daniazhuk

Led development and re-architecture of a large React Native app into a modular, scalable platform. Implemented Redux Toolkit and optimized navigation and performance for high-load use. Built CI/CD pipelines and automated release processes for iOS and Android. Collaborated with product and design to enhance onboarding and driver UX.

Migrated legacy JavaScript to TypeScript and improved component architecture. Designed and implemented financial transaction flows with React and Redux Toolkit. Built automated testing pipelines using Jest and Detox. Improved reliability and consistency of the reporting and onboarding experience.

Built blockchain-based investment platform using React, Next.js, and Stellar smart contracts. Integrated REST APIs, Web3, and responsive UI with Tailwind CSS. Established CI/CD, testing pipelines, and modular architecture for rapid iteration.

Worked on multiple blockchain and crypto-related products, including token dashboards, DeFi platforms, and NFT marketplaces. Developed React and Next.js web apps with real-time data via WebSocket and GraphQL. Built React Native crypto wallets featuring biometric login, encrypted key storage, and QR scanning. Integrated MetaMask, WalletConnect, and Ledger hardware wallets for secure transaction signing. Created staking dashboards and cross-chain analytics tools using Ethers.js, Web3.js, and Recharts. Implemented KYC/AML verification, 2FA, and Passkey authentication for crypto and fintech platforms. Optimized UI performance with lazy loading, memoization, and code splitting (Vite, Next.js). Contributed to smart contract testing and frontend interaction debugging (Remix IDE, Hardhat). Designed modular UI systems with Tailwind, Storybook, and TypeScript. Collaborated with small teams and startups to deliver MVPs, manage CI/CD, and ensure scalability.