Cryptocurrency Wallet Development
NNT Software builds custodial, non-custodial, hybrid and smart-contract (ERC-4337) crypto wallets across iOS, Android, web and browser extension, with multi-chain support, in-app swap/staking and full white-label branding for exchanges, Web3 platforms and remittance apps.
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Technology partnership that feels structured, fast, and dependable
We help businesses move from scattered tools and manual work to stable digital systems that are easier to manage, scale, and improve over time. Our approach blends business understanding, practical execution, and long-term support.
Custom software aligned to your workflows, approval cycles, and reporting needs.
Clear delivery process with strong communication from discovery to launch.
Solutions designed for future growth, integrations, automation, and security.
2000+
Global clients served
50+
In-house specialists
2000+
Projects delivered
300+
Startup builds supported
98%
Client retention rate
16+
Years of experience team
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Current Project Demos
A selection of platforms we've designed and built, for reference:
What Is Cryptocurrency Wallet Development?
Generic wallet apps rarely fit a specific product's compliance model, supported assets or user experience. A wallet is also the most user-facing part of a crypto product and the most frequently attacked, which means security and UX decisions have to be made together rather than one being bolted onto the other.
NNT Software builds custodial, non-custodial, hybrid and smart-contract (account-abstraction) wallets tailored to exchanges, Web3 platforms, gaming ecosystems and remittance products, with the security engineering and multi-chain support that users and regulators both expect.
How It Works
Wallet architecture starts with one decision that shapes everything else: who controls the private keys.
Step 1
In a custodial model, keys are generated and secured on your infrastructure (ideally MPC or HSM-backed), and users interact through a familiar login-based experience.
Step 2
In a non-custodial model, keys are generated and encrypted on the user's device, with recovery handled through a seed phrase, social recovery, or secure enclave-backed biometrics.
Step 3
Smart-contract (account abstraction) wallets add programmable logic on top of a standard key model: gasless transactions, spending limits, or social recovery baked into the contract itself.
Step 4
Regardless of model, the wallet connects to supported blockchains, exposes swap/staking/dApp features, and syncs balances and transaction history in real time.
Step 5
Security layers, biometrics, 2FA, transaction signing confirmations, are layered on top based on the sensitivity of the action.
Core Features & Capabilities
Custodial, non-custodial and hybrid models
Choose the control/compliance trade-off that fits your product and regulatory posture, or offer more than one.
Smart-contract wallets (ERC-4337)
Account abstraction enables gasless transactions, spending limits and social recovery without sacrificing security.
Multi-chain & multi-token support
One wallet interface across Bitcoin, Ethereum and EVM chains, Solana, Tron and others.
In-app swap & staking
Let users exchange and earn yield on assets without leaving your app.
Biometric authentication & 2FA
Layered security appropriate to transaction risk, from balance viewing to high-value transfers.
Seed phrase & social recovery options
Give non-custodial users a recovery path that doesn't rely solely on remembering a seed phrase.
WalletConnect & dApp browser integration
Let users interact directly with DeFi and Web3 applications from inside your wallet.
Full white-label branding
Consistent branding across iOS, Android, web and browser extension.
Security & Architecture
- Encrypted key storage using secure enclave / TEE where available on-device
- HSM-backed signing for custodial deployments
- Regular penetration testing across app and backend
- Session and device management to detect suspicious login patterns
Our Development Process
1. Wallet model & chain scoping
We decide on custodial / non-custodial / hybrid and the specific blockchains to support based on your target users.
2. Security architecture
Key storage approach, encryption standards and recovery mechanisms are defined before any UI work starts.
3. Core wallet development
Native or cross-platform development across your target platforms, built around the defined security model.
4. Feature integration
Swap, staking, dApp browser and other product features are layered on top of the secure core.
5. Penetration testing & QA
Independent security testing and structured QA before any app store submission.
6. Release & ongoing maintenance
App store release plus ongoing SDK and library updates as blockchains evolve.
Who This Is Built For
Exchanges
Offer a branded companion wallet that keeps users inside your ecosystem instead of relying on third-party wallets.
Web3, gaming and NFT platforms
Give users a wallet built for their specific asset types and in-app economies.
Remittance & cross-border apps
Combine wallet functionality with payment rails for a seamless send/receive experience.
Banks & fintechs
Add crypto wallet features to an existing app without compromising the security standards your users already expect.
Want to chat about your dream crypto project?
Schedule a free project consultation with one of our solutions architects today!
Book a project callBusiness Benefits
- Keeps users inside your product ecosystem instead of routing to third-party wallets
- Custom UX designed around your specific user base and asset types
- Security architecture matched to your actual risk model, not a generic template
- Faster iteration on new features than integrating a closed third-party SDK
Common Challenges We Solve
Users losing access to non-custodial wallets
Social recovery and secure enclave-backed biometric options reduce reliance on remembering a seed phrase without compromising self-custody.
Supporting new chains without a rebuild
A modular chain-integration layer lets new blockchains be added without touching the core wallet architecture.
Balancing UX simplicity with security prompts
Risk-based authentication applies stronger checks only to higher-risk actions, keeping everyday use frictionless.
Why N&T Software
Proven mobile and blockchain engineering team in-house
Security-first defaults across every wallet model we build
Fast MVP delivery without cutting corners on key management
Ongoing SDK/library maintenance as chains and standards evolve
Cost & Timeline Factors
The main cost drivers are the number of blockchains supported, whether the wallet is custodial (requiring backend custody infrastructure) or non-custodial (requiring robust on-device security), and how many platforms you need at launch, iOS, Android, web or browser extension. A focused single-chain non-custodial MVP is the fastest path to market; a multi-chain custodial wallet with swap, staking and fiat on-ramp is a larger build.
Frequently Asked Questions
Custodial wallets hold private keys on the user's behalf, offering easier recovery and compliance control; non-custodial wallets give users full control of their private keys, offering more autonomy but requiring stronger user education on recovery.
Bitcoin, Ethereum and EVM-compatible chains, Solana, Tron and others based on your product's needs.
Yes, staking, swap and on/off-ramp features are common additions we build directly into the wallet.
A focused MVP wallet typically launches in 8-12 weeks; a full-featured multi-chain wallet with swap, staking and fiat rails takes longer depending on scope.
Chain support, custodial model, security architecture (e.g. MPC vs standard key storage), and the number of platforms (iOS/Android/web) are the main cost drivers.
Yes, integration with popular hardware wallets can be added for users who want an additional layer of cold-storage security.
For products that want gasless transactions or programmable spending limits, ERC-4337-based smart-contract wallets are increasingly the better long-term choice over traditional key-based wallets.
Private keys are encrypted and, where possible, secured in a device's secure enclave/TEE so that even a compromised app cannot directly expose raw key material.
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