Blockchain
Custom crypto wallets for web, iOS, and Android — non-custodial, custodial, or smart contract wallets — built with secure key management and multi-chain support.
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What it is
A cryptocurrency wallet stores private keys, signs transactions, and submits them to blockchain networks. Wallets are non-custodial (user controls keys), custodial (platform controls keys), or smart contract wallets (keys managed by on-chain logic), each with different security trade-offs.
What you get
Wallet UX is one of the highest barriers to blockchain adoption. Seed phrases, gas estimation, network switching, and transaction confirmation dialogs are all friction points that reduce conversion. We build wallets that abstract this complexity while maintaining the security properties that make self-custody meaningful.
We cover all wallet architectures: non-custodial HD wallets with BIP-39 seed phrase generation and encrypted local storage, custodial wallets with HSM-backed key management for enterprise and retail platforms, and smart contract wallets (ERC-4337 account abstraction) for gasless transactions and social recovery.
Beyond key management, wallets require live blockchain data: balance fetching across chains, transaction history with decoded contract interactions, NFT display, token price data, and fee estimation. We integrate with Alchemy, Infura, and direct node RPC to ensure data is accurate and responsive.
Key capabilities
Each engagement is scoped to your requirements — these are the core capabilities we bring to the table.
Hardware wallet integration (Ledger, Trezor)
Biometric and PIN authentication with secure enclave storage
WalletConnect v2 for DApp connectivity
NFT display, token swaps, and staking directly in wallet
Push notifications for incoming transactions and price alerts
Our process
A structured, engineering-led approach that moves from understanding your goals to a production system — with no handoff surprises.
Typical engagement
8–16 WEEKS
We map your goals, constraints, and existing infrastructure. Scope is defined and success criteria agreed before any development begins.
We design the technical approach, select the right tools, and produce a milestone-driven delivery plan with no ambiguity.
Iterative development with regular demos. Code reviews, test coverage, and documentation happen in parallel — not at the end.
Production release with monitoring setup and handover documentation. We stay close during the first weeks post-launch.
Built with
Custodial wallets (you hold the keys) are simpler to build, support password recovery, and are required for regulated financial products. Non-custodial wallets (user holds the keys) offer true self-sovereignty and reduce your liability for key management, but require users to safely store seed phrases. Smart contract wallets (ERC-4337) offer a middle ground: user-controlled keys with social recovery and no seed phrase exposure.
For non-custodial wallets: seed phrase backup during setup, with options for encrypted cloud backup to iCloud or Google Drive. For smart contract wallets: social recovery via trusted guardian addresses. For custodial wallets: standard account recovery via email/phone, as private keys are held server-side.
We build wallets that support any EVM-compatible chain (Ethereum, Polygon, Arbitrum, Base, BSC) with a single key pair, plus Bitcoin, Solana, and other chains with separate key derivation. ERC-20 tokens, ERC-721/1155 NFTs, and native gas tokens are supported by default. Custom token support requires adding the token contract address.
Work with us
Share what you're building — we'll respond within one business day with questions or a proposal outline.
