cezarypowala

Developed user interfaces for DeFi platforms using React.js and Chakra UI, enabling users to interact with decentralized finance applications such as staking, lending, borrowing, and swapping cryptocurrencies. Integrated Wagmi, Web3.js and Ethers.js into front-end applications, allowing users to securely connect their MetaMask wallets to interact with Ethereum-based smart contracts. Ensured the seamless integration of Uniswap, SushiSwap, Aave, Compound, and other DeFi protocols into the front-end, enabling users to perform seamless transactions with minimal gas fees. Developed dynamic UI components that allow users to track live data such as token prices, liquidity pool health, staking rewards, and transaction history using Chainlink oracles. Optimized the performance of DeFi applications, reducing page load time by 40% through efficient use of caching, code splitting, and lazy loading. Conducted unit and integration testing for front-end components using Jest, Cypress, and React Testing Library, ensuring high-quality, bug-free code. Collaborated with the back-end team to ensure smooth communication between the front-end and smart contracts, integrating contract events and transaction confirmations in real-time. Integrated DeFi dashboards that display real-time wallet balances, liquidity positions, APR rates, and loan health based on live smart contract data. Followed Agile methodologies, participating in daily stand-ups, sprint planning, and retrospectives, and delivering features iteratively.

Developed and maintained React.js web applications, optimizing them for performance, scalability, and usability, improving the user experience by 30%. Created reusable components with React and Redux for state management, enabling faster development and improved application maintainability. Integrated third-party APIs, including payment systems like Stripe and Google Maps, to add dynamic features to web applications. Worked closely with designers to ensure UI/UX designs were implemented accurately and consistently across web pages using CSS3, SASS, and Flexbox. Developed responsive web pages using CSS Grid and media queries to ensure seamless interaction across all devices, increasing mobile engagement by 25%. Implemented unit testing and integration tests using Jest and Cypress, ensuring high code quality and reducing bugs in production. Worked in an Agile environment, participating in sprint planning, daily stand-ups, and retrospectives. Conducted code reviews to ensure best practices and adherence to coding standards, improving team efficiency and code quality. Optimized application performance by reducing page load times by 20% through image compression, code splitting, and lazy loading. Led front-end features for a major product launch, contributing to a 40% increase in user retention.

Assisted in building and maintaining company website pages using HTML5, CSS3, and jQuery. Collaborated with designers to convert wireframes into responsive web pages. Wrote custom jQuery functions to implement interactive elements, such as image sliders and form validation. Worked on troubleshooting and bug fixing for cross-browser compatibility issues.