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My Android mobile application needs a brand-new feature added to the existing codebase. I will supply the current source (Kotlin/Java) and API documentation as soon as we start; your task is to design, code, test, and merge the new functionality while keeping everything else in the app fully operational. What I expect • Clean, well-commented code that fits the current architecture (MVVM with Jetpack components). • Smooth UI integration that matches the app’s present look and feel; if any minor layout tweaks are required to accommodate the feature, please include them. • Thorough testing—unit and instrumentation—so we avoid regressions before I push the update to Google Play. • A short change-log and an updated, signed AAB or APK ready for release. I’ll stay available for quick feedback cycles and can grant access to a staging backend if the feature touches live data. Future phases may cover broader UI/UX refinements and bug fixes, so doing this piece well could open the door to more work together. Tell me which libraries or tools you plan to use and roughly how long integration and testing will take once you have the repo.
Project ID: 40542834
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161 freelancers are bidding on average $460 USD for this job

Hello, My name is Omer, and I'm a seasoned app developer specializing in Android App Development, Java and Kotlin. Throughout my career, I've consistently exhibited the capacity to own projects from concept to deployment. This includes implementing new features without disrupting the existing codebase - something that your project precisely calls for. I understand your need for clean, scalable and well-commented code that fits into your current architecture of MVVM with Jetpack components. In addition, I'm proficient with testing rigorously (unit and instrumentation) to mitigate any chances of regression, so you can trust that the new feature will be seamlessly integrated with zero disruptions to the existing app functionality. Using my proficiency in Mobile Development, Backend Systems, and REST APIs, I will ensure smooth UI integration that matches your app's present look and feel. Any minor layout tweaks required will be comprehensively included as well. My skills in Maps, Location Services & real-time systems may also come in handy if it touches live data on the backend. Let's chat to proceed.
$470 USD in 10 days
8.9
8.9

Hello, Greetings Hope you are doing well. I am a Mobile Application developer with over 5 years of experience. I am confident in my ability and skills to develop high-quality Mobile apps and would like to work on your Android app project. I will complete the work as per your requirements. I want to discuss more this project to prepare the final concept. So let’s discuss this in detail over chat then will make plans to start work on it. Waiting for your earliest reply. Thanks. Shubham
$250 USD in 14 days
8.0
8.0

**LET'S ADD YOUR NEW ANDROID FEATURE WITHOUT IMPACTING THE STABILITY OF YOUR APP.** With 12+ years of experience in Android development, I can seamlessly integrate your new feature into the existing **Kotlin/Java MVVM** codebase while maintaining performance and code quality. I'll implement the feature following your current architecture, update the UI to match the existing design, integrate APIs if required, and perform thorough unit and instrumentation testing to prevent regressions. I'll also provide a changelog, clean documentation, and a release-ready signed AAB/APK. I typically use **Android Jetpack, Retrofit, Room, Coroutines, Hilt/Dagger, JUnit, Espresso, and Firebase** (if applicable). Once I review your repository and API documentation, I can provide an accurate timeline—most integrations and testing are completed within a few days, depending on complexity. Let's review your codebase and get this feature ready for Google Play. Thanks CHirtsina
$250 USD in 7 days
8.4
8.4

⭐⭐⭐⭐⭐ Add New Feature to Your Android App with Kotlin/Java ❇️ Hi My Friend, I hope you're doing well. I've reviewed your project requirements and noticed you're looking for someone to add a new feature to your Android app. Look no further; Zohaib is here to assist you! My team has successfully completed 50+ similar projects for Android app development. I will design, code, and test the new functionality while ensuring that everything else in the app remains fully operational. ➡️ Why Me? I can easily add the new feature to your app as I have 5 years of experience in Android development, focusing on Kotlin and Java. My expertise includes UI integration, MVVM architecture, and thorough testing. Additionally, I have a strong grip on Jetpack components and API integration, ensuring a smooth implementation for your project. ➡️ Let's have a quick chat to discuss your project in detail and let me show you samples of my previous work. I look forward to discussing this with you in our chat. ➡️ Skills & Experience: ✅ Android Development ✅ Kotlin Programming ✅ Java Programming ✅ MVVM Architecture ✅ Jetpack Components ✅ UI Integration ✅ API Integration ✅ Unit Testing ✅ Instrumentation Testing ✅ Code Review ✅ Debugging ✅ Version Control Waiting for your response! Best Regards, Zohaib
$350 USD in 2 days
7.9
7.9

I’d first review the existing MVVM flow, screen structure, API docs, and how state/errors are currently handled, then add the feature in the same pattern instead of forcing a new structure into the app. After that I’d wire the API layer, repository/use-case logic, ViewModel state, and UI changes so the feature feels native to the current Kotlin/Java codebase. For testing, I’d cover the business logic with unit tests and add instrumentation checks around the main user path, including empty states, API failure, loading behavior, and any auth/session edge cases. I’d also do a regression pass on nearby screens so the release build is safe before generating the signed AAB/APK. I’d likely use existing Jetpack components, Retrofit/OkHttp if already present, JUnit, Mockito/MockK, and Espresso. Once I see the repo, I can estimate integration/testing accurately. Ready to start with the source and API docs.
$500 USD in 7 days
7.1
7.1

Hi, I will implement the new feature in your Android application as per requirement. I am developing and deploying applications since 2019. Please message for more details. Thanks
$250 USD in 3 days
7.2
7.2

Hi, this reads like a straightforward Android extension task, but the real work is fitting a new capability into an existing MVVM flow without creating state, navigation, or regression issues around the current app behavior. I usually start by walking the current feature boundaries, view models, API touchpoints, and test coverage before deciding how the new functionality should enter the app. For this kind of Kotlin/Java codebase, the main risk is rarely the UI itself; it is unintended coupling across screens, repository logic, and release behavior. The closest relevant work here is Custom Feature Development & Integration, where I dropped into a live product, reviewed the codebase, added targeted functionality, and delivered tests plus deployment notes. The bug localization project is also relevant in terms of engineering discipline around correctness and maintainability. I typically design the change so UI, domain logic, and data access remain isolated, with regression coverage around the affected paths before packaging. If the feature touches live data, I would validate contract assumptions early against staging and make sure failure states are explicit. If useful, I can start with a short implementation map covering impacted modules, regression risk areas, and test scope. Thanks, Hercules
$500 USD in 7 days
7.4
7.4

Hi, I have 9+ years of Android and mobile development experience and can add the new feature to your existing Kotlin/Java codebase without disrupting the current app. I’m comfortable working with MVVM, Jetpack components, APIs, Room/Firebase if needed, Retrofit/OkHttp, Coroutines, ViewModel, LiveData/Flow, and Google Play release builds. My approach would be to first review the current architecture and API documentation, then implement the feature in the same style, update the UI, test key flows, fix regressions, and prepare a signed APK/AAB with a short changelog. Estimated timeline: 3-7 days after reviewing the repo, depending on feature complexity. Thank you.
$250 USD in 5 days
7.3
7.3

Hello, I am very interested in the Android App Feature Implementation project. I understand that you need a new feature added to your existing Android mobile application, including designing, coding, testing, and integration while maintaining the app's current functionality. With expertise in Mobile App Development, Android, Java, Kotlin, Android SDK, API Integration, and Software Architecture, I am confident in delivering clean, well-commented code that aligns with the MVVM architecture and provides a seamless UI integration. I plan to use relevant libraries and tools for efficient development and testing once I have access to the repository. You can review my portfolio here: - MY WORK STATS: ✨ https://www.freelancer.com/u/XanvraTECH I suggest a follow-up discussion to further detail the project requirements and timelines. Best regards, Warda Haider
$250 USD in 4 days
6.9
6.9

Hi, ★★★ Kotlin / Java Expert ★★★ 4+ Years of Experience ★★★ I can help you add the new feature to your Android app. I'll start by reviewing the existing codebase and the API documentation you provide. Then, I'll design and implement the new functionality while ensuring it integrates smoothly with the current UI. I'll use MVVM architecture and Jetpack components as specified. Testing will be thorough, including both unit tests and instrumentation tests, to ensure everything works perfectly before the update goes live. I'll also provide a change-log and deliver a signed AAB or APK ready for release. The bid is preliminary and can be finalized after clarifying a few details to ensure we're fully aligned on the project. Could you please confirm: 1. What specific feature do you want to add? 2. Are there any specific libraries or tools you prefer? 3. Will there be any additional requirements for the UI tweaks? Ready to get started!
$250 USD in 5 days
7.3
7.3

Hi, I have experience working with **Kotlin, Java, MVVM, Jetpack Components, Retrofit, Room, Coroutines, LiveData/StateFlow, and Firebase**, enabling me to integrate new features cleanly into existing codebases. ### My approach: * Review your existing codebase and API documentation * Implement the feature following your MVVM architecture * Maintain consistent UI/UX with your current design * Write clean, well-documented, and maintainable code * Perform unit and instrumentation testing to prevent regressions * Deliver an updated APK/AAB along with a changelog and deployment-ready build For development, I typically use Android Studio, Git, Retrofit, Jetpack libraries, JUnit, Espresso, and Firebase Crashlytics (if applicable). Once I review the repository and feature scope, I can provide an accurate estimate, but most feature integrations with testing are completed within **2–5 days**. I'm available to start immediately and look forward to reviewing your repository and discussing the implementation details. Best Regards, **Bhargav** Android Developer | Kotlin | Java | MVVM | Jetpack
$500 USD in 7 days
7.0
7.0

I can assist in enhancing your Android app by seamlessly integrating the new feature while maintaining the app's overall functionality. With expertise in Kotlin/Java and MVVM architecture, I ensure clean, well-commented code that aligns with your existing setup. Understanding the importance of UI consistency, I will ensure a smooth integration that complements your app’s current design. Thorough testing, including unit and instrumentation tests, will be conducted to prevent any regressions before deployment. My skills in change-logging and preparing signed AABs or APKs align with your requirements. By prioritizing transparency, responsiveness, and quality deliverables, I guarantee a solution that not only meets your immediate needs but also adds long-term value post-launch. Looking forward to discussing the tools and libraries to be used and estimating the integration and testing timeline once I have access to the repo.
$400 USD in 7 days
6.8
6.8

As an adept and seasoned Mobile Phone Developer with strong technical skills in Android and Java, I am confident in my ability to not only implement the feature you require but also thrive by sustainably integrating it within your existing codebase. Over the years, I have developed a deep understanding of architectural patterns such as MVVM with Jetpack components; this makes me proficient at crafting clean, well-commented code that seamlessly aligns with your architecture. Moreover, my thoroughness in unit and instrumentation testing will ensure a smooth process free from regressions before the app heads to Google Play. In terms of design, I believe a consistent user experience is paramount- I strive for a UI integration that harmoniously blends with the existing aesthetics while incorporating any necessary layout tweaks for optimal functionality. Rest assured, with my attention to detail, your change-log will be updated succinctly to keep you abreast of relevant progress.
$400 USD in 4 days
6.5
6.5

Hello, I understand that you are looking to implement a new feature into your existing Android mobile application using Kotlin/Java. I have extensive experience in Mobile App Development, particularly in Android and Kotlin, and have a strong understanding of MVVM architecture with Jetpack components. I will ensure the new feature is seamlessly integrated into your app's current design and functionality, with clean and well-commented code. Thorough testing will be conducted to prevent any regressions before the update is pushed to Google Play. I will maintain effective communication throughout the project and provide regular updates. You can view my portfolio here: https://www.freelancer.com/u/Curveballsol Best regards, Curveball Solutions
$250 USD in 2 days
6.3
6.3

Hi, there. I have carefully reviewed the requirements for Android App Feature Implementation. Based on your goals, you are looking for a mobile experience that is not just functional, but seamless and responsive for your users. My team and I specialize in mobile app engineering with a focus on high-performance architecture. We have a proven track record of helping businesses in Colombia build mobile solutions that scale effectively across both iOS and Android. Whether we are leveraging Software Architecture, Android, Android App Development, Mobile App Development for a native build or a cross-platform solution, our focus is on ensuring the interface is intuitive and the backend data handling is secure. We treat every app we build as a long-term asset. We avoid common pitfalls in mobile development such as memory leaks or poor UI responsiveness, ensuring your users have a smooth experience from their very first interaction. To help me provide a precise timeline for your development, I have one quick question: Are you aiming to launch on both platforms simultaneously, or are you prioritizing one (iOS or Android) for your initial market validation? Knowing this helps me determine the most efficient architectural path for your project. I am available for a discovery call to discuss your mobile roadmap whenever you are ready. Best regards Kausar and the Team
$350 USD in 3 days
6.9
6.9

Hi, I can add the new feature into your existing Android app while keeping the current MVVM structure, UI flow, and release build stable. I’ll review the repo first, connect the feature through the right ViewModel, repository, API, and UI layer, then test it against your staging backend. I’ll keep the implementation aligned with the current code style and prepare the signed AAB or APK with a short changelog once testing is done. Questions: 1. Can you share a short description of the new feature before repo access? 2. Does the feature require new API endpoints, or are the backend APIs already ready? 3. Is the app currently using XML layouts, Jetpack Compose, or both? I am a full stack mobile developer with 5+ years of experience building and maintaining production Android apps, including MVVM codebases, Jetpack components, API integrations, feature development, testing, bug fixes, and Google Play release builds. I’d love to hear back regarding this Android feature. Regards, Hassan
$500 USD in 3 days
6.6
6.6

Hi — I work daily in Kotlin/Java with MVVM + Jetpack, so I can drop a new feature cleanly into your existing architecture without disturbing the rest of the app. Once you share the source and API docs I will design, code and integrate the feature to match your current look and feel, add the minor layout tweaks needed, and cover it with unit + instrumentation tests so there are no regressions before you push to Play. You will get a short change summary and a clean merge-ready branch. We ship production Android apps regularly. — Muhammad Idrees / Global IT Vision Pvt. Ltd
$600 USD in 12 days
7.2
7.2

Dear client, I can implement new features in to your existing app code, I can implement with less time and with smooth functioning bug free code. I have more than 9 years of exp in apps and web development.
$250 USD in 5 days
6.2
6.2

Hello There!!! ★★★★ ( Seamless feature integration in existing MVVM Android app with clean testing ) ★★★★ Project understanding: Client needs a new feature added to existing Kotlin/Java Android application while keeping current MVVM structure intact. The integration must include API connection, UI consistency, and full testing to avoid breaking any existing features. Services: ⚜ MVVM feature integration in Kotlin/Java ⚜ API integration & backend sync ⚜ Jetpack components UI matching ⚜ Unit & instrumentation testing ⚜ Bug fixing & regression safety ⚜ Signed APK/AAB build release ⚜ Code cleanup & proper documentation I have exp in Android dev working on similar apps using Retrofit, Room, Jetpack, JUnit. I will carefully review existing repo, design feature flow, implement step by step and test on staging backend for stability. Tools I use are Kotlin, MVVM, Android SDK. lets connect for quick start and discuss details? Warm Regards, Farhin B.
$256 USD in 10 days
6.6
6.6

Hello, I hope you're doing well. I have a clear understanding of your project requirements for implementing a new feature into your existing Android mobile application. My expertise in Android App Development, Java, Kotlin, and Software Architecture align perfectly with the task at hand. My approach involves structured requirement confirmation, controlled planning, clean implementation, rigorous testing, and milestone-based transparency to ensure a seamless integration of the new feature into your app. With a strong emphasis on reliability and long-term results, I am confident in delivering the desired outcome. You can review my previous work in my portfolio: ⭐⭐ https://www.freelancer.com/u/CodeAnchors ⭐⭐ Could you please share more details about your top priority or key business goal for this feature implementation? I would love to discuss this further in an open chat to finalize the scope smoothly. Best regards, Muhammad Anas Khan
$250 USD in 4 days
5.8
5.8

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