Firebase Developer Needed for Backend Services and Real-time Features

We're looking for an experienced Firebase Developer to implement comprehensive backend solutions using Firebase services for authentication, database, storage, and serverless functions.

Key Responsibilities:

• Set up Firebase project and configuration

• Implement Firebase Authentication

• Design and implement Firestore database structure

• Develop Cloud Functions for serverless backend logic

• Set up Firebase Storage for file uploads

• Implement push notifications with FCM

• Configure Firebase Security Rules

• Set up Firebase Hosting for web apps

• Integrate Firebase Analytics

• Implement real-time data synchronization

• Optimize Firebase queries and indexes

• Handle data migration and backups

• Monitor Firebase usage and costs

Required Skills:

• 3+ years of Firebase development experience

• Strong JavaScript/TypeScript knowledge

• Firestore data modeling and queries

• Cloud Functions development (Node.js)

• Firebase Authentication methods

• Security Rules configuration

• Real-time database experience

• Mobile and web app integration

• NoSQL database concepts

• Scalability and performance optimization

Firebase Services:

Firebase Authentication:

• Email/password authentication

• Social authentication (Google, Facebook, Twitter, Apple)

• Phone number authentication (SMS)

• Anonymous authentication

• Custom authentication

• Multi-factor authentication (MFA)

• Email verification

• Password reset flows

• User management

• Session management

Cloud Firestore:

• Document-based NoSQL database

• Real-time data synchronization

• Offline data persistence

• Collections and documents structure

• Queries and filtering

• Compound queries

• Pagination (limit, startAfter)

• Transactions and batch writes

• Subcollections and references

• Data validation

Cloud Functions:

• HTTP triggers (REST APIs)

• Firestore triggers (onCreate, onUpdate, onDelete)

• Authentication triggers

• Storage triggers

• Pub/Sub triggers

• Scheduled functions (Cron jobs)

• Background tasks

• Third-party API integration

• Email sending (SendGrid, Mailgun)

• Payment processing

Firebase Storage:

• File upload and download

• Image and video storage

• User-generated content

• File metadata management

• Signed URLs for secure access

• Storage Security Rules

• File size limits

• Multiple file uploads

• Resume interrupted uploads

Firebase Cloud Messaging (FCM):

• Push notifications (iOS, Android, Web)

• Notification messages

• Data messages

• Topic-based messaging

• Device group messaging

• Notification scheduling

• Deep linking from notifications

• Custom notification sounds

• Rich notifications

Firebase Realtime Database:

• JSON tree structure

• Real-time synchronization

• Offline capabilities

• Data security rules

• Data indexing

• Query and filtering

• Transactions

• Presence system (online/offline status)

Firebase Hosting:

• Static website hosting

• SPA (Single Page Application) support

• SSL certificates (automatic)

• Custom domain setup

• Rollback to previous versions

• Preview channels for testing

• CDN distribution

• Rewrite rules

Firebase Analytics:

• User behavior tracking

• Event tracking

• User properties

• Audience segmentation

• Conversion tracking

• Custom events

• Automated insights

• Integration with Google Analytics

Additional Firebase Services:

• Firebase Performance Monitoring: Track app performance

• Firebase Crashlytics: Crash reporting

• Firebase Remote Config: Feature flags and A/B testing

• Firebase App Distribution: Beta testing

• Firebase Test Lab: Automated testing on real devices

• Firebase Dynamic Links: Deep linking

• Firebase In-App Messaging: Contextual messages

• Firebase ML: Machine learning features

Firestore Data Modeling:

• Collection and document structure design

• Denormalization strategies

• Data duplication for read optimization

• Subcollection vs. root collection decisions

• Reference fields vs. embedded data

• Indexing for query performance

• Data aggregation patterns

• Scalability considerations

Security Rules:

• Firestore Security Rules

• Storage Security Rules

• Realtime Database Rules

• Role-based access control

• Data validation rules

• Custom claims for authorization

• Testing security rules

• Common security patterns

Cloud Functions Patterns:

• User creation triggers (welcome emails)

• Data sanitization and validation

• Aggregation and counting

• Thumbnail generation for images

• Notification sending

• Scheduled cleanup tasks

• Payment webhooks

• Data backup and export

• Third-party API calls

Real-time Features:

• Live chat and messaging

• Real-time notifications

• Collaborative editing

• Live presence indicators

• Real-time dashboards

• Activity feeds

• Live scoring/leaderboards

• Real-time updates

Optimization Techniques:

• Query optimization

• Index creation

• Data caching strategies

• Pagination implementation

• Batch operations

• Reduce read/write costs

• Connection management

• Offline persistence configuration

Data Management:

• Data import and export

• Database migrations

• Data backup strategies

• Data archiving

• Bulk operations

• Data cleanup scripts

• Testing with emulators

Firebase Emulators:

• Local development environment

• Firestore Emulator

• Authentication Emulator

• Functions Emulator

• Storage Emulator

• Testing without production costs

Integration Examples:

• React/React Native apps

• Flutter applications

• Angular applications

• Vue.js applications

• Native iOS (Swift)

• Native Android (Kotlin)

• Node.js backend services

Cost Optimization:

• Monitor Firebase usage

• Optimize query patterns

• Implement caching

• Reduce document reads

• Efficient data structure

• Use Cloud Functions wisely

• Archive old data

• Set up budget alerts

Error Handling:

• Retry logic for failed operations

• Offline error handling

• User-friendly error messages

• Logging and monitoring

• Error reporting to Crashlytics

• Graceful degradation

Testing:

• Unit tests for Cloud Functions

• Integration tests

• Security Rules testing

• Emulator testing

• Load testing

• User acceptance testing

Deliverables:

• Complete Firebase project setup

• Authentication system implemented

• Firestore database structure

• Cloud Functions deployed

• Security Rules configured

• Storage setup for files

• Push notifications working

• Analytics integration

• Firebase configuration files

• Documentation for Firebase structure

• Admin functions (if needed)

• Data migration scripts (if needed)

• Testing and QA complete

• Post-launch support (2 weeks)

Budget: $35 - $70/hour or $4,000 - $12,000 (Fixed project)

Timeline: 4-10 weeks (depending on complexity)