Do you build PSD2-aligned open banking APIs for Frankfurt institutions?

Yes, including account information and payment initiation APIs with compliant consent and authentication flows.

Can you help modernize our legacy banking core?

Yes, we specialize in incremental core modernization that avoids a risky big-bang rewrite while meeting German banking supervisory expectations.

Do you build GDPR-aligned data architecture?

Yes, data minimization, encryption, and access-control patterns are built into our architecture by default for platforms handling EU personal data.

What's the difference between custodial and non-custodial wallets?

Custodial wallets hold private keys on your behalf with easier recovery; non-custodial wallets give users full control of their private keys.

Which blockchains can the wallet support?

Bitcoin, Ethereum and EVM-compatible chains, Solana, Tron and others based on your product's needs.

Can the wallet include staking or in-app swaps?

Yes, staking, swap and on/off-ramp features are common additions we build directly into the wallet.

How long does it take to build an MVP wallet?

A focused MVP wallet typically launches in 8–12 weeks; a full-featured multi-chain wallet with swap and staking takes longer.

Blockchain & Crypto · Frankfurt

Cryptocurrency Wallet Development in Frankfurt

Generic wallet apps rarely fit a specific product's compliance model or user experience needs. Hurain Technologies builds custodial, non-custodial, hybrid and smart-contract (ERC-4337) crypto wallets tailored to exchanges, Web3 platforms, gaming ecosystems and remittance products — with multi-chain support, in-app swap/staking, and full white-label branding. In Frankfurt, that means building to the technical expectations of the local market.

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Frankfurt Market Landscape

Why wallet development is critical in Frankfurt

The European Central Bank's presence in Frankfurt shapes supervisory expectations for banks and payment institutions across the entire Eurozone, not just Germany.
Frankfurt's concentration of legacy core banking systems creates significant demand for incremental modernization work that avoids risky full core replacements.
Open banking API programs in Frankfurt commonly need to satisfy both PSD2-derived technical standards and BaFin's supervisory expectations simultaneously.

The Challenge

Problems we see teams struggling with

Limited wallet options for your product

Off-the-shelf wallets don't match your compliance model, supported assets, or UX requirements.

Custody security and key management

Keys must be secured on-device or on your infrastructure without exposing users to loss.

Multi-chain complexity

Supporting multiple blockchains from one wallet interface multiplies engineering effort.

User recovery and support friction

Seed phrase recovery is user-hostile; social recovery and secure enclave options solve this.

Poor UX driving support ticket volume

Confusing transaction confirmations, unclear gas fee estimates, and cryptic error messages generate a disproportionate share of support load for consumer wallet products.

App store and platform compliance friction

iOS and Android have specific, evolving policies around crypto wallet apps that can delay or block a launch if not planned for early.

Our Approach

How we deliver wallet development in Frankfurt

Custodial wallets

You hold keys on secure infrastructure; users get login-based ease of use.

Non-custodial wallets

Users hold their own keys with seed phrase, social recovery, or secure enclave-backed biometrics.

Smart-contract wallets (ERC-4337)

Account abstraction enables gasless transactions, spending limits, and social recovery without sacrificing security.

Multi-chain support

One wallet interface across Bitcoin, Ethereum, EVM chains, Solana, Tron and others.

In-app features

Swap, staking, dApp browser, and WalletConnect integration.

Full white-label branding

Consistent branding across iOS, Android, web and browser extension.

UX research and simplification

Transaction flows and error states designed around what users actually understand, reducing support burden and abandonment.

Technology

Tech stack we work with

Mobile

Swift (iOS)Kotlin (Android)React Native cross-platform

Key Storage

Secure enclave / TEEHSM-backed signingSeed phrase encryption

Chains

BitcoinEthereumEVM chainsSolanaTron

Features

WalletConnectdApp browserSwap aggregationStaking

FAQ

Wallet Development in Frankfurt — FAQ

Yes, we specialize in incremental core modernization using strangler-fig migration patterns that avoid a risky big-bang rewrite while meeting German banking supervisory expectations.