Ray J.

VIDA was established in 2018 to provide identity verification, digital signatures, and strong authentication products for businesses and individuals. VIDA provides legal assurance to ensure that people are who they claim to be — and that these people continue to be trustworthy.
VIDA operates as a Certificate Authority (CA), licensed, certified, and rooted in Indonesia by the Ministry of ICT (Kominfo) to issue legally binding Digital IDs and digital signatures to individuals and institutions. We biometrically validate identities against authoritative sources, such as the Indonesian National Identity Database (Dukcapil eKTP) and Singapore National Digital Identity databases.

Developed major functions such as signature generation, xendit payment, envelope sending, etc.
Support for front-end and testing teams.
Did some code review work.

Java, Spring boot, Mysql, Redis, Xendit, Signature Konwledge, KeyCloak, Spring boot security

Transferring data from contentstack, and implementing caching functions.

Building project architecture, basic library, basic methodology
Connect to content stack platform and provide api
Adding cache to GET type requests

Java, Spring boot, Redis, content stack sdk

MOST Mandiri Sekuritas is an easy, friendly and secure platform to manage your stock and mutual fund investment directly in your hand.

Building the application infrastructure.
Build basic components that are commonly used in applications.
Develop watchlist, stock detail, order book, transaction etc.
Provide technical leadership to team members through coaching and mentorship.
Optimizing app performance(Contains optimizations for high memory and high cpu).

Kotlin, JavaFX, Retrofit, RxJava3, H2, EasyBind, Controlsfx, Jfoenix, Koin

This friendly and secure platform, for bank stock operators to better manipulate stocks and manage assets. Main modules included: Stock Market(Realtime Data, Chart indicator, Auto Order, News, etc), Watchlist, Asset Management, Transaction details, Setting.

Participate in pre-start technical risk assessment of the project
Responsible for the development team on the day-to-day progress on the development and address any hurdles on the project development activity.
Participate in requirements budget estimation, development, testing, support and documentation
Solved performance issues during development and testing（Like high cpu usage, and high memory usage）

Kotlin, JavaFX, MVVM, Retrofit, RxJava3, H2, Gradle, Koin, Jfoenix, Controlsfx, Jenkins for windows app build, bitrise for mac app build, Jprofiler

Exclusive community of innovation enablers in SEA & other growth markets.

Building project architecture, basic library, basic methodology.
Develop For chat function.
Develop for home screen.
Resolve difficult technical issues that arise within the team(checking for memory leaks, screen lag etc).

Kotlin, Clean, MVVM, Retrofit, Glide, Firbase, Jenkins, Koin

This app is a software used internally by Imaginato. contain, Includes Meeting room booking, KPI audit, Contact ...

Developed Director and CEO approval interface
Develop For me detail interface
Develop a contact module and implement the cache.
Optimize the ui of app meeting room module
Addressed existing bugs

Dart, Flutter, flutter_bloc, Sqlite

Welma is a mobile application from BCA that is used to get information about BCA wealth products, view portfolios and investment transactions. BCA's wealth products are Mutual Funds, Bonds and Insurance.

Developed SBN registration, Pasar perdana, Reset password , redemption Obligasi and Leave contact
Use SafetyNet to check whether the device is rooted and the operating environment is safe. Make sure the app is running in a safe environment
Addressed existing bugs (not merely fixing the bug itself but finding the root cause).
Fixed critical production issues.
Provide solutions for how to use apps on huawei device without google-service.
Development based on huawei map kit to achieve map positioning, road map
Conducted high-efficient communications with team, quickly responded and active in helping teammates

Java, Android SDK, Realm, Retrofit, Glide, ButterKnife,Firebase, Google Map, SafeNet, RSA encrypt, Jenkins, Sonarqube

Fundsup is the app for early-stage investors, revolutionizing how to discover new deals.Never again miss opportunities you should have invested in. Fundsup instantly connects you with promising companies that match your purpose. Anytime. Anywhere. Our mission is to take the friction out of early-stage fundraising through data-driven matchmaking.

The combination of clean architecture and mvvm, and the use of DI framework dagger2 to inject objects, build a highly stable, low coupling, easy to expand, easy to test infrastructure
Developed the discovery screen. Investors can drag the card to the left or right on the discovery page to realize that they are not interested or interested
Developed company details page, investors can see basic information, videos, documents and data reports on this page
Developed chat function based on quickblox. Investors can also communicate with startups more conveniently
Use leakcanary and android profiler to detect and fixed them, reducing crashes caused by memory leaks by 99%
Conducted code review, set coding standard for team, such as naming convention, Incorrect code template and correct code template and help team with understanding business logic.

Java, Android SDK, Room, Retrofit, Glide, ButterKnife, RxJava2, Quickblox, Dagger2, LeakCanary, Live data, InApp purchases, Firebase, Google place, AndroidX, Lifecycles, Navigation, Analyst, Crashlytics

Go Shop is a new multiple platform lifestyle shopping destination that is revolutionising the local retail industry. It makes shopping fun and entertaining anytime, anywhere.

Developed using server-driven UI to implement dynamic screen framework, 90% on the screen in the app is dynamic and their UI and actions depend on the data returned by the server
Developed unit testing script by use of Junit and Mockito, with coverage of over 30%, which greatly reduced crash rate.
Built video function with SDK of JWPlayer, which supports recording and live broadcast
Implemented user tracking via GTM (Google Tag Manager), which provides better user analysis
Conducted peer code reviews of middle colleagues.

Java, Android SDK, Realm, Retrofit, Glide, ButterKnife, RxJava, RxAndroid, Dagger2, LeakCanary, Crashlytics, pushwoosh, Mockito, Junit, Databinding

Bank on the go with BCA mobile app. Conduct non-cash transactions using BCA mobile banking (m-BCA) and BCA internet banking (KlikBCA Smartphone) whenever, wherever.

Developed transfer module, credit card management module and login module
Use SafetyNet to check whether the device is rooted and the operating environment is safe. Make sure the app is running in a safe environment
Developed credit card payment form dynamically generated, based on data returned by api
implemented SSL pinning, avoid man-in-the-middle attacks
Develop fingerprint login and use NFC to scan credit cards
Build sonarqube platform to analyze and fix code problems, improve code quality

Java, Android SDK, Firebase, Crashlytics, Retrofit, ButterKnife, RxJava2, RxAndroid, Dagger2, LeakCanary, NFC, Fingerprint, Glide, Realm, SSL+CA

Users can get a recommendation or search for a restaurant in the entire city, spend the balance to buy a meal, and of course, the user can purchase a plan and enjoy a discount.

Build AWS service (SES, Email);
Third party payment platform: Stripe;
Migration old AWS account to new account;
Create rate feature on order;
Add redis to reduce database expansion costs;
ElasticSearch to cache the home data;
Support send email business;
Provide pagination data to Backend;
Create monthly members, member suspended, auto-renew;
AES Encrypt third-party payment UserID;
Optimize homepage data from cache to support more filter conditions;
Code review for peer developers.

Java, Jersey-RESTful, NoSql, Redis, Maven, AWS-DynamoDB, JWT

The largest selection of pet food, pet treats and pet supplies in Hong Kong online and in-store that's - always good for life, always wholesome and always fun.

Mainly responsible for the design and development of the Android app architecture
Development of login, register, home page, category, search, shopping cart, and checkout module
Refactor the code to separate the business logic code and UI. Make the logic clearer, and easier to test

Adyen, Android SDK, Retrofit, Glide, ButterKnife, RxJava, RxAndroid, Dagger2, LeakCanary, Crashlytics

GEMFIVE is the premier Malaysian an online shopping destination where you can discover new brands, find the things you love and look out.

Designed and implemented the Android application framework based on the MVVM structural design pattern.
Lead and conducted code reviews
In charge of analyzing and implementing Android app performance optimizations
Development of shopping cart, checkout, category and user profile
Maintenance of the Android platform

Glide, ButterKnife, Java, Android SDK, Swlite, Volley, Okhttp, LeakCanary