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Fiverr Pro
Nederlands
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JOY E
@elijahjoy01
Crypto wallet developer, AI app builder, Flutter and React Native expert
Nigeria
Engels, Frans, Duits
Over mij
I'm Elijah Joy, a mobile and AI app developer building secure, production-ready apps for startups and entrepreneurs.
I specialize in crypto wallet apps, DeFi wallets, and Web3 mobile apps using Flutter and React Native — non-custodial, multi-chain, and built to last. I also build AI-powered MVPs and ecommerce apps using Flutter, Lovable, and Bolt.new, so founders can launch fast without compromising on quality.
🔐 Crypto wallets · Web3 apps · AES encryption · Biometric auth
🚀 AI MVPs · Ecommerce apps · Full source code · No lock-in
Let's build something your users will trust.
Skills
JOY E
offline •
Gemiddelde reactietijd: 1 uur
Bekijk mijn diensten
Crypto wallet aanmaken
I will develop a secure crypto wallet app, defi wallet and web3 mobile app
Van website naar app
I will develop a flutter ecommerce app with woocommerce or shopify integration
Werkervaring
Freelance Blockchain & Mobile App Developer
Blockchain • Freelance
Apr 2024 - Present • 2 yrs 2 mos
I design and develop secure, non-custodial crypto wallet apps and web3 mobile applications for blockchain startups, DeFi projects, and token launches worldwide. My work spans the full development lifecycle — from architecture and smart contract integration to UI/UX design, testing, and app store deployment. Key deliverables: • Multi-chain crypto wallet apps (ETH, BTC, SOL, BNB, MATIC) built with Flutter and React Native • DeFi wallet platforms with token swap, staking, and portfolio tracking • Web3 mobile app integration with Ethers.js, Web3.js, Moralis, and Alchemy • Non-custodial wallet architecture with AES encryption and biometric authentication • White-label wallet solutions for startups and fintech brands • App Store and Google Play deployments
Blockchain Startups
DeFiChain Income • Freelance
May 2021 - Jul 2024 • 3 yrs 2 mos
Worked with multiple blockchain startups on contract to build and integrate Web3 and DeFi features into mobile and web applications. Core work included: • Connecting mobile apps to Ethereum, Solana, and BSC smart contracts using Ethers.js and Web3.js • Building token swap interfaces and DEX integrations (Uniswap, PancakeSwap) • Implementing staking and yield farming dashboards for DeFi protocols • Wallet connection flows using WalletConnect and MetaMask SDK • NFT minting and display modules for mobile wallet apps • Gas fee estimation, transaction signing, and on-chain data fetching Supported projects from MVP stage through to mainnet launch.
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Fintech & Web3 Clients
Fiverr • Freelance
May 2020 - Jul 2023 • 3 yrs 2 mos
Developed cross-platform mobile applications for fintech startups and early-stage web3 companies, focused on payment systems, digital wallets, and blockchain-connected interfaces. Responsibilities included: • Building iOS and Android apps using Flutter and React Native from scratch • Integrating RESTful APIs and blockchain node providers (Infura, Alchemy) • Implementing secure local storage, encryption, and authentication flows • Designing clean, user-friendly UI for financial and crypto applications • Collaborating directly with founders and product teams on feature scope and delivery timelines Delivered 10+ mobile apps across fintech, e-commerce, and early DeFi categories.
