Fix React Native Google Sign-In for Android and IOS

@DeveloperStation

Hi, I’ve worked extensively with Google Sign-In for both Android and iOS in React Native, and I understand the nuances of SHA-1/SH-256 keys and webClientId configurations. I’ve also integrated Firebase and Google APIs with custom backend solutions, so I’m well-versed in the entire authentication flow. In your case, the issue could stem from multiple areas, such as the webClientId, SHA-1/SH-256 keys, or even the Google Play Console release key. I’ll conduct a thorough audit of all these components to identify the root cause and implement a robust solution. Let’s schedule a 10-minute introductory call to discuss your project in more detail and ensure I fully understand your requirements. I’m eager to learn more about your exciting project. Best regards, Adil

@SBITServices

Hi, I have 5+ years of experience in React Native. I will design and develop a fully functional React Native mobile application for your business. The app will be cross-platform, responsive, and optimized for both Android and iOS. I will ensure smooth navigation, clean UI, and reliable performance. My Skills Include: a) React Native Development – Expertise in building cross-platform mobile apps with responsive UI. b) State Management – Experienced in Redux, Context API, and Zustand for scalable applications. c) Backend Integration – Skilled in connecting apps with REST APIs, Firebase, and third-party services. d) Database Handling – Proficient in Firebase Firestore, MySQL, SQLite, and local storage. e) Deployment & Support – Experienced with publishing apps on Google Play Store and Apple App Store. Please share your ideas or reference apps, and I’ll help bring your vision to life Lets connect in chat so that We discuss further. With Regards, Sai

@asimaarbi

I can fix the Android DEVELOPER_ERROR (SHA-1/SHA-256 / webClientId mismatch) and ensure Google Sign-In works properly on both Android and iOS. I’ll audit your Firebase, Play App Signing keys, OAuth clients, and react-native-google-signin configuration, correct any mismatches, and deliver a clean working AAB/APK. I’ll also explain the root cause and show you how to prevent this issue in the future.

@s9iper1

Hello, I can fix the React Native Google Sign-In issue in your app so authentication works reliably across all supported devices. I have strong experience with React Native auth flows, OAuth/Google Sign-In integration, and debugging native module problems. I’ll ensure smooth Google login, resolve underlying errors, and deliver a tested fix quickly. Ready to start as soon as you share the repo.

@arbu1499

Hello, I can audit your Firebase project, Play Console keys, and local keystores to identify exactly why Android Google Sign-In is failing while iOS works. I’ll ensure all SHA-1/SHA-256 fingerprints match, update the OAuth clients, verify the webClientId in code, and patch react-native-google-signin so you get a working AAB and APK on internal testing. Since you’re an engineer, I’ll also walk you through the exact steps to prevent this issue in the future. Looking forward for your positive response in the chatbox. Best Regards, Arbaz M

@GameOfWords

Fix React Native Google Sign-In for Android and IOS I’m a full-stack software engineer with expertise in React, Node.js, Python, and cloud architectures, delivering scalable web and mobile applications that are secure, performant, and visually refined. I also specialize in AI integrations, chatbots, and workflow automations using OpenAI, LangChain, Pinecone, n8n, and Zapier, helping businesses build intelligent, future-ready solutions. I focus on creating clean, maintainable code that bridges backend logic with elegant frontend experiences. I’d love to help bring your project to life with a solution that works beautifully and thinks smartly. To review my samples and achievements, please visit:https://www.freelancer.com/u/GameOfWords Let’s bring your vision to life—connect with me today, and I’ll deliver a solution that works flawlessly and exceeds expectations.

@sivakumar676

─── ⚡⭐⋆☆⋆⭐⚡ ─── Hi, there I am a React Native engineer who debugs Google Sign In on Android and iOS and ships clean AAB and APK fast. I read the full scope and this job really is to align Play signing certificates Firebase OAuth clients and in app webClientId so the account picker returns tokens without errors. You are going to get working sign in on Android again and keep iOS working with the same Firebase project. I'll keep it simple by tracing the exact certificate chain used in internal testing then updating OAuth clients config and app code to match. I'll verify the Play app signing certificate, compare it to Firebase Android OAuth fingerprints, and confirm the correct webClientId usage in the app. I'll update Gradle and Google services config, retest on a real internal track install, and deliver a build that signs in clean with no console warnings. I'll also write a short checklist so you can fix this fast after any key rotation or package change. March 4, 2026. Best, Siva

@shakeebsun

Hello, I’ve fixed multiple React Native DEVELOPER_ERROR (SHA / webClientId mismatch) issues and can quickly audit your Firebase, Play App Signing keys, OAuth clients, and react-native-google-signin setup. I’ll correct any SHA-1/SHA-256 or OAuth misconfigurations, verify gradle settings, and deliver a clean AAB/APK with working Google Sign-In on Android (and reconfirm iOS). Since you’re an engineer, I’ll clearly explain the root cause and show you how to prevent this in future releases.

@haseebsidd07

Hi there, I understand you're facing a "DEVELOPER_ERROR" issue with your React Native app's Android build regarding Google Sign-In functionality. This problem, especially when both iOS and previous Android builds worked well, often points to possible mismatches in SHA-1/SHA-256 credentials or configurations. My name is Abdul Haseeb Siddiqui, and I have over 6 years of experience in Mobile App Development, specializing in React Native, Android, and Firebase integrations. I’m well-equipped to audit your Firebase project and Play Console release keys, resolve the configuration issues, and ensure both Google Sign-In functionalities work seamlessly. Portfolio links: https://www.freelancer.com/u/haseebsidd07 I would be happy to assist you in not only resolving this issue but also equipping you with knowledge to handle similar situations in the future. Thank you for considering my proposal. Regards, Abdul Haseeb Siddiqui

@sharjeelrb

Hi! I can fix your React Native Google Sign-In issue quickly and reliably. I’ll diagnose the sign-in flow, patch any config/auth bugs, and test on both Android and iOS to ensure users can log in smoothly with their Google accounts. I’m familiar with the required SDKs and OAuth setup, and I’ll deliver a working build you can deploy. Ready to start now.

@sf264

Hello, I have understood the error that you are facing and it will be fixed quickly. I have fixed similar errors in the past with great success. Please contact me to discuss more details. Looking forward to working with you, Fahad.

@Aliraza2727

As a senior developer with 7 years of experience in WordPress, Shopify, React, Laravel, HTML, CSS, Bootstrap, JavaScript, jQuery, Ajax, PHP, SEO and graphic design, I'm excited to help bring your project to life. Let's begin with a conversation. I have read through your requirements, and I'm confident that I’m the perfect fit for this task. My goal is to deliver work that exceeds your expectations. We can finalize the price after our discussion to ensure it aligns with your needs. Let's get started!

@thomasb726

Hi there, Resolving the ?????????_????? in your React Native app's Android build is crucial for a seamless user experience, particularly after a period of normal functionality. Your proactive steps in updating the SHA-1/SHA-256 fingerprints and webClientId in Firebase are commendable, and it's clear that you're well-versed in the technical aspects, making collaboration more effective. The core challenge here seems to revolve around ensuring that the Play-signed keys align perfectly with your Firebase credentials and the settings in react-native-google-signin. This mismatch is a common pitfall that can lead to the issues you're facing. To diagnose effectively, I would start by auditing the Firebase project and the Play Console release keys to ensure all configurations are consistent and properly set. In previous projects, I’ve dealt with similar authentication issues in mobile applications, where I successfully resolved conflicts between Google Sign-In credentials and local keystores. For instance, I helped a team fix their Google authentication flow across both Android and iOS platforms, resulting in a 30% increase in successful sign-ins after addressing key mismatches and updating the configuration settings. My approach often includes a thorough review of the OAuth client settings, ensuring all entries are correct, followed by testing builds in a controlled environment. This experience aligns closely with your requirements, and I’m confident I can help you achieve a successful implementation. To tackle this project, I would follow these steps: - Conduct an audit of your Firebase project and Play Console release keys to identify any discrepancies. - Verify and correct the SHA-1/SHA-256 entries and OAuth client settings as necessary. - Ensure the webClientId in your code is valid and corresponds with the updated settings. - Update the react-native-google-signin setup to ensure compatibility with the latest versions of React Native and Firebase. - Deliver a clean build (AAB + APK) that successfully signs in on an internal-test track device. - Provide guidance and documentation to help you understand and troubleshoot similar issues in the future. Could we discuss the following to ensure alignment? - What specific tools or methods do you prefer for auditing the Firebase and Play Console settings? - Are there any particular areas of the setup you’d like me to focus on more closely? - How comfortable are you with the documentation and troubleshooting process for future reference? Sincerely,

@Hubready

Hello! I am a US-based senior software engineer with extensive experience in mobile app development, including React Native. I carefully read your project description regarding the Google Sign-In issue and understand the urgency behind resolving the “DEVELOPER_ERROR” for both Android and iOS. With over 15 years in the field, I possess a solid grasp of debugging, OAuth, and Firebase integration, which are crucial for addressing this challenge. My approach will include a thorough examination of your app’s configuration, checking OAuth credentials, and validating the setup in the Google Developer Console to pinpoint the issue effectively. Could you please clarify the following questions to help me better understand the project? 1. Have you recently made any changes to your app’s configuration or dependencies that might have triggered this error? 2. Are there any specific versions of React Native or dependencies you are currently using that I should be aware of? I believe that with clear communication and structured milestones, we can resolve this issue swiftly and ensure your app functions seamlessly. I am serious about delivering the perfect result and am ready to dive in right away. Looking forward to your response! Best, James Zappi

@denisSolution

Hello, I have 5 years of experience as a freelancer specializing in App Development, React Native, Debugging, Mobile App Development, Google Firebase, iPhone, Android and OAuth. i build high-performance, cross-platform mobile apps with clean code, smooth UI, and real-time functionality using REST and WebSocket. my work includes custom UI, animations, and seamless api integration. I focus on fast delivery, scalable code, and long-term support with client satisfaction as my top priority. i’m confident i can deliver a reliable, polished app that works flawlessly on both ios and android. I know what the difference between 99% and 100% is. I promise the perfect result. If you hire me, I will do my best until you are fully satisfied. Let’s discuss your project details to get started! Thanks, Denis

@jonhw5

Hello, thanks for posting this project. I understand your requirements to audit, correct, and update the necessary configurations for successful Google sign-in on both Android and iOS platforms. I have experience in resolving similar authentication issues and ensuring seamless integration with Firebase and Google services. I can assist you in identifying and resolving any misconfigurations, updating necessary settings, and delivering a clean build that signs in successfully on Android and iOS devices. Additionally, I can provide guidance on resolving such errors in the future to empower you with the knowledge to troubleshoot independently. Looking forward to collaborating with you on this project. Would you like me to provide detailed documentation outlining the steps taken to resolve the Google sign-in issue for future reference?

@stanislavm37

Hey, this sounds like a great project to be part of. 5+ years of experience in Mobile App Development, React Native, Android, Google Firebase makes me the ideal candidate for this project. I understand your requirement to fix the Google Sign-In issue on your React Native app for Android and iOS. I will audit your Firebase project, Play Console release keys, and local keystores to correct any mismatched entries and adjust the necessary configurations. I will ensure that the react-native-google-signin setup is patched or updated accordingly and provide you with a clean build that successfully signs in to Google on Android devices. I'd love to learn more about your vision and connect to explore how we can propel your project forward. Best, ~Stanislav

@matthewc382

Hello, With years of experience and proven skills in Mobile Development, specifically with React Native, I believe I am not just a good fit for your project, but the best option you have. My ability to integrate complex systems seamlessly, like Google Firebase, is one of my strong suits that will come in handy in resolving the authentication error you're experiencing on your Android build. My thorough understanding of both Android and iOS allows me to efficiently compare and identify issues unique to each platform and provide accurate solutions. Drawing from my comprehensive knowledge of Google Firebase, I would perform intensive analysis of your Firebase project alongside the Play Console release keys and local keystores. This would involve correcting any mis-matched SHA-1/SHA-256 entries or OAuth client settings in addition to making necessary adjustments to the google-services.json. I pride myself on my senior-level architecture mindset which ensures I build applications with long-term maintainability in mind. Furthermore, I will take the time to provide clear explanations so that you can master this issue yourself should it occur again in the future. Your satisfaction is my priority and I look forward to delivering a fully functional build (AAB + APK) that signs into Google successfully on an internal-test track device. Let's start building right! Thanks!

@fakhara1ha

Hey , I just finished reading the job description and I see you are looking for someone experienced in Mobile App Development, App Development, OAuth, Android, React Native, Debugging, Google Firebase and iPhone. This is something I can do. Please review my profile to confirm that I have great experience working with these tech stacks. While I have few questions: 1. These are all the requirements? If not, Please share more detailed requirements. 2. Do you currently have anything done for the job or it has to be done from scratch? 3. What is the timeline to get this done? Why Choose Me? 1. I have done more than 250 major projects. 2. I have not received a single bad feedback since the last 5-6 years. 3. You will find 5 star feedback on the last 100+ major projects which shows my clients are happy with my work. Timings: 9am - 9pm Eastern Time (I work as a full time freelancer) I will share with you my recent work in the private chat due to privacy concerns! Please start the chat to discuss it further.