Next-Gen Shopping App Development - Web and Apps

I'm seeking an experienced software development company to collaborate on creating a comprehensive shopping application, similar to Blinkit. The app should be user-friendly, scalable, and high-performing, with the following key features:

Core Features:
- Product Catalogues (including color, sizes, prices)
- Wishlist
- Order Management & Invoicing
- Multi-location Inventory/Stock Management
- User Registration & Accounts
- Secure Login, Password Reset
- Email Invoices
- Notifications via Text/WhatsApp
- Search & Filter by Brand, Category, Price
- Shopping Cart & Checkout
- Payment Gateway Integration (primarily Stripe)

Platforms Required:
- Web
- iOS
- Android

Tech Stack:
- Backend: Java, Spring, Kafka
- Databases: Postgres, MySQL, MongoDB
- Frontend/Apps: React, React Native, and/or Flutter
- CDN for Static Pages
- Caching: Redis
- CI/CD: Kubernetes, EC2, ECS, EKS, etc.
- Cloud Provider: AWS,
- Other: AWS Lambda, Any other technology needed to fulfill above requirements

Authentication Methods:
- Email and Password
- Social Media Login
- Two-Factor Authentication

Please provide a detailed quote in CAD, including features, timeline, and cost. Ideal candidates should have:
- Proven experience in building similar applications
- Strong expertise in the specified tech stack
- Excellent communication skills
- Ability to meet deadlines and work within budget constraints

Looking forward to your proposals!