> For the complete documentation index, see [llms.txt](https://docs-whitepaper.gitbook.io/nexfi-wallet/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs-whitepaper.gitbook.io/nexfi-wallet/4.-solution-overview.md).

# 4. Solution Overview

#### 4.1 NexFi Platform Architecture

A hybrid stack combining:

* **Frontend**: React Native app, web dashboard
* **Backend**: Microservices in Node.js & Go
* **Custody**: Fireblocks for crypto, banking partners for fiat
* **Ledger**: Postgres + append-only on-chain proofs

#### 4.2 Multi-Currency Wallet & Smart Card

Users open multi-currency accounts in 35+ fiat currencies, equip virtual cards immediately, and order physical cards—spending at live FX rates with no hidden spread.

#### 4.3 Instant P2P Transfers

On-chain or in-ledger transfers between NexFi wallets settle in under one second, at zero cost, allowing family, friends, and colleagues to move money seamlessly.

#### 4.4 Token-Powered Benefits

NEXFI token acts as:

* **Fee Medium**: pay transfer & card fees at 50% discount
* **Staking Asset**: lock tokens for up to 12% APY rewards
* **Governance Key**: propose & vote on product improvements