Expo-Firebase App: Transaction Notification System

@asifalimzd

Hi there, I can integrate a complete real-time notification and messaging system into your Expo app using Firebase, ensuring users are instantly informed when new transactions occur. I’ll implement Firebase Cloud Functions to listen to Firestore events, trigger Expo push notifications, and integrate email services like SendGrid or Resend for reliable transaction updates. I’ll also handle direct integration with the WhatsApp Business Cloud API for template-based messaging, ensuring secure API key management, proper logging, and scalable, clean code. The entire system will be tested end-to-end for reliability and performance. Kindly send me a message to discuss more. Thanks

@corpmember29

REAL-TIME TRANSACTION ALERTS + MULTI-CHANNEL MESSAGING EXPERT HERE With 12+ years in full-stack and mobile development, we can integrate a scalable notification system into your Expo + Firebase app with clean architecture and production-ready security practices. We have experience with: • Firebase Cloud Functions & Firestore triggers • Expo Push Notifications • SendGrid / Resend email integrations • WhatsApp Business Cloud API • Secure environment & API key management • Real-time transaction/event systems Proposed workflow: • Firestore transaction created • Cloud Function validates & processes event • Trigger push notification to relevant users • Send branded email with transaction details • Send WhatsApp template message to customer/admin • Centralized logging + retry/error handling Core deliverables: • Firebase Cloud Functions setup • Expo push notification integration • Email service integration • WhatsApp Cloud API integration • Secure config handling (.env / secrets) • Scalable notification service architecture • Proper logging, testing & documentation Suggested stack: Expo + Firebase + Node.js Cloud Functions + Firestore + SendGrid/Resend + Meta WhatsApp Cloud API. We can also help structure notification queues, user preferences, delivery tracking, and future in-app messaging/chat expansion. Ready to start immediately and deliver quickly with clean maintainable code.

@ZohaibRoy

⭐⭐⭐⭐⭐ Build a Notification and Messaging System in Your Expo App ❇️ Hi My Friend, I hope you are doing well. I've reviewed your project needs and see you are looking for a developer to integrate a notification and messaging system in your Expo app. You don’t need to look any further; Zohaib is here to help you! My team has successfully completed 50+ similar projects for mobile app notifications and messaging systems. I will implement Firebase Cloud Functions to trigger notifications when new transactions occur, set up Expo Push Notifications for real-time alerts, and integrate email services for transaction details. ➡️ Why Me? I can easily do your project as I have 5 years of experience in mobile app development, specializing in Firebase integration, push notifications, and messaging systems. My expertise includes working with Expo, Firestore, and API integrations. ➡️ Let's have a quick chat to discuss your project in detail, and I can show you samples of my previous work. Looking forward to discussing this with you in our chat. ➡️ Skills & Experience: ✅ Firebase Cloud Functions ✅ Expo Push Notifications ✅ Firestore Integration ✅ WhatsApp Business API ✅ SendGrid Integration ✅ Real-time Messaging ✅ API Development ✅ Clean Code Practices ✅ Scalable Architecture ✅ Logging and Monitoring ✅ Mobile App Development ✅ Problem Solving Waiting for your response! Best Regards, Zohaib

@espsofttech

Hi there, As you already have a Firebase-based Expo app with Firestore transactions in place, I can integrate a complete real-time notification and messaging pipeline on top of your existing setup without disrupting current flows. I will set up Firebase Cloud Functions to trigger on new transaction creation and connect them with Expo Push Notifications, email services (SendGrid/Resend), and WhatsApp Business Cloud API so all alerts are sent automatically in real time with proper logging and secure API handling. I would request to connect once so I can quickly align on your current structure and start implementing this cleanly. Thanks, Rahul A.

@GintarasZelvys

Hi, I can build your complete Firebase transaction-triggered notification system in Expo, including Push, Email, and WhatsApp delivery, with production-ready reliability and security. I have 8+ years of mobile and backend development experience, with strong expertise in Expo and Firebase. I can implement Cloud Functions to trigger on new Firestore transactions, send real-time Expo push notifications to relevant users, integrate SendGrid or Resend for transaction emails, and connect WhatsApp Business Cloud API for template-based customer and owner messaging. I will deliver clean, scalable code with secure API key handling, structured logging, retry/error handling, and clear architecture for long-term maintenance. I can start immediately and provide fast, high-quality delivery with clear communication throughout the project. Thank you.

@Herculesz

Hi I can integrate a complete transaction-based notification and messaging system in your Expo app using Firebase as the backend. The main technical challenge is making sure one Firestore transaction event reliably triggers the correct push notification, email, and WhatsApp template message without duplicate sends, missed alerts, or exposed API keys. I can implement Firebase Cloud Functions, Firestore triggers, Expo Push Notifications, SendGrid or Resend email delivery, and direct WhatsApp Business Cloud API integration. I can also structure the logic so customers, owners, or internal users receive the right message based on transaction type, user role, and notification rules. The system will include secure environment variable handling, logging, error handling, retry-safe logic, and clean scalable code for future notification types. I can make sure the implementation is well organized and easy to maintain inside your existing Expo/Firebase setup. Thanks, Hercules

@extreamcode

Hello, I’ve read your Expo-Firebase project and I’m confident I can deliver a robust, scalable notification system that triggers on new transactions. With 15+ years in full-stack and mobile development, I’ve built similar real-time alert pipelines using Firebase Cloud Functions, Expo Push Notifications, and secure API-driven integrations. I will implement: (1) a Firestore-triggered Cloud Function to fire on new transactions, (2) Expo push alerts mapped to the relevant users, (3) an email workflow via SendGrid or Resend with full transaction details, and (4) WhatsApp Business Cloud API templates for customer and owner notifications. I’ll ensure clean, modular code with proper environment separation, key management, and end-to-end logging for observability. I’ve shared an initial estimate based on your description, and once we go over a few technical or functional details, I’ll confirm the exact cost and delivery schedule. The plan includes a staged rollout: function development + verification in a staging Firestore, followed by a security review and performance tune. 1) Do you already have a specific transaction data model in Firestore I should align to, and which fields must be included in the push/email/WhatsApp messages? 2) Which SendGrid/Resend account preferred and do you have template IDs ready for WhatsApp templates? 3) Any regional compliance or rate-limit concerns I should account for during sending? Best regards, Asad

@mrresearcher99

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

@taimoorkhan311

Hello, With over 4 years of experience in React Native, Mobile App Development, API Integration, and iOS Development, I am well-equipped to handle your Expo-Firebase project. I understand your requirement for a comprehensive notification system triggered by new transactions, and I am confident in delivering a professional solution as per the project description. I have carefully reviewed the project requirements and believe that my expertise in Mobile App Development, Android, Software Architecture, iOS Development, React Native, API Integration, SendGrid, and Expo aligns perfectly with what you need. Let's discuss further details in the chat to ensure a successful collaboration. Best regards, Taimoor from Pixels Soft Let's connect in chat for further discussion.

@einnovention

Asif from Einnovention, at your service! With over a decade of experience and 248 successful projects under our belt, we're incredibly well-equipped to undertake your Expo-Firebase app. Our team's collective knowledge in API Integration, Mobile App Development, and Software Architecture perfectly align with the scope of work that you require for this project. The uniqueness of our services lies not only in our technical proficiency but also in our commitment to long-term partnership. We offer unlimited revisions until you're fully satisfied with the project, and free support for more than two weeks after delivery. Additionally, we maintain transparent communication throughout the project journey, ensuring clear milestones and reliable delivery. Moreover, in-line with your requirement for a clean and scalable codebase, rest assured that we prioritize best-practices to guarantee robustness and flexibility both now and as your app inevitably grows in time. So why wait? Let's discuss the specifics of your app today and transform your vision into a working solution that will be delivered on time, on budget, and beyond expectations.

@rbtech1984

Hi There!!! ★★★★ ( Expo Firebase transaction notification system with multi channel alerts ) ★★★★ Project understanding: I understand you need a complete notification system for your Expo app where Firebase triggers run on new transactions. It should send real time push notifications, email alerts and WhatsApp messages using proper APIs with scalable and secure implementation. ⚜ Firebase Cloud Functions for transaction triggers ⚜ Expo push notifications real time setup ⚜ SendGrid/Resend email integration ⚜ WhatsApp Business Cloud API messaging ⚜ Secure API key handling & environment config ⚜ Logging & error handling system ⚜ Clean scalable backend architecture I am Farhin B, mobile app developer with experience in Firebase, React Native and API integrations. I have worked on notification driven systems where real time sync and reliability is important. I will use Firebase Functions for event triggers, Expo for push alerts, and integrate WhatsApp + email services with proper queue handling to avoid failure and delays. Let’s connect and discuss your current setup, I can implement this quickly and cleanly. Warm Regards, Farhin B.

@GeeksEra

With over 8 years of experience in mobile app development, my team and I have built a solid foundation in using React Native and integrating Firebase for apps. We fully grasp how the Expo platform functions which complements your project needs. Our and your clients' satisfaction prove that we can deliver advanced and expert solutions that are both comprehensive and concise. Additionally, our expertise extends to incorporating real-time features like the SMS gateway for transaction details along with email notifications. Utilizing platforms such as SendGrid or Resend API, we can ensure your users receive the required notifications seamlessly. We have past experience integrating similar services that aligns appropriately with your project agenda, so you can rest assured that we claim no unauthorized action towards your client's data access. Lastly, I want to stress on our commitment to producing clean, scalable codes. We give utmost importance to logging which ensures the smooth upkeep of the project at every stage. Interface-wise, be prepared for a sleek and completely user-friendly design across all platforms which you rightly aim for. In short, consider us as developers who not only deliver but also understand your vision and requirements - a valued asset that translates into projects designed and developed to meet every single demand!

@DeveloperStation

Hi there, We’ve built several apps with Expo and integrated Firebase Cloud Functions for features like push notifications and email alerts. We also have extensive experience with WhatsApp Business API, having developed a complete solution for a client that sent over 100,000 messages. For your project, we can implement a robust server-side solution that handles all notifications—push, email, and WhatsApp—using a single backend. This approach ensures that we can easily add new notification channels in the future without duplicating effort. Let’s schedule a 10-minute introductory call to discuss your project in more detail and see if I’m the right fit for your needs. I’m eager to learn more about your exciting project. Best, Adil

@ahmedaaalnaasan

We are a professional full-stack team with over 10 years of experience building scalable mobile and backend systems, including real-time notification architectures using Firebase and modern APIs. For your Expo app, we will implement a robust end-to-end notification system: Firebase Cloud Functions to trigger instantly on new transactions, Expo Push Notifications for real-time in-app alerts, and seamless email integration using SendGrid or Resend. We will also integrate the WhatsApp Business Cloud API for reliable, template-based messaging to both customers and admins. Our focus is on clean, secure, and scalable architecture—ensuring proper API key management, structured logging, and efficient performance under growth. We design systems that are production-ready, easy to maintain, and optimized for real-world usage. Beyond development, our team also brings expertise in UI/UX, system optimization, and cross-platform solutions. We are fluent in both Arabic and English, ensuring clear and smooth communication. Ready to deliver a reliable, high-performance messaging system tailored to your app.

@codefusion53

Hi I can implement a complete, real time notification and messaging system for your Expo app using Firebase and scalable backend practices. I will set up Cloud Functions to trigger on new transactions in Firestore and instantly send push notifications via Expo to the right users with precise targeting. In addition, I will integrate email delivery using SendGrid or Resend and connect WhatsApp Business Cloud API for reliable template based messaging. Each channel will be structured to ensure consistency, fast delivery, and clear communication of transaction details. The system will be built with clean and maintainable code, secure API key handling, and proper logging to track events and troubleshoot issues بسهولة. I will ensure the architecture is scalable as your app grows and transaction volume increases. You will receive a fully working, end to end notification system ready for production use. Best, Justin

@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

@temoberishvili

Hello! I’ve carefully read your project description regarding the integration of a notification and messaging system in your Expo app. With over 10 years of experience in mobile app development and expertise in React Native, I’m confident I can deliver a robust solution that meets your project goals. To ensure I fully grasp your requirements, could you please clarify the following questions? 1. What specific types of notifications are you looking to implement (e.g., push notifications, in-app messages)? 2. Are there any particular third-party services you prefer for API integration, or is SendGrid your primary choice? I have previously developed similar applications, including a task management app that featured real-time notifications, a fitness tracking app with messaging capabilities, and a local events app that utilized push notifications for user engagement. Each of these projects successfully enhanced user interaction and satisfaction. I’m eager to collaborate with you on this project and ensure your app stands out with a seamless notification system. Let’s chat more about your vision and how I can contribute to making it a reality! Best regards!

@toriquldev123

Hello Dear! Greetings from Toriqul Global Solutions! We are a reliable and experienced web design & development company led by Engineer Toriqul Islam (B.Sc. in CSE, RUET), with over 10 years of proven industry experience delivering quality digital solutions. At Toriqul Global Solutions, we build modern, user-friendly, high-performance websites focused on simplicity, elegance, and functionality to boost engagement and business growth. I have some questions——— 1. Expo managed workflow or bare React Native? 2. WhatsApp Business API already approved by Meta? Technologies We Use: Custom Websites Development Using ======>Full Stack Development. 1. HTML5 2. CSS3 3. Bootstrap 4. jQuery 5. JavaScript 6. AngularJS 7. React JS 8. Node.js 9. WordPress 10. PHP 11. Ruby on Rails 12. MYSQL 13. Laravel 14. .NET 15. CodeIgniter 16. React Native 17. SQL / MySQL 18. Mobile app development 19. Python 20. MongoDB and more skills What will you get? • Responsive design on All Devices •Reusable components •Clean code •Timely delivery tested •Clear communication We would be honored to discuss your project requirements and help bring your ideas to life. Thank you for your time and consideration. Warm Regards, Toriqul Global Solutions

@BarryCrouch

Are your transactions created directly in Firestore, or through a backend/API layer? Should email send for every new transaction, or only for specific transaction types/statuses? I focus on building systems that are reliable, easy to maintain, and ready to extend later, so this can become a reusable notification foundation for future features too.