS
  • Android

Read the case study

The Gym Pod store image, a 24-hour mini gym
The Gym Pod store image, pay-per-use booking
The Gym Pod store image, booking a pod remotely
The Gym Pod store image, unlocking the door
The Gym Pod store image, workout guides

PT Wahana Ottomitra Multiartha Tbk

KAWAN by WOM Finance

Front End Engineer Specialist

A fintech app built to OJK regulatory standards, with fingerprint login.

KAWAN is WOM Finance's official customer financing app. PT Wahana Ottomitra Multiartha Tbk is a lender licensed and supervised by OJK, and the app launched in February 2022 so people can use those services without visiting a branch. I built the app and I maintained it.

It covers multipurpose loans secured by a motorbike's or car's ownership papers (BPKB), through the Motorku and MobilKu products, and financing for a new motorbike. A customer can find the nearest branch, run a financing simulator, apply, pay installments, track an application, open a contract profile (Profil Kontrak), and see benefit points and promos.

I owned the React Native app, including the flows that have to meet OJK rules. I added fingerprint login and redesigned key screens.

Stability is the maintenance. I fixed critical bugs in the production app so a failure does not stay in front of a customer.

  • React Native
  • Biometric auth
  • OJK-compliant flows
  • iOS
  • Android
Get it on Google Play (opens in a new tab)

Read the case study

KAWAN by WOM Finance store image, app overview
KAWAN by WOM Finance store image, contract profile and payments menu

PT Movus Technologies

movus

Senior Front End Engineer

A vehicle-financing app with Xendit payments and Firebase.

movus is a vehicle-financing app, and it is also a rent-to-own subscription for ride-hailing drivers on Grab and Gojek in Indonesia. I owned the mobile development.

A driver who cannot get a normal car loan subscribes to an eco-friendly car, pays monthly, and owns it after about five years. Insurance, servicing, and tax renewal are included, and daily or weekly rental is offered as well.

Getting a car is four easy steps: upload a KTP and supporting documents, pass the document check, book a survey, and choose a car. Handover comes after that. I built that flow in React Native, with Xendit for payments and Firebase behind the app.

I took the app from the spec through to the store release, and I maintained the Android deployments after launch. Those ongoing releases are how the app stays stable for drivers.

  • React Native
  • Firebase
  • Xendit
  • Android
  • Android
Get it on Google Play (opens in a new tab)

Read the case study

movus store image, home screen with cars
movus store image, car detail
movus store image, payment methods

PT Amber Media Sosial · Tangerang, Indonesia

Daily Act

Frontend Developer · Apr 2019–Jul 2020

A social habit-tracking app.

Daily Act is the social habit-tracking app I built for PT Amber Media Sosial in Tangerang, from April 2019 to July 2020. I owned the interface: the UI/UX team's high-fidelity mockups became the screens people used.

I built it in React Native. The work was pixel-perfect interfaces, custom animations, and interactive components, with Redux managing the app's state.

The backend was part of the same job. I integrated the APIs and kept the data handling smooth, inside structured development cycles that cut down merge conflicts and sped up delivery.

Once the builds were in production, I supported debugging and issue resolution so problems did not stay in the app. That maintenance ran through July 2020.

  • React Native
  • Redux
  • REST APIs

Read the case study

Daily Act store image

Services & pricing

Fixed scopes, with prices in IDR. These are starting points. The quote follows the plan we agree on.

App MVP

The core features of a startup's app, built to test the idea.

Roughly 6–10 weeks

Starting from

Rp15.000.000

Business App

A full iOS + Android app for a small business (booking, ordering, loyalty).

Roughly 8–14 weeks

Starting from

Rp30.000.000

Care & Handover

Updates, fixes, and new features after launch, plus training so the client's team understands the app. Includes ~2–3 hours/month.

Ongoing

Starting from

Rp750.000/month

Extra work. Rp200.000–250.000/hour.

Server costs and App Store / Google Play fees are billed separately.

Not sure which fits? Book a free call and I'll help you pick.

Book a free call (opens in a new tab)

How we'll work together

  1. 01

    Free call

    We talk through your idea, goals, and budget in 20–30 minutes. No commitment, just an honest take on what's possible.

  2. 02

    Plan & quote

    A clear scope with features, timeline, and a fixed price, so there are no surprises.

  3. 03

    Design

    You see how the app will look and flow before any code is written, and we adjust together.

  4. 04

    Build

    I build your iOS and Android app and send a progress update and test build every week.

  5. 05

    Launch

    I publish to the App Store and Google Play and make sure everything runs smoothly on day one.

  6. 06

    Handover & support

    I walk you and your team through how the app works, then stay around for fixes and new features if you want.

Because I've taught programming for years, I explain things in plain language, with no tech jargon, at every step.

Jonathan Suhangita

Hi, I'm Jonathan

I'm a React Native developer based in Tangerang, and I've spent the last 6 years building mobile apps that real businesses use every day, including a 24/7 gym app for a Singapore company and a fintech app for WOM Finance that's regulated by OJK. I've integrated payments with Stripe, Xendit, and Shopee Pay, set up biometric login, and taken apps all the way to the App Store and Google Play.

Before freelancing, I taught programming. I mentored students at Swiss German University, led a game-programming workshop at Tzu Chi School PIK, and still mentor on Dealls. Teaching taught me to explain technical things in plain language, so you'll always know what's being built and why.

I studied Informatics at Universitas Pelita Harapan. Outside of code, you'll find me playing tennis or trying a new café.

What I work with

React Native · React · Next.js · Node.js · Firebase · Stripe · Xendit · Shopee Pay

Jonathan Suhangita presenting a Good UI lecture with a microphone at UKRIDAGuest lecture at UKRIDA, October 2026See teaching

Experience & teaching

Teaching is where I learned to explain every step in plain language.

  1. Apr 2020–presentSingapore

    React Native Front End Developer

    The Gym Pod · Immortals Pte Ltd

    Full-time. I maintain the app on the App Store and Google Play, write clean code with unit tests, fix bugs, and integrate APIs. Payments run through Stripe and Shopee Pay.

  2. Apr 2019–Jul 2020Tangerang, Indonesia

    Frontend Developer

    Daily Act · PT Amber Media Sosial

    I built the interface to match the UI/UX team's mockups pixel for pixel, added the custom animations they asked for, and used Redux to manage the app's state.

  3. Oct 2026Jakarta

    Guest Lecturer

    UKRIDA (Universitas Kristen Krida Wacana)

    Web Programming class, on UI/UX design.

  4. Dec 2018–Jan 2019Tangerang

    Instructor / Mentor

    Swiss German University

    Part-time. I mentored a course on app programming with MIT App Inventor and game programming with Construct 2.

  5. May–Jul 2018Tangerang

    Workshop Instructor

    Swiss German University

    Internship, taught in English. I introduced mobile apps with MIT App Inventor 2, games with Construct 3, and web programming with Bubble.is, for students at Mentari Intercultural Secondary School Jakarta, Tzu Chi Secondary School PIK, and the SGU summer course.

  6. 23–27 Jul 2018

    Workshop Lead

    Tzu Chi Secondary School, Pantai Indah Kapuk

    I led a workshop on web programming fundamentals with Bubble, and taught game programming with Roblox Studio.

  7. Mentor

    Dealls

    I still mentor on Dealls.

Contact

Book a free call, or send a note about the app you want to build. I reply with an honest take on what's possible.

Book a free call (opens in a new tab)

Based in Tangerang, Indonesia.

Email
jsuhangita@gmail.com
Phone
+62 895-6152-63582
WhatsApp
+62 895-6152-63582 (opens in a new tab)
LinkedIn
jonathan-suhangita (opens in a new tab)
GitHub
jsuhangita (opens in a new tab)

Book a free call

20–30 minutes. No commitment, just an honest take on what's possible.

Book a free call (opens in a new tab)