Engineering DeFi and CeFi Wallets for the Modern Crypto Economy

Overview

The explosion of decentralized finance (DeFi) and continued growth of centralized crypto services (CeFi) have made digital wallets the cornerstone of user engagement in the Web3 ecosystem. A fintech client approached Infinity Technologies with an ambitious goal: develop two powerful cryptocurrency wallets — one focused on decentralized services aggregation, and another designed for centralized lending, earning, and exchange.

The result was a pair of interoperable platforms:

• A DeFi Wallet, designed for transparency, self-custody, and real-time engagement with decentralized protocols
• A CeFi Wallet, structured to provide bank-like services with familiar UX and compliance layers

Together, they serve both crypto-native users and those transitioning from traditional finance into digital assets.

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Business Challenge

Most wallet solutions are either too basic or too siloed — offering only storage without meaningful earning opportunities, or complex functionality without proper UX. The client wanted to:

• Enable users to access DeFi features from a single interface, without switching between protocols or chains
• Support staking, farming, and DEX swaps across multiple blockchains
• Provide a regulated, centralized platform for interest earning, token lending, and fiat on/off ramps
• Ensure high security for both custodial and non-custodial assets
• Build infrastructure that could eventually be white-labeled and licensed to partners

Each wallet had to be tailored to different user mindsets and compliance requirements, while sharing a unified tech and design philosophy.

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Our Solution

Infinity Technologies built and deployed two specialized wallet platforms, integrated into a common backend architecture but designed with user-centric experiences for DeFi and CeFi audiences.

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DeFi Wallet Aggregator

A non-custodial wallet built for advanced users, offering full transparency and DeFi protocol access in a single interface.

Key Features:

• Multi-chain support: Ethereum, BNB Chain, Polygon, Arbitrum
• Staking interface: Users can stake supported tokens with live APY displays and flexible lockups
• Yield farming aggregator: Unified view of top-performing LP pools across leading DeFi protocols (e.g. Uniswap, PancakeSwap, SushiSwap)
• DEX swap aggregator: Built-in swap interface with slippage control and token tracking
• WalletConnect and QR code integration for DApp use
• Gas fee optimizer and network health indicators

Security & Control:

• Users retain full custody of keys
• Seed phrase backup and recovery
• No user data stored on centralized servers

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CeFi Wallet Platform

A centralized finance wallet offering seamless onboarding, fiat compatibility, and crypto earning products — ideal for users new to digital assets or seeking passive returns.

Key Features:

• Interest-earning accounts: Users deposit assets (USDT, BTC, ETH) and earn predictable yields
• Lending module: P2P or platform-issued crypto loans with collateralization
• Exchange interface: Internal token swaps at competitive rates with fiat support
• Deposit/withdrawal via card or bank transfer (region-specific integrations)
• KYC onboarding and AML compliance integrated from the start
• Admin portal: Risk management tools, compliance dashboards, transaction monitoring

Security & Compliance:

• Custodial architecture with cold wallet storage
• Multi-factor authentication, transaction verification
• GDPR-compliant user data handling
• Real-time fraud detection and withdrawal limits

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Technology Stack

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Outcomes and Business Value

The two wallet platforms are now in active use and support thousands of users. Key outcomes included:

• DeFi Wallet:
  • Increased TVL (total value locked) by 3x in the first 60 days
  • High retention from experienced users thanks to aggregation and transparency
  • 20+ protocols integrated with dynamic reward calculation
• CeFi Wallet:
  • Seamless onboarding for non-crypto users with fiat deposit options
  • Average 6–8% yield products adopted by 60% of early users
  • Successfully passed 3rd-party compliance and penetration testing audits

The dual-wallet approach allows the client to serve two distinct markets — crypto natives and Web2 migrants — while growing both ecosystems through cross-promotion.

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Conclusion

Infinity Technologies delivered a two-pronged wallet strategy that empowers users across the crypto maturity spectrum. By blending decentralized finance freedom with centralized finance simplicity, we enabled a secure, scalable, and inclusive digital finance experience.

This case demonstrates our expertise in DeFi and CeFi product design, blockchain integration, and building trusted financial platforms for the next era of digital money.

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