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Hi — we need urgent help with an existing mobile app project. We have a live Android and iOS app but lost access to the original source code. We only have APK builds and backend/admin access. We need an experienced developer who can recover from apk's etc and stabilize the project. We have a live Android and iOS app where the previous developer became unreachable. The client has full access to Firebase backend and Google Play/App Store accounts, but we don’t have the original frontend source code. We do have APK/build files and admin access. There is a critical login issue affecting users that needs immediate stabilization. After that, we want to rebuild a proper development pipeline and recover the project long-term. We’re looking for someone experienced in app recovery, reverse engineering, and production maintenance. Can you review the situation and let us know your approach and availability?My UK client runs a real-money financial trading app that ships on both iOS and Android. Until a few weeks ago users everywhere could sign in without a hitch, yet logins coming from Egypt now fail at the authentication step even though nothing has changed in their credentials. The current developer has become unresponsive, so I need the issue diagnosed and resolved quickly. Scope of work • Audit the existing mobile code and any linked backend/auth services to pinpoint why Egyptian traffic is rejected or mis-handled. • Patch the root cause so users in Egypt can sign in exactly as before, without breaking access in other regions. • Regression-test the fix on the latest iOS and Android builds (I will supply TestFlight and Play Console access). • Provide a concise hand-over report describing the cause, the applied remedy, and any recommended follow-up improvements. Acceptance criteria 1. A test account I provide must log in successfully from an Egyptian IP (I will verify through a VPN and with a local tester). 2. No new authentication failures appear in other geos. 3. Your change set is pushed to our repo with clean, commented code and passes existing unit/integration tests. I’m open to additional hardening—two-factor auth, biometric login, CAPTCHA, etc.—once the immediate outage is fixed. After that, I intend to keep the right person on a monthly maintenance retainer of ₹10-11 k, so think of this as both a rescue task and a paid trial for ongoing work.
Projektin tunnus (ID): 40237986
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Aktiivinen 13 päivää sitten
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26 freelancerit tarjoavat keskimäärin ₹8 663 INR tätä projektia

As an experienced mobile developer, I understand the depth of the issue you're facing with your trading app and the urgency to resolve it. My team and I have been offering app recovery and reverse engineering services for over a decade now, successfully handling similar situations where clients had partial access to their code. Rest assured, this setback does not bring us down but rather adds to our excitement of getting your app back on track! Regarding the critical login issue and its erratic behavior specifically in Egypt, I'm confident in my skills to conduct a thorough code audit, identify the root cause, and implement a targeted solution without affecting user accounts in other regions. My expertise also stretches into regression testing and providing detailed documentation for seamless hand-overs. While resolving the immediate login crisis is my top priority, I must tell you that your long-term vision for this project aligns perfectly with what we specialize in. We can not only fix your app but also help you build a stable environment using suitable versions like Flutter or its equivalent. Maintaining this long-term relationship is something we value as it showcases our expertise beyond mere troubleshooting.
₹2 500 INR 7 päivässä
4,6
4,6

I have 6.5+ years of experience handling production mobile apps (Flutter, native iOS & Android), including authentication failures, geo-based blocking issues, and backend recovery. First, I need to clarify: If source code is completely unavailable, APK/IPA reverse engineering can help inspect logic but proper stabilization requires rebuilding or recovering the original codebase. I can assist with both emergency debugging and long-term recovery. For the Egypt login issue, my approach: 1️⃣ Audit Firebase/Auth + backend rules + IP filtering + region-based API/firewall/CDN configs 2️⃣ Inspect token validation, OAuth flows, and any geo-blocking or payment/trading compliance restrictions 3️⃣ Reproduce failure via Egyptian IP (VPN + local tester) 4️⃣ Patch safely without affecting other regions 5️⃣ Regression test on both platforms Common causes in similar cases: • Geo-blocked IP ranges (CDN / Cloudflare / firewall) • Firebase Auth regional restrictions • SSL / certificate validation issues • API domain filtering • Regulatory compliance flags Deliverables: ✔ Egyptian login restored ✔ No regressions globally ✔ Clean, documented fix ✔ Recommendations for hardening (2FA, biometric, rate limiting) I’m available immediately for urgent stabilization and open to ongoing monthly maintenance. Let’s start with backend + auth audit access and app build details.
₹10 500 INR 5 päivässä
4,6
4,6

As an accomplished mobile app developer with expertise across both Android and iOS platforms, I am equipped to tackle your pressing trading app login issue. My extensive 8+ years journey in app development and backend service development, enables me to audit your existing mobile code proficiently and identify why the Egyptian traffic is being rejected. Moreover, my innate problem-solving aptitude offers the assurance that I will patch the root cause without disrupting access in other regions. My robust technical repertoire covers everything from Figma, React, and Node.js, to Flutter, Native iOS/Android, Java, and PHP. This affirms my ability to skillfully regression-test the proposed fix on the latest iOS and Android builds — a task I accept with utmost precision. I have an unwavering commitment to delivering clean, well-commented codes that will seamlessly pass existing unit/integration tests. What sets me apart is my holistic approach. Your project isn't simply solving a bug; it's about rescuing a critical system, ensuring flawless performance going forward while offering room for future enhancements. This is where my comprehensive experience in-database optimization, Firebase Integration and Social Media Integration (plus more) proves immensely valuable. Trusting me with this project means getting an unwavering commitment to your satisfaction. Let's make it happen!
₹7 000 INR 7 päivässä
3,4
3,4

Hello, I have extensive experience in developing and maintaining financial trading apps on both iOS and Android. - Plan: - Assess the current app for issues - Implement fixes for login and access - Conduct thorough testing - Provide ongoing support - Tech Stack: Flutter, Dart, Firebase, REST APIs - Timeline: Initial assessment within 2 days, fixes implemented in 5 days, followed by testing. - Communication: Regular updates via your preferred platform. Choose me for my proven track record and commitment to delivering quality results. What specific issues are you facing with the login? Do you have any preferred tools for communication? Regards, Bharti M.
₹17 000 INR 7 päivässä
2,9
2,9

Hi, Egypt-specific login failures on an unchanged codebase point to a few likely culprits — IP/geo-blocking on the auth provider, a region-restricted API endpoint, or a certificate/SSL issue affecting Egyptian network paths. My immediate approach: Audit: Review auth flow, backend logs, and any third-party auth services (Firebase, Auth0, OAuth) for geo-filtering rules or IP blacklists targeting Egyptian ranges. Diagnose: Replicate the failure using an Egyptian IP via VPN, isolate the exact failure point — client, backend, or provider level. Fix: Patch the root cause without touching global auth logic. Clean, commented commit to your repo. Test: Regression test on both TestFlight and Play Console builds. Verify Egyptian IP login using your test account and local tester. Handover: Concise report covering cause, fix, and hardening recommendations (2FA, biometric, CAPTCHA).
₹7 000 INR 7 päivässä
2,6
2,6

Hi ? This is exactly the kind of app rescue + stabilization work I handle. Losing source access happens more often than people admit — the good news is it’s recoverable. Immediate priority: fix the Egypt login failure. I’ll audit APK/build behavior + Firebase/auth/backend configs to identify whether it’s: • Geo/IP blocking or Firebase rule issue • API/auth token mis-handling • SSL/cert or region-based endpoint failure • App-side validation or outdated SDK calls What I’ll deliver • Root-cause diagnosis + fast patch for Egypt login • Tested on real devices + VPN geo testing • Recovered/rebuilt dev pipeline (Android + iOS) • Clean repo with documented fixes • Handover report + how to avoid this again I work fast, communicate clearly, and I’m comfortable stepping into messy or abandoned projects. Available to start immediately and can stay on monthly maintenance after stabilization. Let’s get your users logging in again — and your project back under control
₹7 000 INR 7 päivässä
2,7
2,7

Hi, I understand this is urgent, especially for a financial trading app. I’ll audit both the mobile login flow and backend authentication services to identify why logins from Egypt are failing — checking for geo/IP restrictions, firewall or WAF rules, token validation issues, or region-based API misconfiguration. Once the root cause is identified, I’ll apply a clean fix and thoroughly regression-test on iOS and Android to ensure no other regions are affected. You’ll receive a clear report explaining the issue and the fix, and I’m open to continuing on a monthly maintenance basis once this is stabilized.
₹11 000 INR 30 päivässä
2,3
2,3

Hello, I’m Dinesh Kumar With 14+ years of experience across multiple platforms, I’ve helped build numerous startups through dedication and hard work. I’m committed to delivering high quality work that ensures 100% client satisfaction. Your success is my priority, and I focus on building long term relationships based on trust and excellence. Expertise: Web & App Development – React.js, Node.js, JavaScript, PHP, MySQL, WordPress, Magento, CodeIgniter, Shopify, .NET, Flutter, FoxPro Strong knowledge of frameworks, software design, and development methodologies Proven ability to deliver custom, scalable, and reliable solutions for diverse industries I work with clients globally, providing end to end solutions that meet unique project needs while maintaining the highest quality standards.
₹7 000 INR 7 päivässä
2,3
2,3

EXPERT ((Android App Development, API Development, Testing / QA, Flutter, Mobile App Development, iOS Development, Android, iPhone and Backend Development)) DEAR EMPLOYER, I’ve completed the exact same projects before successfully. Awarding me will be the fastest way to complete your task with the best rates possible. I CAN ASSURE YOU 100% THAT WE ARE FULLY CAPABLE OF EXECUTING ANY LEVEL OF TASK/PROJECT BASED ON THE SKILL REQUIRED. I am fully confident about our skills and my understanding of the project description and we are ready to go through any test or sample task you assign to acquire your trust. Let me know when are you available for an initial 15-30-minute discussion (FREE OF CHARGE) so we can discuss the requirement in detail and I can walk you through the mentioned systems to acquire your trust in my skill. REST ASSURED YOUR WORK IS IN VERY SAFE AND PROFESSIONAL HANDS. THANK YOU
₹1 500 INR 3 päivässä
0,0
0,0

Based on my CEO's experience with Prime Code Tech in delivering digital solutions and leading projects similar to yours, I firmly believe we can excel at finding the root cause of your app's authentication failure and restoring it. One of the crucial aspects of providing efficient digital solutions is the ability to quickly diagnose and fix issues, which aligns perfectly with your current needs. No matter if it's Android or iOS, or if it involves frontend or backend, our experts are adept at handling different parts of app development, including API and backend development, crucial for solving issues like the one you are facing. When you entrust us with your project, know that we put your goals beyond mere requirements by aiming to understand the root cause instead of applying quick fixes. With us working on your project, you'll have a strong digital transformation partner who is familiar with advancements in authentication technology like two-factor auth, biometric login^ and CAPTCHA.
₹10 000 INR 5 päivässä
0,0
0,0

Hello, I can step in immediately to diagnose and resolve the Egypt-specific authentication failure without disrupting other regions. Geo-restricted login issues typically stem from IP filtering, CDN/firewall rules, OAuth redirect mismatches, SMS/OTP provider blocking, or backend geo-validation logic—so I’ll audit both mobile and backend layers systematically. I’ve handled similar geo-auth incidents in fintech/mobile trading apps involving regional IP blocking and API gateway misconfiguration: Scope execution: • Review mobile auth flow (iOS/Android) and API calls • Inspect backend auth service, firewall/CDN (Cloudflare/AWS), and geo rules • Test via Egyptian IP (VPN + log tracing) • Patch root cause safely • Regression test across regions • Push clean, documented commit to repo • Deliver concise technical handover report I’m comfortable working with TestFlight, Play Console, and production-sensitive fintech environments. After stabilizing, I can also implement hardening (2FA, biometrics, anti-bot protections). One key question: Is authentication handled through a third-party provider (e.g., Firebase Auth, Auth0, Cognito) or a custom backend service? I can begin immediately and treat this as a priority rescue task.
₹7 000 INR 7 päivässä
0,0
0,0

Hi there, You’re absolutely in the RIGHT PLACE. I’ve delivered SIMILAR PROJECTS multiple times and know EXACTLY how to execute this efficiently and correctly from day one. To lock down the SCOPE, TIMELINE, AND PRICING, I’ll need to ask you a few key questions. Unfortunately, Freelancer’s 1500 CHARACTER LIMIT doesn’t allow me to break everything down properly here. Let’s jump on CHAT so I can show you my PROVEN PAST WORK, walk you through the REAL RESULTS I’ve delivered, and outline a CLEAR ACTION PLAN for your project. You’ll immediately see why my approach is DIFFERENT and EFFECTIVE. If you’re serious about getting this done RIGHT, I’m ready to move forward. Looking forward to CONNECTING and WINNING TOGETHER. Cheers, Aayushaman Sahu
₹7 000 INR 7 päivässä
0,0
0,0

Hello, Greetings! I’m a senior full-stack developer with 6+ years of experience in building scalable mobile and web applications. I specialize in cross-platform and native mobile development using Flutter, React Native, Swift (iOS), and Kotlin/Java (Android), along with strong backend expertise in Node.js, Django, FastAPI, and Laravel, supported by modern cloud technologies. My team and I build end-to-end mobile solutions including custom dashboards, internal tools, automation systems, role-based platforms, secure APIs, real-time features, payment integrations, push notifications, and complete app store deployments. We focus on creating smooth user experiences, clean architecture, and reliable performance. We’ve worked on numerous mobile projects with different requirements and complexities, helping clients turn their ideas into well-designed, high-performing applications. Your project aligns well with our technical skills and development approach. I’d be happy to discuss your project scope, ideas, and goals, and suggest the best technical approach. Best regards, Suman Joshi
₹8 000 INR 7 päivässä
0,0
0,0

As an experienced developer with a decade-long track record of superior app development, I am confident that I can quickly assess and stabilize your Trading App Login issue. My skill set includes both Android and iOS development, and I have successfully dealt with similar situations in the past where source code was lost. In addition to my technological proficiency, I believe in clear, consistent client communication. You will have complete visibility into every step of the process as I diagnose, resolve, and test your login issue across platforms. This transparency will continue even after this immediate problem is resolved - as you mentioned plans for a long-term recovery of the project. As indicated on my website, TechOTD Solutions consistently provides impactful and high-functioning digital solutions. We not only believe in getting things done promptly but also maintaining a high level of performance after. Therefore, my commitment to ensuring that your app operates smoothly even after we recover it from a difficult position aligns well with your need for ongoing maintenance. Partnering with TechOTD Solutions means gaining a steadfast partner in your company's success!
₹7 000 INR 7 päivässä
0,0
0,0

Hello, I’ve reviewed your project details and understand your need for a reliable and well-performing mobile application. I have 3 years of hands-on experience in mobile app development, focusing on performance, stability, and smooth user experience. I work with Android Studio, Flutter, VS Code, Firebase, and Figma to handle both development and interface flow efficiently from start to finish. Please share your app requirements or feature details so I can proceed with a clear plan and deliver on time. Best regards, M. AbouBaker
₹7 000 INR 7 päivässä
0,0
0,0

As an experienced developer in system recovery and application maintenance, I specialize in diagnosing and resolving critical login and authentication issues in trading applications quickly and securely. For your Trading App Login Fix, my approach includes a full technical assessment of the authentication flow, API connections, server responses, database validation, and security configurations to identify the root cause of the issue. Whether the problem stems from API failures, token/session handling errors, database conflicts, rate limits, or security misconfigurations, I will implement a stable and secure solution. My process includes: • Debugging login authentication (JWT, OAuth, session handling) • Fixing API integration and server-side validation issues • Resolving database connection or user credential errors • Addressing “too many requests” or rate-limit blocks • Ensuring secure encryption and proper access control • Testing across devices to confirm stability • Implementing preventive measures to avoid future login failures Beyond fixing the issue, I focus on long-term maintenance and system stability to ensure your trading app remains secure, reliable, and fully functional for users. My goal is to restore seamless login functionality while strengthening the overall security and performance of your application.
₹7 000 INR 3 päivässä
0,0
0,0

GSINFOTECH OPC Pvt. Ltd. – Your Trusted Tech Partner Based in New Delhi, GSINFOTECH OPC Pvt. Ltd. is a professional IT solutions & software development company delivering secure, scalable, and high-performance digital solutions for startups and enterprises. We help businesses convert ideas into powerful, market-ready products. Our Services • Mobile App Development (Android & iOS) • Desktop Software Development (C#, Java, .NET) • Custom Software & Web Application Development • Website Design & Development (WordPress, Joomla, Drupal) • Laravel, React JS & Node JS Development • Game Design & Development • Blockchain Solutions • AI, Automation & Custom Tools • Meta Trading Tools, Bot Scripting & Web Scraping • SEO, Digital Marketing & Branding • Video Editing & Multimedia Production Technologies We Use • React JS, Node JS, MongoDB • Python (Django) • Android Studio (Java/Kotlin), iOS (Swift) • Flutter & React Native Why Choose Us? ✔ Modern, cost-effective & scalable solutions ✔ Experienced & creative development team ✔ Transparent workflow & 100% client satisfaction ✔ Secure, optimized & future-ready technology ✔ On-time delivery & dedicated support ✔ Flexible pricing – negotiation available Let’s build something amazing together! Hire GSINFOTECH OPC Pvt. Ltd. to take your project to the next level.
₹1 500 INR 7 päivässä
0,0
0,0

Hello, I am familiar with this task. I can start the work immediately once u awarding me. kindly chat with me we can discuss details and better understanding of your vision. I will provide u 100% correct work. thanks
₹7 000 INR 7 päivässä
0,0
0,0

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