Martin is available for hire
Hire MartinMartin Bebey
Verified Expert in Engineering
Software Engineer and Android Developer
Detroit, MI, United States
Toptal member since August 14, 2025
Bio
Martin is a senior Android engineer with top-secret security clearance and over 10 years of experience in Java, Kotlin, and Jetpack Compose. Leveraging deep expertise in mobile architecture, CI/CD, testing, optimization, security, and observability, he has a proven track record of leading cross-functional teams. Martin consistently delivers scalable, accessible, high-quality applications across global industries, including automotive, sports, and national defense.
Portfolio
Freelancer
Android Jetpack, Slack, Figma, Teams, Visual Studio Code (VS Code)...
Yahoo!
Android, Kotlin, Jetpack Compose, Coroutines, Mobile Development, RxJava, Flux...
Stellantis
Java, Kotlin, Jetpack Compose, RESTFul APIs, XML, JSON, Git, Android...
Experience
- Windows - 16 years
- Git - 14 years
- Android - 12 years
- Model View ViewModel (MVVM) - 10 years
- Kotlin - 9 years
- RESTFul APIs - 7 years
- CI/CD Pipelines - 6 years
- Jetpack Compose - 4 years
Work Experience
Lead Android Developer and Consultant
2016 - PRESENT
Freelancer
- Developed over 20 Android applications from scratch using XML and Jetpack Compose, delivering scalable, high-performance solutions.
- Built an Android application that eliminated process inefficiencies and boosted team performance.
- Enhanced a high-profile sports application by implementing features such as campaigns, store order processing and receipts, and media streaming for a well-known professional team.
Technologies: Android Jetpack, Slack, Figma, Teams, Visual Studio Code (VS Code), CI/CD Pipelines, GitLab, Swagger, Python, App UX, Design, Accessibility, Navigation, UI Automator, Security, Gradle, Model View ViewModel (MVVM), Firebase, Google Play Store, Dependency Injection, RoomDB, Encryption, Automation, MDM, Windows, PyCharm, Datadog, Android SDK, GitHub, Google Play Console, Software Architecture, Technical Leadership, Android Architecture, Code Refactoring, Dependency Management, ExoPlayer, Android TV, Artificial Intelligence (AI)
Android Developer
2025 - 2026
Yahoo!
- Helped increase monthly revenue by 15x in 2026 by improving monetization features such as ad-related accessibility components.
- Implemented the in-app update feature/integration with the Play Store.
- Reduced build time by 4x by migrating from kapt to ksp, applying caching configs, and other improvements.
- Supported the successful business acquisition of AOL from Yahoo! by a third party.
Technologies: Android, Kotlin, Jetpack Compose, Coroutines, Mobile Development, RxJava, Flux, Android TV Wrapper, Artificial Intelligence (AI)
Senior Android Developer
2019 - 2024
Stellantis
- Migrated legacy Java applications to Kotlin, adopting XML and Jetpack Compose to improve maintainability, performance, and user experience.
- Optimized asset usage by removing the need for hundreds of resource files, which significantly reduced the application's memory footprint and improved performance and screen transitions by 2x.
- Improved UI rendering performance by implementing a more efficient animation handling method.
- Oversaw sprint planning, reviewed pull requests, and trained the team on new tools and processes, enabling the timely and successful release of the software.
Technologies: Java, Kotlin, Jetpack Compose, RESTFul APIs, XML, JSON, Git, Android, Android Studio, Eclipse, SourceTree, Jira, SonarQube, CI/CD Pipelines, Figma, Confluence, Jenkins, JUnit, Hilt, RoomDB, Espresso, Mockito, Retrofit, RxJava, Glide, Color Palettes, Data Binding, LiveData, Widgets, Dagger, Coroutines, Flow, Android SDK, GitHub, Software Architecture, Technical Leadership, Android Architecture, Code Refactoring, Dependency Management, ExoPlayer
Android Developer II
2018 - 2019
Stellantis
- Improved the quality of the app fleet by fixing all bugs and conducting production testing in the field.
- Provided production support for legacy apps built in Java by addressing customer concerns, fixing bugs, and releasing updates, making them more stable for users worldwide.
- Migrated the codebase for legacy projects from Java to Kotlin XML (and later to Jetpack Compose).
- Launched two key projects by starting the development of new applications from scratch.
Technologies: Kotlin, XML, Java, Android SDK, Git, Android, Android Studio, Jira, Confluence, Eclipse, Figma, Jenkins, Software QA, Software Testing, Software Engineering, Navigation, CI/CD Pipelines, Design, Gradle, Model View ViewModel (MVVM), Accessibility, Teams, Google Hangouts, SonarQube, SourceTree, Data Binding, Android Data Binding, GitHub, Software Architecture, Technical Leadership, Android Architecture, Code Refactoring, Dependency Management, ExoPlayer
Android Multimedia Software Engineer
2014 - 2018
Hyundai Motor Company
- Engineered an in-house application to track and manage team tasks related to company products, improving visibility and coordination.
- Uncovered high-priority type A bugs in the global market, documented findings, and produced reports, substantially improving product stability in production and reducing the crash rate by 90%.
- Directed key business trips domestically and abroad, resulting in measurable team productivity and performance improvements.
- Created and delivered training on new processes and tools, enabling the team to adopt them effectively.
Technologies: C#, Python, SQL, Git, Android, UML, Visual Studio, Java, Kotlin, Android Studio, Android SDK, GitHub, Software Architecture, Android Architecture, Code Refactoring, Dependency Management
Project History
AI App
https://github.com/martinbebey/ai-assistant/tree/masterThis Android app uses AI powered features to respond to prompts by the user. Users can prompt by typing in text or speaking or selecting an image from the file picker. The underlying model can be switched or customized. Default is gemini-3.1-flash-lite
Chatbot
https://github.com/martinbebey/firebase-chatbotI developed an Android chat application using Firebase, allowing users to create and join multiple chat rooms and exchange messages. All users, rooms, and messages are stored in Firebase Cloud, enabling real-time communication within each room.
Music App
https://github.com/martinbebey/music_appI architected an Android music application similar to Spotify, featuring navigation and slide-out menus that allow users to browse the music library by categories such as new releases, favorites, and top-rated tracks. Users can also manage settings, update subscriptions, and add multiple accounts.
Drawing App
https://github.com/martinbebey/drawing-appI built an Android drawing application that allows users to draw on a blank canvas or overlay an image background. The app includes a variety of brush sizes and colors, an undo feature, and a save function that preserves the entire canvas, including the background image, directly to the device. Users can also share their creations via apps such as WhatsApp, Messenger, and email.
Weather App
https://github.com/martinbebey/waether-appI developed an Android weather app using Jetpack Compose that displays local weather conditions. Users can search for any city worldwide to view the current weather and additional detailed information.
Deals List
https://github.com/martinbebey/deals_listI constructed an Android shopping deals app featuring a list view and detailed pages for selected items. Built with MVVM architecture and Jetpack Compose, the app incorporates enhanced security via Gradle and ProGuard, automated QA testing, a CI pipeline, and reliability optimizations, including CPU and memory monitoring.
Wish App
https://github.com/martinbebey/wisht_list_appI engineered an Android wish list app using Jetpack Compose and RoomDB, featuring navigation controls with composables. Users can add, edit, or swipe to delete wishes, with all data persistently stored in the Room database.
Connected Recipe
https://github.com/martinbebey/connected_recipe_appI developed an Android recipe app using Jetpack Compose, Retrofit, coroutines, and multithreading to fetch recipes from the internet. The app features JSON serialization, deserialization, and navigation, allowing users to browse meals and view detailed preparation instructions.
Store Locator
https://github.com/martinbebey/store-locatorI built an Android app that allows users to search for nearby stores by entering a zip code or using their current location. The app features a search bar and displays a list of stores along with their distance from the user and the city in which they are located.
Quiz App
https://github.com/martinbebey/quiz-appI crafted an Android quiz app that presents questions with multiple-choice options and displays results at the end. After each selection, the app highlights the user's choice and indicates the correct answer if it differs.
Cornhole Game
https://github.com/martinbebey/cornhole_gameI developed a simple cornhole scoring application. In cornhole, teams of two players compete by throwing bags of corn onto a board with a hole. Each round consists of four throws per team. Bags that land on the ground earn no points, bags on the board earn one point, and bags that go in the hole earn three points. At the end of each round, the team with the higher score wins the round and adds the point difference to their total score.
Age in Minutes
https://github.com/martinbebey/age-in-minutesI developed an Android app that allows users to select their date of birth using a calendar or time picker. The app then calculates and displays their current age in minutes, with constraints to prevent selecting future dates.
Art Book
https://github.com/martinbebey/Art_Book_App_TestI developed an Android app that lets users search the web for paintings in real time as they type. Users can select results to add to their personal collection, providing details such as the painting's name, year, and artist. The collection is stored in a database for persistent access and easy management.
Education
2014 - 2016
Master's Degree in Computer Science
Western Michigan University - Kalamazoo, MI, USA
2011 - 2013
Bachelor's Degree in Computer Science
Trent University - Ontario, Canada
Certifications
AUGUST 2017 - PRESENT
Software Quality Assurance (SQA)
ISTQB
Skills
Libraries/APIs
Retrofit, LiveData, RxJava
Tools
Android Studio, Git, Jira, Figma, Android Jetpack, GitHub, PyCharm, Visual Studio, Flow, GitLab, Gradle, ExoPlayer, SourceTree, SonarQube, Confluence, Jenkins, Slack, Canvas, Google Hangouts, Chatbox, Claude
Languages
Kotlin, XML, C#, SQL, UML, Java, Python
Frameworks
Kotlin Serialization, Dagger, Swagger, Android SDK, JUnit, Espresso, Mockito, Glide, Flux
Paradigms
Software Testing, Model View ViewModel (MVVM), Code Refactoring, Dependency Injection, Automation, Mobile Development
Platforms
Windows, Android, Eclipse, Android TV, Firebase, Visual Studio Code (VS Code)
Storage
JSON, RoomDB, Datadog
Other
Software Engineering, Jetpack Compose, RESTFul APIs, Coroutines, Accessibility, Software QA, Room, Pop-ups, Screens, Android Data Binding, Software Architecture, Technical Leadership, Android Architecture, Dependency Management, CI/CD Pipelines, Hilt, Data Binding, App UX, Design, Navigation, UI Automator, Security, Encryption, Media, Storage, QA Automation, Reliability, Optimization, Thread Scheduling, Background Threading, Processing & Threading, Artificial Intelligence (AI), Color Palettes, Widgets, Teams, Google Play Store, MDM, Google Play Console, Text-to-Speech (TTS), Gemini, Voice, Images, Gemini API, Streaming, OpenAI GPT-3 API, Android TV Wrapper
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