Android App Development & API Integration (Video + OTP + Security)

Android App Development & API Integration (Video + OTP + Security)
We are looking for an experienced mobile app developer/team to work on our app SpakSpak.

Current Status:
Android app already developed
Backend partially ready
Need improvements, integrations, and optimizations
Scope of Work:
API Integration
Video upload, compression & streaming optimization
Phone number verification (OTP based login)
Basic fraud detection / bot protection (if required)
Performance Optimization
App speed improvement
Reduce lag in video loading
Security Enhancements
Prevent fake accounts / bots
Secure API handling
Code Management
Proper documentation
Clean and scalable code
Important Requirements:
Developer must clearly specify:
Which APIs/tools will be used (with official links)
Free vs Paid services
Monthly or usage-based costs (if any)
All accounts (API, hosting, etc.) must be created under our ownership/email
Full source code ownership must be transferred
Budget:

Open for discussion (fixed or milestone-based
Preference:
Experience in video-based apps (like reels/short video apps)
Experience with Firebase / AWS / Cloudflare
Clear communication & transparency