- Wrote Factory, Periphery, Router, MasterChef, Timelock, and bridge smart contracts with Solidity based on Uniswap V2core codebase and protected them against security vulnerabilities like reentrancy, underflow/overflow and flash loan attacks. - Upgraded from ERC721 to ERC721A standard, created ERC-1115-based smart contracts, introduced EIP-2981 standard, and implemented a gasless whitelist in NFT smart contracts using Merkle Trees. - Installed a Moralis server and used the Moralis 1inch plugin for a token swap function, added a fiat payment function for buying crypto using a fiat on-ramp, and provided the users with secure real-time price charts with Chainlink Data Feeds. - Used a Pinata (IPFS pinning service) dedicated gateway for overcoming the rate limit and storing NFT images on a decentralized storage. - Built an application sidechain using Cosmos SDK and used it for the NFT P2E game.- Development of the backend using Node.js/Express.js and TypeScript, deploying Express.js APIs to AWS with Lambda and DynamoDB, and working on DynamoDB streams with Amazon OpenSearch service.

- Worked as a professional web developer and SEO expert for about a year.- My responsibilities were to build websites using different technologies (Laravel, WordPress) and more, And manage and keep them on top ranking on Google. - I also ran marketing campaigns on Google and social media platforms like Facebook and LinkedIn.