Flutter Realtime Chat & Notifications Upgrade

@ominfowave

Hello We are Ominfowave Software Services Pvt. Ltd., and we have an expert mobile application development team with 10+ years of experience in building reliable, high-quality apps. ? Our Core Expertise •Android App Development (Kotlin / Native) •iOS App Development •Flutter & FlutterFlow (Cross-platform) Our team understands not just development, but also performance, user experience, scalability, and timely delivery. ? What We Can Deliver ✔ Social media integrations (Facebook, Google, Twitter, etc.) ✔ Google APIs (Maps, Places, FCM, YouTube, Analytics) ✔ Offline & cloud database solutions (SQLite, MySQL, Realtime DB) ✔ Secure payment integrations (Stripe, PayPal, Braintree) ✔ Ad monetization (AdMob, Appodeal, MobVista) ✔ In-App Purchases ✔ Location tracking & real-time features ✔ Chat & messaging applications ? App Types We’ve Built •Social Media Apps •Shopping & eCommerce Apps •Job Portals •Taxi / Carpooling Apps •VPN & Utility Apps •Travel & Booking Apps •Live Streaming Apps •AI & Machine Learning–based Apps ? Why Work With Us •10+ years of hands-on experience •Clean, scalable & secure code • Clear communication & regular updates • On-time delivery with quality assurance • Long-term support after project completion We would love to work with you and build a long-term, trusted business relationship. Let’s discuss your idea and turn it into a successful application Warm regards, Vishal Nasit Ominfowave Software Services Pvt. Ltd.

@joomextensions

I have direct, hands-on experience with Flutter, Agora SDK, Firebase FCM, and CallKit/full-screen call notifications in production apps, which is exactly what you need to fix these reliability issues. I'll conduct a thorough audit and address: FCM/APNs delivery in all app states (foreground, background, killed), Agora call connection and reconnection handling, CallKit integration for proper iOS full-screen notifications, call lifecycle tracking and analytics instrumentation, wallet deduction and session management consistency, and real-time state synchronization edge cases. My goal is production-grade reliability matching leading consultation apps. I'll provide a detailed bug report with root cause analysis before making changes, ensuring transparent, traceable fixes. Available to start immediately. Regards, Harsh Thoriya

@mrresearcher99

Hello, I have 10+ years of experience in Flutter, Firebase, FCM, APNs, Agora SDK, VoIP applications, and large-scale real-time systems. I have worked on production mobile applications involving audio/video calling, push notifications, session management, payment systems, and real-time synchronization. Since your application is already developed, I can perform a comprehensive audit of the existing codebase, infrastructure, notification flow, and Agora implementation to identify the root causes of the production issues. I can optimize FCM/APNs delivery across foreground, background, and terminated states, improve CallKit/full-screen incoming call reliability, strengthen Agora connection and reconnection handling, and ensure accurate call lifecycle tracking and analytics. I can help stabilize the platform and bring it closer to enterprise-grade calling application standards. Best Regards

@KarthikTechCon

Hello, I'm Karthik, a Mobile Application Architect with 15+ years of experience building real-time communication platforms, Flutter applications, VoIP systems, Firebase integrations, and scalable backend architectures. Your requirement is not about developing new features but stabilizing production behavior, which is where my expertise can help. I can perform a detailed audit of the current Flutter, Agora, and Firebase implementation to identify the root causes of notification failures, call connection issues, state synchronization problems, wallet inconsistencies, and session lifecycle gaps. I have experience with FCM, APNs, CallKit, Android full-screen call notifications, Agora RTC, WebSockets, Firebase, and real-time event-driven systems. My approach focuses on improving reliability across foreground, background, and terminated app states while implementing proper logging, analytics, reconnection handling, and fail-safe workflows. The goal will be to achieve production-grade stability similar to large-scale calling and consultation platforms by addressing race conditions, notification delivery issues, state mismatches, and edge cases that typically appear only in live environments. I can start with a technical audit and provide a clear action plan before implementing fixes. Regards, Karthik

@mohjib092

Hi, I can audit and stabilize your Flutter calling system across FCM/APNs, CallKit/full-screen notifications, Agora connection handling, wallet deductions, session lifecycle, and realtime synchronization to identify production issues and make the app reliable under foreground, background, and killed-state conditions. Regards, M. Jibran Ahmed

@akgarg007

Red Fox Hi, I read through the full description and appreciate how detailed the scope is. Having the PRD, screen specs, user flows, and design system finalized upfront makes execution much smoother. I’m comfortable working with FlutterFlow, Firebase, and custom Dart actions, and I understand that this project is about building accurately to spec rather than redesigning the product. The areas I can help with include: Building all Phase 1 screens in FlutterFlow Firebase Authentication (Email, Google, Apple) Firestore integration and user data flows RevenueCat subscription setup (monthly/annual plans) OneSignal notifications Firebase Cloud Functions for server-side streak logic App Store / Play Store release support Clean project handoff and GitHub delivery I’m also comfortable working in milestone-based increments and providing short walkthroughs as features are completed. A couple of questions: Will the provided PRD include the exact RevenueCat entitlement and paywall flow, including restore and grace-period handling? Are onboarding flows included within the 11 screens, or are those being handled separately? If we're aligned on scope, I'd be happy to review the PRD and start immediately. Best regards, Ashwani

@Govind7877190814

Hi, I would like to grab this opportunity and will work till you get 100% satisfied with my work. I just applied after read your job posting carefully and I believe that I am good fit to your project. I'm a serious bidder. I will satisfy you with my high skills! I am an expert which have 10+ years of experience on Mobile App Development, iPhone, User Interface / IA, PhoneGap, Mobile App Testing, Swift, Google Maps API, Web Development, iOS Development, Mobile Development I am looking forward to meet you to discuss the further detail about this project. Looking forward to hearing from you. Warm Regards

@letscms

Hi, I have hands-on experience with Flutter, Agora, Firebase FCM, APNs, CallKit, and production-grade realtime communication systems. I can quickly audit your live environment and identify the root causes behind missed call notifications, Agora connection issues, wallet/session inconsistencies, and state synchronization problems. My focus will be on FCM/APNs delivery across foreground, background, and killed states, CallKit/full-screen notification reliability, Agora reconnection handling, analytics tracking, and realtime event consistency. I have worked on similar consultation and calling applications where issues only appeared in production. I can start immediately, analyze logs, review the current architecture, and provide both short-term fixes and long-term stability improvements. Looking forward to discussing the production issues in detail. Best Regards Jitendra Sharma

@iimtpradeepdash

Hi! Your need to tighten call notifications and Agora reconnection—especially under real production load—is the real pain point. I see a lot of teams get FCM/APNs working in dev but hit missed calls or double rings when the app is killed or switching states live. I worked on GitaPath, a Flutter app with call, wallet, and full-state sync, and handled sticky FCM/APNs issues plus Agora reconnect and analytics setup. My approach: start with a detailed audit to trace where state loss, delayed FCM/APNs, or wallet drift happens. Then real-world test calls in each device state, and harden reconnection with robust session recovery. Quick one—do you already log device/app state for failed calls, or will I need to add that trace layer? It speeds up fixing invisible bugs. Happy to send a free audit plan listing the main fail-points I'd check first. You can also see similar live app work at work.techindika.com. — Pradeep

@Ak230598

Hello, I can create/modify the app/web as you wish. I have 6.5+ years of experience in this field. Let's connect and discuss more about your requirements. Thank you.

@fullstack0407

I have read your job post and I would love to help audit and stabilize your calling platform. I am a Full Stack and Flutter Developer with experience in Agora SDK, Firebase FCM, APNs, CallKit, VoIP notifications, real-time communication systems, and production-scale mobile applications. I have worked on apps involving audio/video calling, push notifications, session management, payment logic, and real-time synchronization where reliability in production environments is critical. My approach is to first perform a complete audit of the current architecture, logs, notification flow, Agora integration, and backend communication patterns to identify the root causes of intermittent production issues. The solution will include improving FCM/APNs delivery across foreground, background, and terminated states, strengthening Agora connection and reconnection handling, validating wallet deduction workflows, implementing accurate call lifecycle tracking, improving state synchronization, and adding monitoring and analytics to detect failures early. The goal is to achieve a stable, production-grade calling experience similar to leading consultation and communication platforms.

@shibbuquadir

Drawing from our deep understanding of backend development and mobile app development technologies, including the framework which this project centers around - Flutter, we are confident that we can deliver the real-time chat and notifications upgrade you need. Our vast experience in handling large-scale systems would be invaluable here, especially with ensuring your calls' reliability during foreground, background, and killed state. Moreover, our knowledge of Agora and Firebase FCM will enable us to handle call connections perfectly and manage session-related operations such as wallet deduction and synchronization effortlessly. We understand that timing is crucial in the calling/consultation industry, which is why we always prioritize a robust call lifecycle tracking system to ensure optimal connections and even offer analytical insights into your processes for higher efficiency. Choosing Paper Perfect means choosing a team dedicated to elevating your digital presence with timely delivery of exceptional results within budget promises. We'd love to bring our enthusiasm for creating intuitive and user-friendly mobile applications, combined with our commitment to quality, to successfully solve your existing issues and make your application production-grade reliable. So don't hesitate, let's make your application even better!

@Baber512

Hello, I have read your Complete proposal your Need a Experienced Flutter developer for realtime chat app and upgrade notification. I have more than 3 years of work experience in Mobile application developemnt have a hand-on expeirence in Many terms like Figma to Flutter, Firebase, Google maps and Rest APIs integrations I am Confident that will handle your task in a reasonable price and time and I am available to start working on it Let's chat to Proceed

@guptakishan805

When it comes to mobile app development and software architecture, I've logged in years of experience that are directly suited to your project. My name is Kishan Kumar, and my skills extend across Android, iPhone, and of course, Flutter. The specific expertise you require for robust notification and call handling, synchronisation and working on large-scale realtime systems - these have long been the cornerstones of my craft. At heart, I believe in not just creating applications but building entire ecosystems. My long-term growth mindset will be an asset as we work through your incoming call notification and FCM/APNs delivery issues. Additionally, my proficiency in Agora and Firebase FCM will empower me to audit your Agora call connection and implement much needed reconnection handling. More than just developing effective solutions, I am a technology partner who believes in planning, crafting MVPs that translate into robust production-ready systems, and fostering strong relationships with clients. This means I won't just ensure your Flutter Realtime Chat & Notifications Upgrade works impeccably, but that it lays a foundation for future scalability. (Please note that while my profile doesn't explicitly mention CallKit/full-screen call notifications, I have ample experience in delivering on these frontiers).

@Visharaa2024

For a project as intricate as upgrading your real-time chat and notification system, it's essential to have a seasoned expert by your side, and I believe I'm that individual. With over 8 years in mobile app development, I've honed my skills across a broad range of technologies, including Native Android, iOS, React-Native, and of course, Flutter. My prolific body of work - 100+ projects with top-notch results - is a testament to the quality I'm committed to bringing to every endeavor. In particular, my extensive experience with Flutter sets me apart from other freelancers. This is one area where many freelance developers simply cannot compete. My proficiency with Firbase FCM combined with not only great familiarity but substantial project implementation using Agora will be a significant asset in solving the existing issues. I understand the intricacies of call lifecycles, interactions with FCM/APNs during various device states (foreground, background, killed state), and making robust high-scale systems.

@dushyant317

I can audit and harden your Flutter calling platform by diagnosing FCM/APNs delivery issues, improving Agora connection reliability, stabilizing CallKit/full-screen incoming call flows, validating wallet/session logic, and implementing production-grade monitoring to achieve consistent real-time behavior in live environments.

@ApieTech

FCM delivery in background/killed states, CallKit full-screen incoming call notifications, and Agora reconnection handling are exactly the issues we've debugged in production Flutter apps. Our approach: audit your FCM token refresh logic and notification payload structure first, then test the Agora call lifecycle (accept/decline/disconnect/missed) across foreground/background/killed states on both iOS and Android. Wallet deduction race conditions and realtime session sync issues typically trace to overlapping stream listeners — we've resolved those patterns before. Ping me with a quick overview of where drop-offs are most frequent, and we'll scope the fix.

@tamannarajput18

As a seasoned full-stack developer, my skills and experience are well-suited to address all the pain points outlined in your project, and more! Having worked on numerous projects involving Flutter, Firebase FCM, Realtime Applications, and API Integration among others, I can confidently deliver a superior solution for your chat and notification system. Particularly, I have spent significant time with Agora call connection and reconnection handling that aligns perfectly with optimizing the calling reliability you need. My problem-solving mentality paired with an agile development approach will ensure that I not only fix existing issues but also fortify your application against future hiccups. Furthermore, I am highly adept at managing large-scale realtime systems within tight deadlines while ensuring top-notch quality. My commitment to clean coding, secure systems, and optimization aligns excellently with your objective of achieving production-grade reliability for your app – something that is crucial, especially when it's live! It would be my privilege to leverage my proficiency to take your app to new heights of performance and stability sans any compromises.

@radheys40

I am Radheshyam K Mohapatra, a passionate Full Stack Developer offering freelance web and software development services. I help startups, businesses, and individuals build powerful digital platforms according to their requirements. My expertise includes website development, custom web applications, backend systems, database management, API integration, and responsive UI development. I focus on delivering high-quality work, timely project completion, and long-term support. Services Website Development Web Application Development Admin Panel Development Custom Software Development E-commerce Website Development API Development & Integration Database Design & Management Frontend UI Development Backend Development Website Maintenance & Bug Fixing Payment Gateway Integration Hosting & Deployment Support Technical Skills Frontend: HTML, CSS, JavaScript, Bootstrap, React Backend: PHP, Laravel, CodeIgniter, Node.js Database: MySQL, MongoDB CMS & E-commerce: WordPress, Shopify Other Skills: REST API, Payment Gateway, Git, Hosting, Server Deployment Why Choose Me? Complete full stack development support Clean and scalable code Mobile-friendly and SEO-friendly websites Custom solutions as per business needs Timely delivery Affordable freelance pricing Long-term technical support