Firebase Auth & Cloud Functions - 13/06/2026 08:19 EDT

@ashinnd84

Hello there, we are a team of senior Full Stack developers and we can do this project in no time. Thanks Ashish Kumar.

@mehboobkatiyar

Hello, I can set up your Firebase backend, including Authentication with Captcha, role-based access (Moderator/Admin/User ready), Firestore security rules, Cloud Functions, FCM notifications, and optimized Firestore structure for bookings, chat, and availability. With experience in Firebase, Cloud Functions, and real-time applications, I'll deliver a secure, scalable solution that works seamlessly in both local emulators and production environments. I can start immediately and look forward to discussing the project. Thanks.

@FreeLancers360

As a seasoned developer with extensive experience in utilizing the Firebase stack, I can effectively and efficiently handle all the backend functionalities that your project requires. I specialize in API development, JavaScript, and web development which directly aligns with your project needs. My team of three professionals has successfully built and deployed various websites incorporating both front-end and back-end technologies like HTML, CSS, JavaScript, Node.js, React.js, PHP, and Laravel. Regarding authentication and roles, I have previously integrated role-based access control into Firebase projects while ensuring flexibility for future modifications. To enforce role logic cleanly, my team is well-versed in writing Firestore Security Rules to accommodate your custom needs. Additionally, we can design robust collections, indexes, and rules in Cloud Firestore to ensure efficient querying and real-time updates for bookings, chat threads, and user availability data.

@RajAbhisek

Read the spec — Firebase Auth + Captcha, role-based Firestore rules with a Moderator role, Cloud Functions for booking/notification flows, and FCM push. We have shipped two role-based Firebase backends (one for an EdTech booking platform, one for a hyperlocal services app), so Firestore security rules and per-user FCM token cleanup are familiar territory. For Captcha, App Check with reCAPTCHA Enterprise on web + Play Integrity on Android is what I would use. Rules will follow a role claim baked into the auth token so adding Admin/User later is a one-line change. Will hand you a project that boots via firebase emulators:start, a single deploy command, and a Moderator vs non-Moderator test pass. Ping me if you want to discuss collections design before we start. — Raj

@rakhshanz3

As an accomplished technology professional and AI specialist with over two decades of experience, I assure you that your Firebase authentication and cloud function requirements are well within my skill set. My comprehensive background ranges from academic research to problem-solving in real-world software engineering challenges. I have hands-on expertise in handling and optimizing large-scale software systems like Firestore and Cloud Functions, pivotal elements in your project. Having served as the CTO of an AI-driven startup, I built complex, scalable systems using a role-based architecture akin to the one you envisage. This involved deep engagement with Firebase's security rules, creating custom roles, enforcing role logic, and implementing captcha checks for user registration. My proficiency extends to Firestore setup, designing collections and indexes that facilitate real-time updates for bookings and chat messages while carefully scoping threads and queries to ensure efficient availability calendar management. Naturally attuned to ensuring a seamless experience, I understand the value of foolproof deployment & testing procedures. I can guarantee not just the smooth running of your production environment but also providing testing capabilities through emulators.

@gauravl3

This version is well under 1500 characters: Hello, I have hands-on experience building Firebase-first applications with Authentication, Firestore, Cloud Functions, FCM, and Security Rules. I can implement Firebase Authentication with CAPTCHA protection, create a scalable role-based access system using Custom Claims (Moderator, Admin, User), and write secure Firestore Rules that are easy to maintain and extend. For Firestore, I'll design optimized collections, indexes, and access rules for bookings, chat threads, and availability, ensuring real-time updates and efficient queries. I'll develop Cloud Functions (Node.js) for booking workflows, calendar events, reminders, notifications, and scheduled tasks using Cloud Scheduler. FCM integration will include device/web push notifications, token management, and automatic cleanup of invalid tokens. In previous projects, I've handled RBAC through Custom Claims + Security Rules and secured signups using reCAPTCHA and Firebase App Check. I also use the Firebase Emulator Suite extensively to validate security rules and backend workflows before deployment. I'll ensure: ✓ Local development works via `firebase emulators:start` ✓ One-command deployment for new environments ✓ Role-based permissions are fully tested ✓ Booking events trigger Functions and notifications correctly I'm available to start immediately and would be happy to discuss the architecture in detail. Best regards, Gaurav Lalwani

@guptakishan805

As a seasoned Full Stack Developer with over 5 years of experience, I have a comprehensive understanding and practical knowledge of the Firebase stack. I have successfully architected numerous projects using Firebase, including role-based applications with extensive security rules and Captcha components for new user onboarding. A good example is when I recently designed a similar app to yours for a vacation rental company, where the roles applied in order to target different tasks had to be scalable as just adding on without worrying about rewriting rules. With that said, I am more than capable of delivering optimally in this project as well. In regards to your needs around Realtime Data and Business Logic, I have deep proficiency in designing Cloud Firestore collections, indexes, and enforce clean rules ensuring that all database operations are carried out in real-time whilst providing efficient querying capabilities. Additionally, my advantage of having strong grasp on technologies like Node.js will make me highly effective in creating the necessary background functions such as the timely scheduling tasks, calendar event creator etc.

@jaroslavcaprata

Hi, there. I have 6+ years of experience building Firebase-based applications using Authentication, Firestore, Cloud Functions, FCM, and Security Rules. I have delivered 15+ production systems with role-based access control, real-time messaging, booking workflows, notification services, and emulator-driven deployment pipelines. For your project, I will configure Firebase Authentication with CAPTCHA protection, implement scalable custom claims for Moderator/Admin/User roles, and create secure Firestore rules around bookings, chats, and availability data. The database structure, indexes, and queries will be optimized for real-time updates, performance, and future expansion. I will build Cloud Functions for booking automation, reminders, notifications, scheduled tasks, and FCM token management while ensuring full compatibility between local emulators and production deployments. My focus is on security, maintainability, and clean architecture, with thorough testing to verify role permissions, function triggers, and notification delivery. Thanks.

@Hrolgar

Firebase Admin SDK sets custom claims synchronously, but the client JWT stays stale until the next refresh, up to an hour out. For role-gated Functions you need a getIdToken(true) force-refresh client-side right after claim assignment, otherwise your endpoints see the old token on first call. For this build: email/Google auth (or whatever providers you need), custom claims set via Admin SDK in a dedicated callable, Firestore security rules that mirror those claims exactly, and idempotent HTTPS and callable endpoints with proper retry handling so background triggers don't double-write. One milestone, 3 days, 32,000 INR: working auth flow, role enforcement enforced both client and server-side, a clean Firestore data model with collections scoped correctly, and endpoints tested against the Admin SDK test harness. What auth providers do you need, and is there an existing data model to work around or a clean start?

@GobindSawarn

With over five years of experience as a developer, my main goal is to turn your brilliant idea into a robust and efficient solution. I have a proven track record of creating reliable applications using the Firebase stack, and your project aligns perfectly with my expertise. I understand the significance of smooth user onboarding, including security measures such as Captcha screening. My previous projects have involved implementing role-based access control for apps with multiple user profiles like Admin, Moderator, and User roles, and I have always ensured scalability for future adaptations. Using Firestore Security Rules to enforce these different roles has been part of my standard practice. Additionally, I am well-versed in setting up real-time data architecture in Cloud Firestore to provide optimal efficiency for database operations like booking updates, chat threads scoping, and availability calendar management. Coupled with my proficiency in Node.js and Cloud Functions, I can design and implement seamless server-side logic as desired in your brief. My experiences extend to performant push notification setups using Firebase Cloud Messaging—setting up tokens per user and ensuring their smooth maintenance is something I have mastered. My aim for this project is for you to confidently run `firebase emulators:start`, knowing that all services .

@hugog17

⭐Hi there ! Let's set interview schedule for ur project if you want. Your Firebase backend needs secure RBAC, clean Firestore data modeling, and Cloud Functions that behave exactly the same in emulator and production. I’ve built Firebase workflows covering Auth, custom claims, Firestore Rules, FCM, scheduled functions, and real-time booking or chat updates. My approach keeps roles extensible, so Moderator, Admin, and User permissions can be added without rewriting the whole ruleset. Captcha will be enforced during signup using Firebase App Check or reCAPTCHA, while privileged role assignment stays server-side only. I’ll design scoped chat threads, indexed availability queries, idempotent booking triggers, token cleanup, and proper retry handling, so no duplicate notifications or random prod-only bugs, tbh. You’ll also get emulator tests, rule tests, deployment config, and a one-command setup that’s clean af for future devs. Timeline : 18 days Budget : ₹32000 Are calendar events going into Google Calendar, an in-app calendar, or both?

@sgwtechnology

Hello, I have strong experience building production-grade Firebase backends using Authentication, Firestore, Cloud Functions, and FCM with secure role-based architectures. I can design a scalable RBAC system (User/Moderator/Admin-ready) using custom claims + Firestore Security Rules to ensure strict access control without future rewrites. I will set up Captcha-protected Firebase Auth flow, structured Firestore collections for bookings/chat/availability, optimized indexes, and real-time data syncing between users. Cloud Functions (Node.js) will handle booking workflows, reminders, notifications, and scheduled cleanup via Cloud Scheduler. Push notifications will be fully integrated with FCM, including token lifecycle management and automatic invalidation. Deliverables include emulator-ready setup, production deployment parity, tested security rules, and documented architecture. Ready to start immediately.

@serviceaxisgroup

Hi, I can help with a complete Firebase backend that enforces Captcha-gated signups, role-based access (including Moderator), and secure real-time Firestore for bookings, chat, and availability. I’ll start by mapping your Firestore collections, Cloud Functions, and FCM flows, then implement Security Rules and custom role claims with testable patterns. I’ll reduce risk using Firebase emulators (auth/rules/functions), thorough rule tests for Moderator vs non-moderator, and a one-command deploy that mirrors emulator behavior. Do you already have a preferred schema for bookings/chat/availability documents? Also, where should the Captcha validation run (client or Cloud Functions) for creation—either way is fine. Great—if you answer, I’ll outline the first implementation steps and timeline.

@Huzaifa366

Hello, I’m interested in helping you build the Firebase backend for your product. My background includes backend development, authentication systems, role-based authorization, real-time applications, APIs, databases, and cloud-based architectures. I am comfortable working with Firebase Authentication, Cloud Firestore, Cloud Functions, Firebase Cloud Messaging, Security Rules, and local emulator workflows. For role management, I would implement Firebase Custom Claims to support Moderator, Admin, and future roles without requiring major rule changes. Security Rules would be structured around role-based access patterns to keep authorization maintainable and secure. For the real-time layer, I can design Firestore collections, indexes, and query patterns optimized for bookings, chat threads, and availability calendars while ensuring efficient reads and proper access control. The Cloud Functions layer would handle booking workflows, reminders, notifications, scheduled tasks, and FCM integration, with automatic cleanup of invalid device tokens. I understand the importance of emulator parity and reproducible deployments, so the solution will be fully testable using `firebase emulators:start` and deployable through a documented deployment process. I am available to start immediately and would be happy to discuss your current architecture and requirements. Best Regards, Muhammad Huzaifa

@engmanirul261

Hi, I’m a Senior Full Stack Developer(12 Years Experience) with strong experience building scalable mobile and backend systems using React Native, Node.js express api,Firebase, Filestorage, and modern API-driven architectures. I’ve worked on end-to-end application development — from React Native frontend development to backend APIs, cloud deployment, third-party integrations, payment systems, authentication flows, and real-time features. My expertise includes: • React JS, React Native (cross-platform iOS & Android apps)
• Node.js / Express backend architecture
• REST APIs & GraphQL integrations
• Firebase, AWS, Supabase, MongoDB, PostgreSQL
• Stripe, PayPal, Twilio, OAuth, and third-party API integrations
• WebSockets / real-time systems
• Performance optimization & scalable architecture
• CI/CD deployment pipelines and production releases I’m comfortable taking ownership of the complete technical flow: * Designing scalable backend systems * Building high-performance mobile apps * Integrating external platforms and cloud services * Optimizing app performance and API reliability * Managing deployment and production infrastructure I focus on writing clean, maintainable code and delivering reliable products that scale well in production environments. I’d be happy to discuss your project requirements, architecture goals, and how I can help lead development effectively. Looking forward to hearing from you. Best regards Eng Manirul Islam

@birspetech

As an experienced IT professional and the founder of Bispe Tech, I believe I am the ideal choice to build your Firebase-based backend. While my primary specialization lies in AngularJS, API Development, Backend Development, Node.js, NoSQL Couch & Mongo, Software Development, it is important to note that I have a comprehensive skill set and can adapt quickly to any new tech stack. With many completed projects in setting up PHP-based backend systems and designing secure and scalable software solutions, my skills directly align with your project needs. Additionally, my experience in eCommerce development makes me well-versed in handling complex user roles and permission-based systems - a crucial aspect of your project. In conclusion, I bring not only the technical know-how but also the creativity and adaptability required for this project. I am ready to commence work immediately and ensure timely and successful delivery surpassing your expectations. I guarantee a smoothly functioning backend designed specifically for your requirements. Let's collaborate to bring your product on Firebase to life!

@EmanLuqman

With extensive experience in web development, our team is well-equipped to handle your specific requirements for your Firebase-driven project. We are comfortable working with Firebase Authentication and have readily implemented Captcha checks for new user accounts in our previous projects. Additionally, we have successfully set up role-based access control systems with flexibility built-in, just as you require with the ability to add Admin or basic User roles later without rewriting rules. Regarding Realtime Data, we have hands-on experience designing structured collections and indexes in Firestore that enable efficient querying and ensure real-time data updates for multiple parties. Chat threads and user availability will be appropriately scoped and programmatically tailored, maximizing your application's performance. On top of this, we are adept at leveraging Cloud Functions (Node.js) for your server-side logic. Our expertise includes implementing background functions for task automations like creating calendar events, reminders on booking confirmation, sending notifications on status changes or incoming chat messages, and running scheduled cleanup tasks using Cloud Scheduler when necessary. Please rest assured that if you choose us for this project, we will work diligently until all acceptance criteria are fully met and your project runs smoothly both locally and in production. Join our list of satisfied clients by letting us tackle your Firebase project today!

@huzaifa1332

Hi, Your Firebase backend requirements are clear, and I can build this end-to-end with secure, scalable architecture. I’ll set up Firebase Auth with Captcha verification, flexible role-based access (Moderator/Admin/User), Firestore security rules, optimized collections/indexes for bookings, chats, and availability, plus Cloud Functions for booking workflows, notifications, and scheduled tasks. I’ll also integrate Firebase Cloud Messaging with automatic token cleanup and ensure everything runs perfectly in Emulator Suite and production with one-command deployment. Security, scalability, and maintainability will be my main focus. If my work doesn’t meet your expectations, you don’t pay — I deliver results first.

@Geetam00

With my extensive background in full-stack development, specializing in scalable and efficient solutions, I'm confident that I'm the right person to lead your Firebase project. Having already managed diverse digital platforms, I understand the intrinsic value of a well-designed, robust backend system - and that's exactly what I can bring to your product. My skillset includes advanced knowledge of JavaScript and Node.js, specifically relevant to your needs here. Migrating between frontend and backend isn't just a task for me; it's my expertise. Whether it is configuring Firebase Authentication with a Captcha check, introducing role-based access control, writing efficient Firestore Security Rules, or designing collections/indexes/rules for bookings, chat messages and user availability on Cloud Firestore, you can count on quality delivery. What sets me apart is not just my technical proficiency but also my attitude towards results. I'll consider the job complete only when you're able to successfully run firebase emulators locally with all services working seamlessly as expected. Furthermore, managing user roles effectively is crucial to ensure pending data requests don't end up in the wrong hands.