Web3 & Crypto Wallet Development

_WHY FOUNDERS CHOOSE REDDUCK

/01

$1.7B+

in assets secured across projects we've shipped

/02

10/10

Hacken audit score on production smart contracts

/03

5.0

rating on Clutch — verified client reviews

/04

Top Rated

on Upwork — $1M+ earned

_WHAT WE BUILD

We work with founders building wallets for consumer fintech apps, institutional custody solutions, DeFi platforms, and everything in between.

Full-cycle delivery — from key management architecture to App Store launch

Non-Custodial Wallet Development

HD wallet architecture, BIP-32/39/44 derivation paths, secure key generation and storage. Private keys stay on the device - we design the architecture to ensure that holds under every failure mode, not just the happy path

Account Abstraction (ERC-4337)

Smart contract wallets with social recovery, session keys, gas sponsorship, and batch transactions. The UX layer that makes wallets usable for people who don't know what a seed phrase is - without compromising self-custody

Mobile Wallet (iOS + Android)

React Native / Expo for cross-platform delivery. Biometric auth, push notifications, real-time balance updates, DeFi integrations, NFT support. Built for users who expect the same polish as their banking app

Web3 Wallet & dApp Integration

Wallet connect flows, WalletConnect v2, SIWE (Sign-In with Ethereum), EIP-712 signing, transaction simulation before confirmation. The integration layer between your product and the on-chain world

Fiat On/Off Ramp Integration

MoonPay, Transak, Coinbase Onramp, Privy - we've integrated all of them. Card payments, Apple Pay, Google Pay flowing into crypto positions with minimal friction. Designed for users with zero prior crypto experience

Multi-Sig & Threshold Signature Wallets

Multi-signature structures across EVM, Bitcoin, and Solana. Native Bitcoin Script multisig, P2SH, P2WSH - we go deeper than most teams on the Bitcoin side. MPC and threshold signature schemes for institutional custody where eliminating single points of failure isn't optional

Hardware Wallet & Secure Enclave

Ledger and Trezor integration, secure enclave key storage (iOS Secure Enclave, Android Keystore), hardware-backed signing flows for institutional-grade security requirements

_CASE STUDY

GoWallet — Multi-Chain Crypto Wallet

Full-cycle wallet development: key management architecture, multi-chain support, fiat on-ramp integration, mobile apps (iOS + Android), DeFi connectivity.

WHAT WE BUILT:

Non-custodial HD wallet architecture
Multi-chain support: EVM + Solana
MoonPay and Coinbase Onramp integration: card, Apple Pay, Google Pay - Privy for wallet-based auth and embedded wallet flows
Mobile apps: React Native / Expo
Real-time balance tracking, transaction history, push notifications

InvariFi — DeFi Platform with Mobile Wallet

Full-stack DeFi platform including mobile wallet, staking flows, and portfolio management. iOS + Android delivery alongside smart contracts, backend, and dashboard

RESULT:

launched on time, passed audit, positive user feedback on wallet UX and staking flow.

_HOW DO WE WORK?

The wallet development process with RedDuck — the blockchain solutions company that is worth it, always follows these steps.

We define custody model, key management approach, chain support, and security requirements before any code is written. If your use case needs MPC instead of multisig — or account abstraction instead of EOA — we'll tell you in discovery.

For smart contract wallets, multisig contracts, vault logic — written, tested, and delivered with 100% branch coverage before audit submission.

iOS, Android, and web interfaces built to production standard. We've delivered the full stack — wallet core, mobile app, and backend — as a single team.

Fiat on-ramp provider integration, WalletConnect flows, and third-party API integrations. Edge cases handled: payment failures, pending states, and KYC drop-offs.

Security audit coordination, App Store submission, and post-launch monitoring. We don't disappear after launch.

_FREQUENTLY ASKED QUESTIONS

Custodial: your platform holds the keys. Non-custodial: the user holds the keys. The development complexity is different, the security model is different, and the regulatory exposure is different. We build both and will advise on which fits your product in discovery

Yes - including native Bitcoin Script multisig, P2SH and P2WSH structures, PSBT-based co-signer flows, and Taproot. This is more specialized than EVM multisig and most teams don't have this depth.

MoonPay, Transak, Coinbase Onramp, Privy, and Ramp. We've integrated all of them in production and know where each breaks under edge cases

MVP with core flows (key management, send/receive, single chain): 6–10 weeks. Full-featured multi-chain mobile wallet with on-ramp and DeFi integrations: 12–20 weeks. We define this with a clear breakdown in the first call

Yes. We've done both greenfield builds and integrations on top of existing wallet infrastructure. If you have a codebase, we'll review it before scoping.

Yes - including Apple and Google Play submission, review process navigation, and compliance requirements for financial apps.