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I need a sharp-eyed Flutter / Node.js troubleshooter to pinpoint and fix an intermittent signup failure in my mobile app. The OTP step completes successfully, yet many users (on both iOS and Android) hit a wall when the form tries to create the account. No explicit error is returned to the UI, but the account never appears in the database. Here is what I can share right away: • Front end: Flutter 3.x, using MSG91 for phone-based OTP. • Back end: Node.js (Express) REST API, MongoDB. • Flow: user enters phone → receives OTP → OTP verified → form posts profile details → failure occurs after the POST. What I need from you is a fast, reproducible diagnosis, a clean code fix (whether in Dart, the REST endpoint, or both), and a short hand-off note so my team understands the root cause. Please come with solid debugging habits—Charles/Proxyman, Flutter DevTools, Postman, whatever gets you to a reliable solution—and be ready to test on both platforms before shipping the patch.
Projektin tunnus (ID): 40217618
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Aktiivinen 25 päivää sitten
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47 freelancerit tarjoavat keskimäärin ₹12 635 INR tätä projektia

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
₹12 000 INR 3 päivässä
7,0
7,0

Hello Client, Greeting of the day!!!! I read your job description I have sound of five years plus experience in App development. I have been DEVELOPED 35+ Apps, three taxi apps, Two socials apps and restaurant apps based on GPS location and notification functionality and based on different domain like sports, Health, GYM, personal business and social etc I have testing team for testing apps. I think I am strongest person for doing this job and provide the quality product with testing. I am always available for your support. Thanks Sr. Mobile Developer
₹11 111 INR 22 päivässä
6,6
6,6

Hey, I read the description and this issue appears after OTP verification, which strongly suggests the failure is happening between the Flutter form submission and the Node.js account-creation logic, not in MSG91 or the OTP flow itself. I’ll trace the request lifecycle end-to-end, payload from Flutter, Express middleware, validation, async handlers, and MongoDB writes—to pinpoint where the process silently breaks. How I solve this: I will reproduce the issue on both iOS and Android using Flutter DevTools, network inspection, and Postman to catch dropped responses, missing awaits, schema mismatches, or swallowed exceptions. Once identified, I’ll apply a clean fix in the exact layer responsible (Flutter, API, or DB) and verify that accounts are reliably created. You will receive a tested patch and a short handover note explaining the root cause, the fix, and what to monitor going forward to avoid similar silent failures. Let's connect in chat for quick discussion and proceed. Thanks!
₹12 000 INR 3 päivässä
5,1
5,1

Hello, I've gone through your JD and am ➤ ready to quickly diagnose and fix the intermittent signup failure in your Flutter + Node.js app by tracing the full OTP→POST→DB flow and reproducing the issue reliably. ➤ Scope: Deep debugging (Flutter + Express), OTP flow validation, API/DB inspection, clean fix in Dart and/or Node.js, cross-platform testing (iOS & Android), and a clear root-cause handoff note. Lets chat.. Thanks
₹5 000 INR 3 päivässä
4,6
4,6

Hello Mujibullah! I’m excited about the opportunity to help with your project. Based on your requirements, I believe my expertise in Node.js, MongoDB aligns perfectly with your needs. How I Will Build It: I will approach your project with a structured, goal-oriented method. Using my experience in Mobile App Development, NoSQL Couch & Mongo, Dart, Debugging, Node.js, Express JS, MongoDB, Flutter, REST API, I’ll deliver a solution that not only meets your expectations but is also scalable, efficient, and cleanly coded. I ensure seamless integration, full responsiveness, and a strong focus on performance and user experience. Why Choose Me: - 10 years of experience delivering high-quality web and software projects - Deep understanding of Node.js, MongoDB and related technologies - Strong communication and collaboration skills - A proven track record — check out my freelancer portfolio. - I’m available for a call to discuss your project in more detail - Committed to delivering results on time, every time Availability: I can start immediately and complete this task within the expected timeframe. Looking forward to working with you, Mujibullah! Best regards, Ali Zahid India
₹1 500 INR 7 päivässä
4,4
4,4

Hi — I can help quickly diagnose and fix the intermittent signup failure in your Flutter / Node.js app. I’ll reproduce the issue on iOS and Android, trace the flow from OTP verification to the final POST using Flutter DevTools, Charles/Proxyman, and Postman, identify the root cause (Flutter, API), and deliver a clean code fix plus a short hand-off note for your team. Let’s connect, share access/details, and get started right away. Best, Param
₹7 000 INR 3 päivässä
4,2
4,2

Hi there, I understand the intermittent signup failure in your Flutter app where the OTP verification succeeds but account creation fails silently. I’m confident in pinpointing this issue for both iOS and Android users. - Deep dive into Flutter frontend and Node.js backend flow to identify where the POST request fails. - Use advanced debugging tools (Flutter DevTools, Charles, Postman) for reliable reproduction. - Apply a clean, efficient fix in Dart or REST API to ensure seamless profile creation. - Provide clear, concise hand-off documentation explaining root cause and resolution. **Skills:** ✅ Flutter 3.x & Dart troubleshooting ✅ Node.js (Express) REST API debugging ✅ MongoDB and NoSQL database management ✅ Mobile app debugging tools: Charles, Flutter DevTools ✅ Reliable cross-platform testing & validation **Certificates:** ✅ Microsoft® Certified: MCSA | MCSE | MCT ✅ cPanel® & WHM Certified CWSA-2 I’m ready to start immediately and committed to delivering a quick, reliable fix with zero ambiguity. Could you share if there are any server-side logs related to this POST failure or any specific network responses captured during the failure? Best regards,
₹3 000 INR 3 päivässä
3,0
3,0

Hello There I have more than three years of practical experience in developing mobile applications (Android + IOS + admin panel). I have developed more than 50 successful apps so far for many clients within a timeline. I always believe in quality at work. I am looking forward to working on your project and will not disappoint you in terms of quality of work, deadline and communication. Let's have a quick conversation to discuss the task, budget and time frame. I have uploaded more than 50 applications to Google and Apple Waiting for your response
₹7 000 INR 7 päivässä
3,0
3,0

Hi, I’m an experienced Flutter + Node.js developer and can quickly reproduce and diagnose the signup failure you’re facing. I’ll trace the full OTP → POST → database flow, identify the root cause, and deliver a clean, tested fix along with a short hand-off note for your team. I focus on reliable debugging, proper logging, and production-safe patches across both iOS and Android. Regards, Rajni
₹7 000 INR 7 päivässä
2,3
2,3

As a seasoned developer, I understand the importance of fast, reliable solutions in a world where technology hiccups can mean significant consequences for your business. With extensive experience in both Flutter and Node.js, I am not only able to isolate the source of this frustrating bug, but I can also offer sustainable fixes and provide your team with a comprehensive understanding of its root cause. Throughout my career, I have consistently demonstrated my knack for debugging and problem-solving - driven by meticulous attention to detail. Your project would benefit greatly from my fluency in tools such as Charles/Proxyman, Flutter DevTools, and Postman. Combining these assets with a penchant for thorough testing on multiple platforms, I can deliver the stable bugs-free code you seek. What sets me apart beyond debugging capabilities is my commitment to delivering long-term value. Beyond just fixing the bug, I ensure the diagnosed issue is fully addressed through robust code improvements. As experienced backend developer savvy in both Node.js and Express framework, I know my way around REST APIs and databases like MongoDB. Choosing me means choosing not just a quick fix, but an investment in an app that will continue to function optimally moving forward. Let's join forces to eradicate this bug once and for all!
₹2 500 INR 1 päivässä
0,9
0,9

Intermittent signup bugs like this are usually about one small break in the handoff between client and server. From what you described, the OTP verification completes correctly, but the failure happens right after when the profile data is posted and the account should be created. There is no visible error on the UI, yet nothing is written to MongoDB. That points to a silent backend rejection, validation issue, or an unhandled async or promise path. I read the flow carefully, including Flutter 3.x on the frontend, MSG91 for OTP, and a Node.js Express API with MongoDB. The fact that it affects both iOS and Android suggests the issue is not platform specific but sits in the API contract, request payload, or server side logic after OTP success. I have debugged similar cases where missing awaits, schema validation, race conditions, or mismatched field names caused silent failures. My approach would be to reproduce the issue, trace the request with proper logging and tools, verify the API response path, and fix it cleanly in the right place rather than adding workarounds. Once resolved, I will document the root cause so your team can avoid the same issue later. Can you share the signup endpoint code and the exact payload sent after OTP verification?
₹12 500 INR 7 päivässä
0,0
0,0

Hello, I’ve reviewed your signup flow and the issue you’re facing after OTP verification. I’ve worked on similar Flutter + Node.js systems where silent failures occurred due to API validation, async handling, middleware logic, or database write conditions. I can help you reproduce the issue reliably, trace the request from Flutter to the Express endpoint, and identify why the account creation fails without returning an error. I’m comfortable debugging with Flutter DevTools, Postman, API logs, and request inspectors, and I’ll test the fix on both Android and iOS. What I’ll deliver: Root-cause analysis with clear explanation Clean, minimal code fix (Dart / Node / both) Verified account creation in MongoDB Short hand-off note for your team I can start immediately and focus on fast resolution. Best regards, Vivek Kumar
₹7 000 INR 5 päivässä
0,0
0,0

I am Karan, a professional Full-Stack and Flutter Developer with experience in delivering scalable, secure, and performance-driven digital solutions. I specialize in web application development, cross-platform mobile applications for Android and iOS, and custom software solutions. My technical expertise includes AI-based systems, chatbot development, workflow automation, and seamless third-party integrations. I follow industry best practices, write clean and maintainable code, and focus on modern architecture and optimized performance. I work closely with clients to understand business requirements and deliver reliable, user-centric solutions with timely execution and long-term technical support.
₹1 500 INR 1 päivässä
0,0
0,0

Hi, I’m Sanket, a Flutter & Node.js developer with strong debugging experience in OTP-based auth flows and MongoDB-backed apps. I’ve fixed similar intermittent signup issues where OTP succeeds but account creation silently fails. I can quickly: Trace the issue using Flutter DevTools, Postman, and network logs Debug both Flutter (Dart) and Node.js/Express sides Identify root causes like async race conditions, validation failures, or DB write issues Apply a clean, safe fix and verify on both Android & iOS Share a short handover note explaining the exact issue and solution I follow a reproducible, test-first debugging approach and focus on production-safe fixes, not guesswork. Ready to start immediately and resolve this fast.
₹5 500 INR 2 päivässä
0,0
0,0

Hi, I have 8+ years of experience in backend and app debugging and have fixed similar cases where signup works up to OTP but fails at account creation. I can trace the request after OTP, identify why data is not saved in MongoDB, and apply a clean fix in the Node.js API or Flutter code. I can start debugging immediately and deliver a clear root-cause note. Thanks, Jaffer I.
₹6 000 INR 2 päivässä
0,0
0,0

I can resolve this flutter problem within 3-4 hours with no other extra charges. I do my best in all things.
₹3 000 INR 1 päivässä
0,0
0,0

Hello , I read through your description of the signup flow, and it looks like this is a back-end failure after confirming the OTP and not an issue with the Flutter UI. The fact that the POST is completing but the user does not exist in MongoDB suggests that there is likely to be an issue with either a silent API or an issue with the async logic. I work with Node.js (Express), MongoDB, and Flutter-based APIs, and my process would be: 1. Attempt to reproduce the issue with logs from both Flutter and Postman 2. Inspect the POST handler for signup to see if there is any validation error, async/await missing, or a write error. 3. Check Mongo writes, indexes, and error handling. 4. A clean patch of the issue (back-end or Dart if needed). 5. Briefly document the root cause of the issue and how to fix it. I focus on clean debugging, minimal changes, and stable operation and I am willing to verify both platforms before closing. If you would like, you could send me the signup endpoint and the logs and I can get started right away. - Ishu
₹2 250 INR 3 päivässä
0,0
0,0

Hello, I have solid experience working with Flutter (Android & iOS), especially in debugging complex, intermittent production issues involving authentication flows and async APIs. From your description, the OTP step completes successfully, but the account creation fails silently after the profile POST request. This strongly suggests issues such as: race conditions or async flow interruptions, validation or schema mismatches, unhandled promise rejections, timeouts or API response handling problems on the Flutter side, or silent failures at the database write layer. What I will do: Reproduce the issue end-to-end using Postman, Flutter DevTools, and network inspection tools (Charles / Proxyman). Inspect and log the full request/response lifecycle after OTP verification. Validate backend logic, MongoDB writes, and error handling. Identify the root cause and apply a clean, maintainable fix (Flutter, Node.js, or both). Test the fix on Android and iOS. Deliver a short technical report explaining: the root cause, what was fixed, and how to prevent similar issues in the future. I focus on clear diagnostics, reproducible fixes, and production-safe solutions. Looking forward to helping you stabilize this flow. Best regards, Lucas Andrade
₹12 000 INR 5 päivässä
0,0
0,0

Hi, I’ve dealt with this exact signup issue before—OTP verifies fine, but the account creation fails silently and nothing ends up in the database. These bugs usually hide in the handoff between Flutter and the Node.js API, not in one place alone. I’ll start by reproducing the issue properly (Charles/Proxyman, Flutter DevTools, Postman), compare failing vs successful requests, and trace the flow through the backend until we see exactly where it breaks. From experience, it’s often an async handling issue, payload mismatch, or validation silently rejecting data. Once identified, I’ll apply a clean fix (Flutter, backend, or both), make sure errors are surfaced correctly, and test the full flow on both iOS and Android before shipping. You’ll get a clear root cause, a solid fix, and a quick handoff so your team knows what went wrong and why it won’t happen again.
₹8 000 INR 7 päivässä
0,0
0,0

I can help you quickly pinpoint and fix this signup issue. I’ve worked with Flutter + Node.js + MongoDB systems where OTP succeeds but account creation fails silently, so I know how to debug this flow properly. I’ll reproduce the problem, trace the request from Flutter to your API, and inspect what happens after the POST (validation, async logic, or DB writes). I use Flutter DevTools, Postman, and network inspection tools to get clear answers. You’ll get: A clean code fix (Dart, backend, or both) A short explanation of the root cause Verified testing on both iOS and Android I can start immediately and, in most cases, deliver a working fix within one hour.
₹9 000 INR 1 päivässä
0,0
0,0

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