Bitcoin Wallet App Build

I want a clean, lightweight mobile wallet dedicated to Bitcoin only. The core job is to design and code an app that lets users create or import a BTC address, view their balance, send and receive coins, and track recent transactions in real time through reliable blockchain APIs.

Security is non-negotiable. The first release must include two-factor authentication on every outbound transaction as well as on any sensitive settings screen. I’m happy to discuss SMS, email, or authenticator-app–based 2FA—choose whichever you can implement most robustly.

I’m aiming for a straightforward user experience with optional room to grow: even though the initial scope covers Bitcoin exclusively, the architecture should be modular enough that I can add Ethereum, Litecoin, or other chains later without a full rewrite.

Deliverables
• Fully functional Android and iOS apps (React Native, Flutter, or native—open to your recommendation).
• Secure backend or trusted third-party API integration for balance and UTXO handling.
• Source code pushed to a private repo with clear build instructions.
• Brief documentation outlining the 2FA flow and where additional coins could plug in.

If you’ve shipped crypto wallets before and can point to code or live apps, let’s talk timelines and milestones.