jimmy leonardo

About Me

Hi, my name is Jimmy Leonardo. I specialize in mobile development using Kotlin and Flutter, as well as website development with PHP and the Laravel framework.

My experience spans multiple industries, including fintech, e-commerce, loyalty programs, and telecommunications.

Linked In

Android / iOS Development

95%

Website Development

95%

Photography

85%

Services

Mobile Development

Android and iOS Application

Web Development

Responsive Website Application

Photography

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Experience

2023 - 2025

PT. Horego Untuk Indonesia

Senior Android Developer

Developed an Android application called HOREGO using Kotlin and Jetpack Compose, focusing on security, reliability, and ensuring the application is bug-free and error-free.
Integrated the application with APIs and WebSockets using Retrofit.
Integrated the application with marketing tools such as: CleverTap, PostHog, Appsflyers, MixPanel.
Implemented CI/CD (Continuous Integration/Continuous Delivery) using Microsoft Azure.
Integrated heatmap tracking using Microsoft Clarity.
Secured the application with Shield SDK, Dex Protector, and ProGuard to prevent reverse engineering.
Created unit testing, UI testing, API mocking, and linting using Mockito, Espresso, JaCoCo, and Detekt.
Optimized performance with Crashlytics, achieving a 99.8% crash-free rate for the HOREGO application.
Developed a vouchers and deals features.
Implemented a payment system using Xendit Payment Gateway and QBIZ, supporting credit cards and QRIS.

2016 - 2023

PT. Global Pay Indonesia / CASHBAC

Senior Android Developer

Created UANGKU, an e-wallet application that allowed users to top up and pay bills via balance or PayByQR SDK. Developed PayByQR, an SDK-based QR payment solution integrated into partner applications. Used by 25+ bank issuers and e-money providers, PayByQR pioneered QR-based payments in Indonesia (QRIS) before Bank Indonesia established a national standard. UANGKU and PayByQR bought by Traveloka.
Created Cashbac application and the "Tap to Pay" payment system, integrating multiple payment channels. Enabled users to pay at merchants using Beacon and QR Code scanning technology.
Created Cashbac Biz, a POS system for the Cashbac app, available as an Android application and PWA.
Developed Android applications called CASHBAC and CASHBAC BIZ using Java and Kotlin, focusing on security, reliability, and ensuring the applications are bug-free and error-free.
Integrated the applications with APIs and WebSockets using Retrofit and Volley.
Integrated the application with marketing tools such as: CleverTap, PostHog, Appsflyers, MixPanel.
Integrated the application with A/B Testing for analytics.
Implemented CI/CD (Continuous Integration/Continuous Delivery) using Microsoft Azure.
Integrated heatmap tracking using Microsoft Clarity.
Secured the applications with Shield SDK, Dex Protector, and ProGuard to prevent reverse engineering.
Created unit testing, UI testing, API mocking, and linting using Mockito, Espresso, JaCoCo, and Detekt.
Optimized performance with Crashlytics, achieving a 99.6% crash-free rate for CASHBAC and CASHBAC BIZ.
Developed a vouchers/deals feature.
Implemented a payment system using the Xendit Payment Gateway.
Integrated the applications with multiple payment channels, including Credit cards, Debit cards, Dana, Linkaja, ShopeePay, OVO, GoPay, JULO, Debit BCA, and Mandiri Direct Debit.
Developed the EASY PAY feature, similar to PayLater.
Developed a Flutter-based Android and iOS application, Corner's Card, serving as a loyalty system and white-label solution. It is still in use at FX Sudirman and 23 Paskal Shopping Center.
Created logic on Android to generate a unique ID, which reduced fraud by up to 85%.

2014 - 2016

PT. Internux / Bolt

Web & Mobile Developer

Developed an Android and iOS application called BOLT using Cordova and Ionic.
Built the frontend and backend systems for the BOLT website using Spring Boot and CodeIgniter.
Developed an IMEI Blacklist System for BOLT using CodeIgniter.
Integrate Mobile application with Modem's API (Huawei, ZTE).

2011 - 2014

PT. Integrasi Solutions

Website Developer

Created a desktop application called Market Risk and Liquidity Report System (MLR), a system used by Bank Danamon.
Developed a marketplace website application (Shopping.co.id) using the Symfony framework.
Built an Android application for FUJIFILM called Recognito, a face recognition system, using Java.
Developed an Android application for Astra called Otocare using Java.

2009 - 2011

PT. Sentra Solusi Informatika

Desktop Developer

Developed ITTOS, a tour and travel system in Indonesia, which includes a booking system, tour management system, accounting system, journaling, and report generation.

Other Achievements

Mobile & Website

Developed the Market Risk and Liquidity Report System (MLR) for Bank Danamon.
Built Otocare, the official Android application for Astra Company.
Built Recognito, an Android-based facial recognition application for FUJIFILM.
Built Jismo Education, a website and mobile app (Android & iOS) for Olympiad registrations.
Built a web-based application for Panin Asset Management, featuring a queuing system, barcode generation & scanning for attendance, a lucky draw system, and WhatsApp & email blasting.
Built a website for Alkisah Riomotret, showcased at Grand Indonesia.
Built a corporate website for Angkasa Pura II.
Built a Pesantren (Islamic School) Website, inaugurated by former President Susilo Bambang Yudhoyono.