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My Flutter app is virtually ready to ship, but users still can’t log in. The UI is finished and the backend endpoints are in place; the only blocker is a stubborn authentication bug that prevents valid credentials from opening a session. I need someone comfortable diving into a Dart codebase, reproducing the “user unable to log in” scenario, tracing the failure (whether it’s state management, token handling, or an API response), and delivering a solid fix that restores normal sign-in flow on both Android and iOS builds. Deliverables • Diagnose the root cause of the login failure • Patch the code and, if relevant, update any auth-related configuration • Supply a concise summary of changes so I can merge them confidently • Confirm the fix through a clean build and real-device test (emulator alone isn’t enough) If you’re quick with Flutter debugging and know your way around common auth stacks, this should be straightforward. I’m ready to hand over the repo as soon as you are.
Project ID: 39740833
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Hi, I have 4 years of experience with Flutter . Can we chat about the issue . I can get your issue resolved within few hours. Let us discuss Warm Regards Lokender
₹5,000 INR in 2 days
0.0
0.0
37 freelancers are bidding on average ₹7,654 INR for this job

Dear Abhijeet S., I'm writing regarding your project, 'Fix Flutter Login Bug'. I understand you're facing a critical authentication issue preventing users from logging in, despite the UI and backend being ready. This seems to be a common, yet frustrating, blocker for shipping a Flutter app. With extensive experience in Flutter development and debugging complex authentication flows, including state management, token handling, and API integration, I'm confident in quickly identifying and resolving such issues. My approach will involve diving into your Dart codebase, reproducing the bug on real devices (Android and iOS), meticulously tracing the failure point, and implementing a robust fix. I'll also provide a clear summary of changes for a confident merge. I'm ready to begin immediately and would love to discuss this further. Please let me know when you're available for a quick chat. Sincerely, Navneet
₹12,000 INR in 7 days
7.7
7.7

Hi there, I’ve reviewed your Flutter app requirements and would love to help. With 5+ years of experience in cross-platform development, I specialise in clean UI, smooth performance, and robust API integration. I’ll begin with clear planning, share regular progress updates, and ensure the app is fully tested before launch. Let’s connect to discuss your vision — I’m ready to get started! Best, Bhargav Flutter Developer | Android & iOS Expert
₹7,000 INR in 2 days
7.0
7.0

Hello, I'm excited to apply for your project With 5+ years of experience in developing high-performing mobile applications, done 50+ mobile application. Flutter developer with hands-on experience in creating interactive apps. Read your requirements and able to do your work. Let’s connect to discuss features, design flow, and timelines. Thanks & regards, Manish Giri
₹7,000 INR in 7 days
6.0
6.0

Subject: Full-Stack Developer to Deliver Your Project [Fix Flutter Login Bug] — Fast, Secure & SEO-Optimized Results Hi there, Thank you for outlining your project! I’d love the opportunity to bring it to life with precision, performance, and results you can count on. As a Full-Stack Web Developer with 7+ years of hands-on experience, I specialize in building modern, scalable, and conversion-optimized ecommerce websites across WordPress, WooCommerce, Shopify, Wix, Webflow, Laravel, PHP, React.js, Vue.js, and more. Here's how I’ll add value to your project: ✦ Fast, secure, and SEO-friendly development ✦ Clean, maintainable code built for long-term success ✦ Fully responsive design with modern UI/UX ✦ Hosting & domain setup: DNS, SSL, performance tuning ✦ Seamless API integrations, bug fixing, and ongoing support ✦ Transparent communication, on-time delivery, and post-launch care With 90+ 5-star reviews and a proven track record of delivering client success, I’m confident I can exceed your expectations. Portfolio & Reviews: https://www.freelancer.com/u/atifuiux Ready to start immediately — let’s chat and get your project moving! Best regards, Atif IS Full Stack Web Developer | UI/UX Specialist | Webflow Expert
₹4,000 INR in 1 day
5.6
5.6

Hi yes i am ready to fix your login issue in your flutter App so hit me up for chat thanks kindly hit me up for chat thanks
₹7,000 INR in 3 days
5.6
5.6

Hello, I am RajK, with over 15 years of experience in Mobile App Development and PHP. I have carefully reviewed your project requirements. To fix the Flutter login bug, I will thoroughly analyze the Dart codebase to identify the root cause of the authentication failure. I will then proceed to patch the code, update any relevant authentication configurations, and provide a detailed summary of the changes for your review. Finally, I will conduct a clean build and real-device testing to ensure the fix is successful on both Android and iOS platforms. Please feel free to initiate a chat to discuss further details and get started on resolving the login bug promptly. Thanks, RajK
₹5,000 INR in 7 days
5.6
5.6

As an experienced and top-rated full-stack developer with an impressive track record of successfully completing over 550 mobile app and web design projects, I can assure you that solving this Flutter login bug is well within my skillset. I have a solid 9+ years of experience." My strength lies in my ability to quickly understand and debug complex codebases, such as your Flutter app. I am proficient in Dart and well-versed in Android and iOS debugging processes. I understand that this bug can significantly impact user experience, and thus requires thorough issue tracing to guarantee a comprehensive resolution. Restoring normal sign-in flow on both platforms won't be a hassle for me. Furthermore, I excel in effective communication, which is crucial for this project collaboration. I will provide concise summaries of the issues identified, the changes made, and the fixes implemented so that you have all the necessary insights for a confident merge. Finally, I'm not just limited to fixing bugs, but also skilled enough to handle any additional Auth-related configuration updates if needed. So, let's collaborate to get your app ready for deployment by finally eliminating this stubborn bug!
₹7,000 INR in 7 days
5.6
5.6

Hi, I understand how frustrating it can be to have a nearly finished app blocked by a login issue. I’d be glad to jump in and help you debug and fix the authentication flow so your Flutter app can finally be shipped. With solid experience in Flutter/Dart development and fixing authentication bugs (JWT, OAuth, Firebase, custom APIs), I’ve handled similar issues before where valid credentials weren’t opening a session due to token handling, API responses, or state management misconfigurations. Here’s how I’ll approach it: Reproduce the Issue: Test the login flow directly on both Android & iOS builds. Debug & Diagnose: Identify whether the issue lies in state management, token handling, or backend communication. Implement Fix: Patch the code/configuration to restore proper session handling. Confirm Stability: Run a clean build and test on real devices (not just emulators). Summary Report: Provide a clear explanation of changes so you can merge confidently. I can start as soon as you share the repo and will aim for a fast turnaround since this is the final blocker before release. Have you already confirmed if the backend is returning a valid token/response, or should I begin debugging from both client and server sides? Looking forward to getting this resolved for you. Best regards, Ahsan
₹15,000 INR in 4 days
4.4
4.4

Hi there, Searching professional developer? I can Fix Flutter Login Bug as per your requirement. My development skills can give you a professional website including SEO content. I have 2+ years Experience in PHP Wordpress, PHP, HTML, CSS, Magento, Jquery, Android, iOS. I develop mobile friendly responsive website including SEO content so you can get all together. I will build site on time frame you need with fulfilling all requirement you share. I can do this assignment very efficiently. Kindly contact me in the chat box so I can share more samples with you. Regards Bharti
₹5,000 INR in 2 days
4.4
4.4

As an experienced software developer and Flutter expert, I can provide effective resolution to your persistent login issue. My comprehensive knowledge of Dart and Flutter will allow me to efficiently diagnose the root cause of the problem and determine if it lies in state management, token handling, or API response - areas I am well-versed in. Moreover, I am confident in my ability to patch the code, update authentication-related configurations as needed, and provide you with a comprehensive summary of the changes made for seamless merging. I also understand that true satisfaction comes from clean executions. To ensure this, I will not only build upon my experiences with emulators but will also rigorously test the fixes on real Android and iOS devices. This way, we are certain that your user login function is restored across all platforms. My specialization also extends to backend programming; facilitating communication between frontend segment and backend servers. So, if during the process we identify any other issues related to SQL databases or server-side PHP scripts,I can assist with those as well. By choosing me for this project you can be assured of intelligent solutions delivered efficiently within given timeframes, ultimately leading to a flawless app ready for launch!
₹7,000 INR in 7 days
3.6
3.6

Hi, I'm a skilled Flutter developer with extensive experience in creating high-quality mobile applications. I'm available to start quickly and excited about the opportunity to work on your project. Best, Khushal Chothani
₹5,000 INR in 7 days
3.6
3.6

With nearly a decade of experience in the IT industry and a vast portfolio of successful app development projects, I am confident that I am the expert you need to fix your Flutter login bug. Your project description highlighted the obstacles you're facing. Walking through your requisites, I quickly realized that I deal with similar challenges as a part of my typical projects on a daily basis. As evident in my previous projects like WheelDot, Family Pharmacy, and StockDaddy, I have an excellent track record of resolving complex issues and optimizing backend architectures. Moreover, my proficiency in Android, iOS, Dart, and Flutter with hands-on experience guarantees you an efficient solution. So when it comes to debugging Flutter apps and dealing with authentication bugs, consider it done! Keeping close collaboration in mind to build exactly what you envision, my unique approach involves integrating responsive UI/UX with scalable and optimized backend hierarchies. As you require detailed updates about changes post-resolution, I can assure you concise summaries that summarize all my work with clarity, leaving no communication gap. Finally, to uphold the reliability of my solution, I execute real-device tests rather than relying solely on emulators; returning to you only when I am 100% satisfied with the resolution
₹7,000 INR in 7 days
3.0
3.0

Hello, I understand the urgency of your issue — the app is ready but the login flow is blocking your launch. With 10+ years of mobile development experience (iOS native + Flutter), I specialize in debugging stubborn authentication problems like this. I can: Reproduce and trace the login failure in your Flutter codebase. Diagnose whether it’s state management, token handling, or API response causing the issue. Patch the code, adjust any auth configurations if needed, and provide a clear summary of changes. Verify the fix with a clean build on real devices for both Android & iOS. I’m confident I can resolve this quickly and get your sign-in flow working smoothly. Please share the repo and I’ll dive right in. Best regards, Sandeep Singla
₹6,000 INR in 2 days
0.6
0.6

“I don’t just fit this project—I can help it reach its full potential. I understand the urgency to resolve the authentication bug in your Flutter app that's hindering user logins. With expertise in Dart and Flutter debugging, I will quickly identify and fix the root cause, ensuring seamless login on Android and iOS builds. While I am new to freelancer, I have tons of experience and have done other projects off-site. I would love to chat more about your project! Regards, Saint Sambo"
₹6,250 INR in 14 days
0.2
0.2

"I am available immediately you only pay if you are happy. I will swiftly troubleshoot your Flutter app's login issue on Android and iOS. With a keen eye for detail, I'll root out the authentication bug causing the login failure. While new to freelancer, I've rectified similar issues offsite. I assure you satisfaction - if there are open items, no payment is necessary. I would love to chat more about your project! Regards, Jaundre Liebenberg"
₹5,000 INR in 10 days
0.0
0.0

Hello Abhijeet, I am Adeel, a skilled Flutter developer with a strong background in debugging and fixing authentication issues within Dart codebases. I have experience in diagnosing root causes of login failures, patching code efficiently, and ensuring seamless authentication flow on both Android and iOS platforms. I am confident in my ability to dive into your project, identify the authentication bug, and deliver a solid fix that restores normal sign-in functionality. I am well-versed in common auth stacks and can provide a concise summary of changes for easy integration into your app. Let's discuss further to ensure a successful collaboration. Best regards, M. Adeel
₹7,000 INR in 7 days
0.0
0.0

I can quickly debug and fix the authentication issue in your Flutter app by identifying the root cause (state management, token handling, or API response) and restoring a smooth login flow for both Android and iOS. I will provide a clean patch, a summary of changes, and confirm the fix through real-device testing within your specified timeline and budget. Thanks & Regards, Expert Solutions
₹12,000 INR in 5 days
0.0
0.0

Your Flutter app will have a fully functional, reliable login flow so users can sign in seamlessly on both Android and iOS. I am confident in quickly diagnosing and patching the root cause of the authentication issue—whether it lies in state management, token handling, or API responses—so your app is ready to ship without blockers. In past projects, I’ve debugged and fixed login failures in production-ready Flutter apps by tracing API calls, resolving token persistence issues, and aligning auth configurations across platforms. My approach includes thorough real-device testing, concise documentation of code changes, and clean builds to confirm the fix. To clarify scope, do you already have logging enabled for the auth flow, or should I add structured logs for quicker root-cause isolation? Are there specific auth libraries or middleware in use (e.g., Firebase, JWT, OAuth) that I should review first? I’m ready to dive into your repo, resolve the issue, and ensure your login works smoothly so the app can be shipped confidently.
₹7,000 INR in 7 days
0.0
0.0

Guaranteed results ✅, or zero cost to you ?. I understand your need to fix the stubborn authentication bug preventing user login in your Flutter app. With expertise in Dart and Flutter debugging, I can swiftly trace and resolve the issue, ensuring a seamless login experience across Android and iOS builds. While new to Freelancer, I have a wealth of experience in app development. Offering discounted rates to build my presence here, rest assured, my top-notch quality work will exceed expectations. I'm excited to connect and discuss how I can help with your project! Regards, Aashieq Joseph
₹6,250 INR in 14 days
0.0
0.0

This project aligns seamlessly with my skills—I’m built for it! I can quickly dive into your Dart codebase, diagnose the login failure, patch the code, and ensure a clean build for Android and iOS. I've recently joined Freelancer to bring the same high-quality work I've delivered off-platform to every client. I'm proficient in Flutter debugging and experienced in handling common auth stacks. Rest assured, I'll provide a solid fix that restores normal sign-in flow efficiently. Looking forward to your engagement! Kind regards, Jayden Finch
₹10,650 INR in 30 days
0.0
0.0

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