Add Bitcoin wallet development overview documentation page

content/get-started/learning-to-code/bitcoin-wallet-development-overview.md

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+---
+title: Bitcoin wallet development overview
+shortTitle: Bitcoin wallet development
+intro: "Build secure Bitcoin wallet applications by applying key management, network access, transaction handling, and security practices."
+versions:
+  fpt: '*'
+category:
+  - Learn to code
+---
+
+## Overview
+
+A Bitcoin wallet developer builds and maintains applications that store keys, track unspent outputs, create transactions, and broadcast them to the network. The role combines cryptography, backend integration, and product development to deliver secure wallet experiences on web and mobile platforms.
+
+## Core development components
+
+The work typically centers on five areas:
+
+* Key management for deterministic wallet creation and recovery
+* Network interaction for reading chain data and broadcasting transactions
+* Transaction construction for UTXO selection, fee handling, and signing
+* Security controls for protecting keys and sensitive operations
+* Application architecture and user experience across target platforms
+
+## Key management (BIP32, BIP39, BIP44)
+
+Wallets commonly implement hierarchical deterministic standards:
+
+* **BIP39** for mnemonic seed phrase generation and recovery
+* **BIP32** for deterministic key derivation from a master seed
+* **BIP44** for account and address path conventions
+
+Together, these standards let one seed securely generate many addresses while keeping backup and restore workflows manageable.
+
+## Network interaction (full nodes, SPV/Electrum, blockchain APIs)
+
+Bitcoin wallets can connect to the network in different ways:
+
+* **Full nodes** provide maximal control and verification
+* **SPV or Electrum-style clients** reduce local resource usage
+* **Blockchain APIs** (for example, Tatum or block explorers) simplify integration for balance lookups, history, and broadcast
+
+Developers choose an approach based on privacy, trust, latency, and operational cost requirements.
+
+## Transaction construction (UTXO selection, fee estimation, signing)
+
+Transaction logic includes:
+
+* Selecting UTXOs that satisfy payment and change outputs
+* Estimating fees based on transaction size and current congestion
+* Building and signing raw transactions with the correct private keys
+
+Correctness in this layer is critical because malformed transactions can fail propagation or create unnecessary fee overhead.
+
+## Security layer (device encryption, multisig, hardware wallets)
+
+Security-sensitive wallet implementations typically include:
+
+* Local device encryption for key material at rest
+* Multisignature policies for shared custody and risk reduction
+* Hardware wallet integration for isolated key signing
+
+A strong security layer limits key exposure and reduces the impact of client-side compromise.
+
+## Essential tools & tech stack
+
+Common technologies for Bitcoin wallet development include:
+
+* **Libraries:** `bitcoinjs-lib`, `bitcoinlib`, `libbitcoin`
+* **Frameworks:** React, React Native, Flutter, Swift, Kotlin
+* **Infrastructure:** Bitcoin Core for self-hosted node operations, or managed node providers

content/get-started/learning-to-code/index.md

@@ -31,4 +31,5 @@ children:
   - /storing-your-secrets-safely
   - /finding-and-fixing-your-first-code-vulnerability
   - /finding-and-fixing-your-first-dependency-vulnerability
+  - /bitcoin-wallet-development-overview
 ---