Cristi Onisim Paval

A top-notch voice messenger on Android for a startup founded by participants from world-class companies.

The app design contains very complex animations by the world's top designers. I learned techniques from math and physics to get them to run perfectly.

This corporation oversees a group of more than ten home-appliance brands. It manufactures smart appliances, and all of them have common functionalities. The framework ensures that the core mobile applications meet customer expectations and are appropriately integrated during development.

Goals and Guiding Principles:
• Create one global platform customizable for a specific brand or product.
• Use open standards.
• Ensure interoperability, easy to connect with multiple ecosystems and partners.
• Make it highly configurable: faster time-to-market with low cost.
• Maximize the use of out-of-the-box, underlying platform components.
• Design for consumer-response time.
• Incorporate a superior customer experience in everything.
• Implement a mobile-friendly design regarding resource usage (small footprint in terms of battery, CPU, memory, network resilience, etc.).

I was one of 14 developers who contributed to this framework.

Technologies: Android Jetpack, Kotlin, Google Play services, WiFi, MQTT, Retrofit, MVVM, RxJava 2, Dagger 2, Realm Database, Moshi, and Data Binding.

A flutter-based app for end-customers owning a bike equipped with Classified wheels. The app connects to the bike via Bluetooth Low Energy, monitors its usage, upgrades the bike firmware, and enables different configurations for bike owners.

BuddyGuard’s product is called FLARE, a complete home security system in one device. Combining artificial intelligence with state-of-the-art hardware is what home security should be.

It is a very complex app with many use cases for users having different rights. I contributed to all features within the Android app.

The mobile app is the interface with the device. Users can see events from the device, update the settings, add new people who have access to their homes, see video live streams, and buy additional add-on packages to extend the functionality of FLARE.

Mobile App Design:
http://oberhaeuser.info/work/buddyguard-home-security.

Technologies: Android NDK tools, Java, Kotlin, Google Play Services, Geofencing, Bluetooth, Bluetooth Low Energy, P2P LiveStream, WebRTC, MQTT, Retrofit, MVVM, RxJava 2, Dagger 2, LiveData, Realm Database, In-app Payments (Stripe/PayPal), fingerprint and PIN login, QR Codes, Firebase, Jackson, and Git.

The sellers use the app in the process of cataloging a large volume of content. It is equipped with tools that enable more and more efficiency for customers, including reducing wait times in-between and removing unnecessary steps in the process.

This technology provides a seamless buying experience for the end-user: home buyers. It increases productivity for realtors by allowing them to manage 2-3x more clients and provides intelligence to brokerages, banks, and industry organizations alike.

I implemented both Android and iOS Apps, with features like in-app chat, live calendar, and many more features.

Technologies: Android, iOS, Kotlin, Swift, RxJava2, RxSwift, Firebase, Dagger2

Meertz is a shop that sells expensive watches for hobbyists. It is a beautifully designed app with complex offline logic. Everything has to be cached and functional even without any internet connection. I worked part-time on my own because I was curious about working with the Room database and RxJava2. I was also the only developer who implemented the app for Android.

Unfortunately, the application received a poor rating because customers were dissatisfied with the physical products delivered by the seller.

I developed small logic games that were designed to be preinstalled on Huawei devices.

Hungry to learn Kotlin, for a month I was involved part-time developing these small games. I was the only contributor to Unblock Puzzles. I also built Dots United except for the game board which was implemented by someone else.

A project designed to expand catalogs and books digitally. It contains features like a shop integration, audiovisual information, current event information, contact details of distributors, commission regulation for distribution partners, and a dialog via push messages.

On this project, I worked part time and I was responsible for refactoring the app and automating the build processes for different clients. Here I had the chance to use Gradle and create different flavors with separate configurations for every build.

The Magenta SmartHome app gives you a constant overview of your home—even while you’re on the move

I was one of the five Android developers working on that project. I was responsible for some of the features along with versions 3.7, 4.0, 4.1, and 4.2. Also, I handled the bug fixing in almost all app functionalities. It was a good opportunity to learn from the code written by other experienced developers. On that project, I learned to deal with synchronization and communication to interfaces from hardware devices.

Technologies: Android SDK Tools, Java, SVN, SQLite, Google Play Services, Google Analytics

This is an entertainment app that invites the user to enroll in different video contests and it had a complex UI with a lot of use cases.

I was curious about video processing so I took ownership of the create-new-video feature, dealing with camera and some video processing. For this feature, I worked with technologies like FFmpeg, OpenGL, and Iso4Parser.

This is a custom lock screen for Android devices. Smart-Unlock.it helps train yourself while unlocking your smartphone. It replaces your unlock screen with trivia from the package store. You can also customize the way your phone can be unlocked. For example, you can set the number of correct questions required before you can access your menu phone. Also, you can download free or paid packages containing questions from different subjects and different languages.

I was the only developer developing this app. I encountered some challenges when I had to implement in-app billing and data downloads. I had to work also with SQLCipher to encrypt all the local persisted data. In this project, I also wrote C code which was integrated as precompiled so libraries, to avoid reverse-engineering for some of the source code. It was intended to hide some logic for security reasons.

This app was made so that basketball fans can catch up on their team's stats, games, news, and so on.

App Features:
• Top news about the team, club, match reports and more
• Live scores for team games including play by play narration
• Game statistics
• Team schedule: all the past games including results, game statistics, and play-by-play ticker
• Schedule of BBL (German basketball league)
• Table and detailed statistics of the BBL
• Individual team member's information and stats
• Information on the team’s arena, club, and partners

I was the only developer on the project.