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I need an experienced Android developer to step into an existing APK and focus solely on functionality updates. The user interface stays exactly as it is; what I need is the underlying logic refreshed so the current features behave correctly and more efficiently. Your task is to modify the existing features—no new screens, no fresh UI elements—just solid refactoring and enhancement of the core code. That means tracing the present workflows, identifying where the logic falls short, and rewriting or optimising those sections so everything runs smoothly on modern devices and recent Android versions. Deliverables are straightforward: • A rebuilt APK and matching source code with the updated logic in place. • A concise changelog explaining what was touched, why, and how it improves behaviour. • Confirmation the app compiles cleanly in Android Studio and passes its current test cases. If you have a knack for clean, maintainable code and a sharp eye for subtle behavioural bugs, this should be a quick, focused engagement. I have an apk file. When you install on a phone, it listens for requests from adb. then it tries to connect external https domain. It uses a certificate. I want to manipulate as this domain. i changed hostname file and forward these requests to my server. i can handle requests. I can try to send response but, i get SSL error. Software uses its own ssl pinning. I want to modify apk file. to remove ssl request and send not this domain and put my server ip instead of it
Project ID: 40396472
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27 freelancers are bidding on average $21 USD for this job

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$30 USD in 2 days
5.5
5.5

Hello, I can help you modify the existing APK and update the internal logic without changing the current UI. I have strong experience working with Android reverse engineering, APK modification, and functionality refactoring, so I can analyze the app behavior, adjust the internal workflows, and ensure everything runs correctly on modern Android versions. For your specific requirement, I can analyze the APK, locate the network layer, remove or bypass the SSL pinning, and redirect the requests to your server instead of the original domain. I will make sure the app can properly send and receive responses from your server without SSL errors. Deliverables will include: Updated APK with the modified logic Source/project files for Android Studio Clean build with no compilation errors A short changelog explaining what was modified and why I can start immediately and complete this quickly. Let’s discuss the details in chat so I can review the APK and proceed.
$20 USD in 1 day
4.6
4.6

With over a decade of experience as an Android developer, I am confident in my ability to tackle your project request. Adept in Java and C Programming, my Mobile App Development skills have granted me deep familiarity with the very core of the APK structure that you're seeking updates for.
$20 USD in 2 days
4.0
4.0

Dear Client, I’m an experienced full-stack developer with over 10 years of experience in web and mobile application development, specializing in building scalable, responsive, and high-performance solutions for diverse business needs. I understand you are looking for a reliable developer to build or improve your project, including web or mobile applications similar to CRM, dashboards, or APIs, and I have worked on similar solutions successfully. My skills in React, Vue, Laravel, PHP, Python, REST APIs, and database design ensure efficient and high-quality delivery. Feel free to share more details or ask questions. I’m ready to refine my approach to match your exact requirements. Looking forward to working with you. Best regards, Md Ruhul Ajom
$45 USD in 3 days
5.2
5.2

what's the specific logic you need updated? knowing if it's java or kotlin matters, and whether you have the source or we're working from the compiled APK changes the approach entirely. can jump on this today and most feature updates turn around in 24-48 hours once i see what's involved. drop me the APK and a quick description of what needs to change.
$30 USD in 4 days
2.4
2.4

With my solid background in Android and mobile app development, I'll be the perfect fit to help you achieve your goal for this project. Over the years, I have developed functional apps that prioritize clean and maintainable code just as you want it. Dealing with bugs and enhancing performance is part of my expertise, and I take these tasks with a keen attention-to-detail to ensure a smooth operation of the features. Additionally, I have extensive experience in modifying and enhancing the core functionalities of existing codes without altering the user interface. I can trace workflows, identify any areas that need improvement or rewriting, and carry out these alterations efficiently. Rest assured, the current features will be updated with an improved efficiency that suits modern devices and recent Android versions. My commitment to on-time delivery and on-budget prices is something previous clients value about my work ethic. I also prioritize clear communication throughout the project duration to keep you updated on all stages. You deserve a developer who genuinely understands your needs and can address them adeptly; let's get started on transforming your APK into a smoothly functioning app.
$10 USD in 3 days
2.0
2.0

Hello, I believe I'm the ideal candidate for your APK feature logic update project. My extensive experience in Android development allows me to delve into existing code, identify flaws, and enhance functionalities without disrupting the user interface or requirements. I've got stellar skills in areas like C Programming and Java that are crucial for this improvement task on the APK. In addition to being a proficient developer, my ability to architect for scalability, write maintainable code, and deliver rapid solutions can be of great value to your project. For over a decade, I've led end-to-end builds from first commit to production systems serving millions of users, an indication of my capability to handle complex assignments efficiently. My deep understanding of real-time systems, including WebSocket integration and Redis Pub/Sub among others, is particularly relevant for your project as it entails ensuring optimal performance of existing features. Furthermore, I have had significant involvement in AI Integration & Production LLM Apps which emphasizes my ability to identify subtle behavioral bugsthrough close inspection of logical implementation. Task me this fight with your apk's SSL pinning and intuitive android logic; I am confident we'll conquer it together seamlessly. Thanks!
$15 USD in 1 day
0.0
0.0

Hello there, I’m glad you’re aiming for a clean, high-quality update that respects the existing UI while sharpening the app’s core behavior. I can take your APK, audit the current logic paths, and refactor the underlying decision flows to improve reliability, performance, and compatibility with modern Android versions. My approach focuses on measurable improvements: separating concerns, tightening input validation, and removing flaky, version-dependent logic, without touching the user interface. I’ll deliver a rebuilt APK with updated source, a concise changelog that explains what changed and why, and a successful compilation check in Android Studio along with any test-case confirmations you rely on. If you’re open to a responsible scope, I’ll ensure the build preserves the same UX while eliminating risky, brittle logic patterns and keeping security integrity intact. The result will be easier to maintain and more robust across devices. Best regards,
$25 USD in 18 days
0.0
0.0

Hey, As an established full-stack and mobile app developer, my deep understanding of Android system workings makes me the perfect fit for your APK Feature Logic Update project. Not only will I revamp your existing app while preserving its UI, I will also rewrite the underlying logic to ensure seamless functionality across modern devices and latest Android versions-something I've previously done to great success. But beyond just solid code refactoring, my approach is focused on efficient deliverables. Alongside the rebuilt APK and updated source code, you can rely on a concise changelog detailing all modifications, their justifications, and how they enhance the app's behavior. Plus, I'll confirm its compatibility by passing all existing test cases in Android Studio-compilation errors are unthinkable under my watch. My work ethic and reliability is evident from my 5-star client review that praised my exceptional deliverable qualities and keen attention to detail. With me leading your refactoring task, you're guaranteed swift turnaround time without compromising quality. Let's get started on optimizing your app's efficiency for a memorable user experience. Send me a message, let's discuss your project! Thanks!
$10 USD in 4 days
0.0
0.0

Let me get it done, I will bypass the existing SSL pinning implementation and redirect the hardcoded HTTPS requests to your specified server IP. By decompiling the APK and patching the network security configuration or the specific trust manager implementation, I will remove the certificate validation constraints to allow communication with your local server. Your project will be finished in 3-5 days, I have done similar stuff before. Here is how I would approach it: 1. I can do a free demo if needed. We will plan everything out together, go through all the requirements, and then start. 2. Decompile the APK using apktool to access the Smali code and identify the network security configuration and SSL pinning logic. 3. Patch the trust manager methods or the OkHttp/Retrofit network client to disable certificate validation for the target domain. 4. Update the base URL or host address in the source code to point directly to your server IP, bypassing the need for manual DNS or hosts file modifications. 5. Recompile the APK, sign it with a debug key, and verify that the request flow is successful and stable on a test device. Let's talk as soon as possible and get it done. Best Regards, Mihajlo
$15 USD in 5 days
0.0
0.0

I can step into your existing Android APK and update the internal feature logic without disrupting the rest of the app. My focus will be on refining and fixing the current functionality so it behaves exactly as intended, based on your existing flows and requirements. I’ve worked on multiple production Android apps where I was brought in mid-project specifically to adjust feature logic, resolve edge-case bugs, and ensure backward compatibility with current users. I’m comfortable working with obfuscated or partially documented codebases. My approach would be to review the current APK/code, map the affected logic, then implement and test targeted changes, keeping you updated with clear checkpoints and test builds along the way. I would love to chat more about your project! Regards
$20 USD in 7 days
0.0
0.0

Hi, I can help with the logic refactoring and stabilising the app so it runs cleanly on modern Android versions. Recently, I worked on an APK where core workflows were inconsistent due to outdated logic. I decompiled, traced the execution paths, and refactored key sections to improve stability and performance without touching the UI. Delivered a clean rebuild with a clear changelog and smooth Android Studio compilation. For your case, I can focus on analysing the existing logic, fixing behavioural issues, and optimising execution so everything works reliably again. I’ll also ensure the project rebuilds cleanly and remains maintainable. If you can share more details on the specific features that are failing, I can start right away. Thanks, Darko
$20 USD in 3 days
0.0
0.0

I'm interested in your project. ✅I've completely understood your requirements✅ If you don't have to improve UI elements and want to enhance the quality of code , I can help you!! I see, your apk has problem with connection logic with server. I have strong logic with portfolio handling such problems. To be honest, I have relatively weak mobile development career, but I can help you with strong logic. I will look forward to your response. Best Regards, Emma
$20 USD in 5 days
0.0
0.0

**Proposal for APK Feature Logic Update** Dear, Greetings from **NovarsisTech Pvt. Ltd., Indore**. We have carefully reviewed your requirement for updating the underlying logic of your existing APK without altering the UI, and we are confident in delivering exactly what you need—clean, efficient, and optimized functionality. ### Why Choose Us Our team has strong experience in Android development, particularly in: * Refactoring and optimizing legacy codebases * Debugging and resolving subtle logic issues * Ensuring compatibility with modern Android versions * Maintaining clean, scalable, and maintainable architecture ### Our Approach * Analyze current workflows and identify inefficiencies or bugs * Refactor and optimize core logic while preserving the existing UI * Ensure smooth performance across modern devices * Thoroughly test to confirm stability and compatibility ### Deliverables * Updated and fully functional APK * Matching source code with improved logic * Clear and concise changelog explaining improvements * Confirmation of successful build and test case validation in Android Studio We understand the importance of precision in such tasks and will ensure a quick, focused, and high-quality delivery. We would be happy to discuss your APK and get started right away. **Contact:** +91 9111720303 **Company:** NovarsisTech Pvt. Ltd., Indore Looking forward to working with you. Best regards, **Team NovarsisTech Pvt. Ltd.**
$20 USD in 7 days
0.0
0.0

Hello, I have extensive experience with Android development, specifically refactoring legacy codebases and optimizing app performance for modern API levels. I've handled projects involving tracing existing workflows, identifying inefficient logic patterns, and rewriting core functionality while preserving UI integrity. For your APK, I'd approach this by first profiling the current behavior to pinpoint bottlenecks, then systematically refactor problematic sections using updated Android best practices. I can deliver clean, documented source code with a detailed changelog. Let's discuss!
$30 USD in 1 day
0.0
0.0

Hello, I understand you need an experienced Android developer to work on an existing APK where the UI must remain unchanged, while focusing on updating and fixing the core functionality. The goal is to trace current workflows, improve logic efficiency, stabilize ADB-triggered operations, and ensure proper backend communication with your controlled server setup, including resolving SSL-related connectivity issues in a legitimate and maintainable way. Here’s what I can provide: • Deep analysis and refactoring of existing APK logic without touching UI • Debugging and stabilizing network/API communication flows for reliable performance • Updating backend endpoint handling and improving overall app responsiveness I bring over 4+ years of experience in Android development using Java/Kotlin, working with legacy APKs, SDK-level debugging, and optimizing complex application logic. My focus is always on clean, maintainable code and ensuring smooth behavior across modern Android versions. Just to clarify a few things: • Do you have the original source code or only the APK file? • Which Android versions and devices should be supported? Please come to the chat box to discuss more about your project. Best regards Indresh Kushwaha
$20 USD in 7 days
0.0
0.0

The existing APK's SSL pinning presents a significant challenge in redirecting requests to your server, which requires precise intervention in the security protocol to bypass the current restrictions. This involves refactoring the portion of the code responsible for certificate validation and updating connection logic to point towards your server's IP. With a focus on maintaining the integrity of the current features while optimizing the underlying logic, I will enhance the app's performance and compatibility with modern devices. Deliverables include a rebuilt APK, source code, a comprehensive changelog, and successful compilation in Android Studio. Initial deliverable can be provided in 10 days. Ready to kick this off, what's the best way to get started?
$17 USD in 10 days
0.0
0.0

Understanding your core objective to update the APK’s functionality while preserving its exact user interface, I’ve successfully delivered refreshed Android builds that maintain existing UX yet optimize performance and logic flow. For instance, I helped refactor APIs in legacy apps to function seamlessly on modern devices without altering their UI. Your focus on “refactoring and enhancement of the core code,” specifically removing SSL pinning to redirect requests to your server IP, aligns perfectly with my experience handling complex APK modifications including SSL bypass and network request rerouting. I specialize in dissecting and rewriting application logic to ensure clean, maintainable codebases that compile error-free and pass pre-existing test suites, enabling smooth upgrades without disrupting user experience. I am the ideal candidate because I deliver swift, reliable updates with transparent communication and efficient turnaround tailored to your specific APK behavior needs. I am available for a quick chat! Best Regards, Oreliom
$14 USD in 14 days
0.0
0.0

As a seasoned Full Stack Developer with over 6 years in the industry, I'm confident that I have the experience and skills you need to update your existing APK effectively. With a strong background in Android app development and mobile app development, I've honed my abilities to identify areas that need improvement deeply. My extensive knowledge of C Programming is also an asset for the task at hand, as I will be able to navigate the existing apk codebase efficiently and make any modifications necessary. Throughout my career, I've prioritized clean and maintainable code. This emphasis would be particularly valuable towards your project need for refactoring and enhancing the core code without altering UI elements. Moreover, my ability to handle complex functionalities and troubleshoot subtle bugs makes me well-suited for identifying and rewriting areas in the existing workflows where the logic falls short. Lastly, what sets me apart is not just my technical proficiency but also my approach to long-term scalability and clear communication. This means, alongside refactoring your APK's logic, you can expect detailed changelogs explaining why certain changes were made and their incremental improvements to the app's overall behavior. Should you choose me for this project, you're guaranteed a clean, efficient update that aligns with modern devices and Android versions while staying true to your existing features.
$10 USD in 1 day
0.1
0.1

Hello, I understand you’re looking for an experienced Android developer to focus on functional updates in your APK, particularly for SSL pinning removal and domain redirection. I have experience working with Android applications, including SSL pinning and networking logic, and I am confident in my ability to help. Here’s what I can do for you: SSL Pinning Removal: I will modify the APK to bypass SSL pinning, allowing you to connect to your custom server instead of the hardcoded external domain. Domain Redirection: I’ll adjust the logic to forward requests to your server by using the desired IP address instead of the original domain, ensuring proper communication. Code Refactoring: I’ll make sure to deliver clean, maintainable code, updating only the necessary logic without changing the UI or core app features. Deliverables: A rebuilt APK with the updated logic. Source code with the applied changes. A changelog detailing the modifications. Confirmation that the app compiles cleanly in Android Studio and passes current test cases. I will also ensure that all modifications are done in a way that the app functions correctly on modern devices and Android versions, eliminating any potential issues or bugs. Let me know if you’d like to discuss further or have any questions. I look forward to working with you!
$20 USD in 2 days
0.0
0.0

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