Secure Crypto Wallet Development — Custodial, Non-Custodial, and Multi-Chain
Quecko builds wallet infrastructure that users trust with their assets. From non-custodial mobile wallets and browser extensions to MPC-powered institutional custody solutions, we engineer wallets with the security architecture, UX polish, and multi-chain support that the market demands.
A wallet is the first thing users touch — and the last thing they'll forgive if it fails.
Wallet development sits at the intersection of cryptography, UX design, and multi-chain infrastructure — and getting any one of those wrong means losing users or losing funds. Most teams either build wallets with poor key management that creates security vulnerabilities, or over-engineer the security to the point where the UX becomes unusable. Quecko builds wallets that balance institutional-grade security with consumer-grade simplicity — HD key derivation, multi-party computation, biometric authentication, and seamless multi-chain support, all wrapped in interfaces that non-technical users can navigate without a tutorial.
Engineering Production-Grade Crypto Wallet Development Services Infrastructure
Wallet Architecture & Key Management Design
We define the custody model (custodial, non-custodial, MPC), key derivation paths, backup/recovery flows, and multi-chain support requirements.
Core Wallet Development
Key generation, transaction signing, chain-specific integrations, token management, and UI/UX implementation. For mobile: native iOS/Android or cross-platform (Flutter/React Native).
Security Hardening & Penetration Testing
Key storage encryption validation, transaction simulation testing, phishing protection, biometric auth testing, and full penetration testing by our security team.
Launch & Ecosystem Integration
App store submissions, browser extension publishing, dApp ecosystem integrations, user onboarding flows, and post-launch monitoring.
Comprehensive Wallet Engineering
Explore our technical specialties, engineering practices, and developer skills.
Non-Custodial Wallet Development
Self-custody wallets where users own their keys. We implement HD wallet derivation (BIP-32/39/44), encrypted local key storage, seed phrase backup flows, and recovery mechanisms that balance security with usability.
Custodial & Institutional Wallet Solutions
Enterprise-grade custody infrastructure with HSM integration, multi-signature authorization, role-based access control, and full audit trails. Built for institutions that need compliance-ready asset management.
MPC Wallet Architecture
Multi-party computation wallets that eliminate single points of failure. We implement threshold signature schemes where no single party holds the complete private key — combining institutional security with seamless UX.
Multi-Chain Wallet Support
Unified wallet interfaces supporting EVM chains, Solana, Bitcoin, Cosmos, and custom networks. We handle chain-specific transaction signing, gas management, and token standard compatibility across ecosystems.
Browser Extension & Web Wallets
Chrome/Firefox extension wallets with dApp injection, transaction simulation, and phishing protection. We build extensions that integrate seamlessly with DeFi, NFT, and Web3 applications.
Wallet-as-a-Service (WaaS) Infrastructure
White-label wallet SDKs and APIs for platforms that need embedded wallet functionality — social login onboarding, gasless transactions, and session key management for Web3 apps.
Is This Service a Fit for You?
Ideal Match
- ✓Crypto startups building their own branded wallet, exchanges needing integrated custody, DeFi protocols requiring embedded wallet flows, or enterprises entering Web3 with institutional custody needs.
Not a Fit
- —Teams looking for a MetaMask integration guide — we build custom wallet products, not tutorials.
From Day 1 to Day 90: What Wallet Execution Looks Like
How we take your Crypto Wallet Development Services requirements from day 1 to production delivery.
Custody model selection, key derivation design, multi-chain support mapping, UI/UX wireframes, and security requirements documentation.
Key management implementation, transaction signing for target chains, token display/management, send/receive flows, and backup/recovery UX.
Penetration testing, key storage audits, transaction simulation testing, phishing protection, biometric integration, and cross-chain transaction validation.
App store/extension publishing, dApp connector integration, user onboarding optimization, monitoring setup, and documentation.
Day 1–15 — Architecture & Key Design
Custody model selection, key derivation design, multi-chain support mapping, UI/UX wireframes, and security requirements documentation.
Day 16–45 — Core Development
Key management implementation, transaction signing for target chains, token display/management, send/receive flows, and backup/recovery UX.
Day 46–75 — Security & Testing
Penetration testing, key storage audits, transaction simulation testing, phishing protection, biometric integration, and cross-chain transaction validation.
Day 76–90 — Launch & Integration
App store/extension publishing, dApp connector integration, user onboarding optimization, monitoring setup, and documentation.
Technologies We Master
Tools, frameworks, and protocols we use to build secure and scalable solutions.
Key Management
BIP-32/39/44
ECDSA
EdDSA
Shamir's Secret Sharing
MPC (TSS)Mobile
Swift (iOS)
Kotlin (Android)
Flutter
React NativeWeb/Extension
React
TypeScript
Chrome Extension APIs
Web3Modal
WalletConnectChains
Ethereum
Polygon
Arbitrum
Optimism
Solana
Bitcoin
Cosmos
BSC
Avalanche
custom chainsSecurity
HSM integration (AWS CloudHSM, Azure HSM)
Secure Enclave
biometric APIsInfrastructure
Node.js
Go
PostgreSQL
Redis
AWS KMSYour Wallet Guards Every Asset Your Users Own. We Build It Like That Matters.
Our wallet engineers understand HD derivation, threshold signatures, and key management at a cryptographic level — not just at an API level.
Cryptography-First Engineering
Our wallet engineers understand HD derivation, threshold signatures, and key management at a cryptographic level — not just at an API level.
Multi-Chain Native
We don't bolt on chain support as an afterthought. Our wallets are architected for multi-chain from day one — EVM, Solana, Bitcoin, Cosmos, and beyond.
Security Without UX Sacrifice
Institutional-grade key management wrapped in interfaces that non-crypto-native users can navigate. Security and usability aren't trade-offs — they're both requirements.
250+ Products Shipped
From consumer mobile wallets to institutional MPC custody, we've built wallet infrastructure trusted with real assets at scale.
Our Work
Our Projects
“With hard work, determination, and an amazing team at Quecko, we can overcome any obstacle and achieve anything we set our minds to.”
Mateen O Dawood
Stable33 ProtocolHow We Collaborate
Dedicated Wallet Pod
Full-time mobile/web engineers, cryptography specialists, and security testers working as your wallet development team.
Project-Based Delivery
End-to-end wallet development from architecture to app store launch, with security audit included.
Wallet-as-a-Service SDK
White-label wallet infrastructure delivered as an embeddable SDK for your existing platform.
Frequently Asked Questions
Latest Stories from Quecko
Ready to build a wallet your users will trust?
Whether you need a consumer mobile wallet, institutional MPC custody, or an embedded wallet SDK — Quecko's engineers build wallet infrastructure with the security and UX your users and assets deserve.