Aatka K.

I’m a Full Stack Blockchain Developer with 5+ years of experience building secure, scalable Web3 applications, backend systems, and smart contract solutions. I work across the complete product stack, from Solidity smart contracts and blockchain architecture to Node.js backends, APIs, databases, wallet integrations and modern frontend applications. My core expertise includes Solidity, Ethereum, EVM chains, Solana, Node.js, TypeScript, React, Vue, Express.js, PostgreSQL, Supabase, Ethers.js, OpenZeppelin, Hardhat and Foundry. I’ve worked on smart contracts, DeFi platforms, NFT marketplaces and collections, token systems, staking mechanisms, DAOs, healthcare applications, trading automation and custom Web3 applications. One of my smart contracts was audited by Hacken and received a 9.2/10 security score. I can help with new Web3 products as well as existing applications that need smart contract development, blockchain integrations, backend development, API integrations, wallet connectivity, contract upgrades, debugging or performance improvements. If you already have a product, existing codebase or technical requirements, I can jump in and help take it from development to a reliable production-ready solution. 𝗞𝗘𝗬 𝗣𝗥𝗢𝗝𝗘𝗖𝗧𝗦 𝖳𝗋𝖺𝖽𝖾𝗋𝗏𝖾𝗋𝗌𝖾.𝗂𝗈: Led smart contract development, created the front-end in VUE, and managed APIs with Node.js & Express.js. Used GCP for secure data handling. 𝖲𝗂𝗌𝗍𝖾𝗋𝗌 𝗈𝖿 𝖲𝖺𝗍𝗎𝗋𝗇 & 𝖲𝗇𝖾𝖺𝗄𝗒 𝖯𝗅𝖺𝗒𝖾𝗋𝗌: Designed and deployed smart contracts, implemented NFT layering, and executed front-end integrations. 𝖳𝖺𝗄𝖾-𝗈𝖿𝖿 𝖳𝗈𝗄𝖾𝗇 (𝖣𝖾𝖥𝗂 𝖯𝗋𝗈𝗃𝖾𝖼𝗍): Built a smart contract audited by Hacken, receiving a 9.2/10 score. 𝖡𝗅𝗈𝗈𝗆𝗅𝖺𝖻𝗌 𝖢𝗈𝗆𝗉𝖺𝗇𝗒: decentralized applications, NFT solutions. 𝗔𝗗𝗗𝗜𝗧𝗜𝗢𝗡𝗔𝗟 𝗪𝗢𝗥𝗞 Governance Smart Contract. asset-backed NFTs. Solana Arbitrage Bots: Built using TypeScript and Rust ERC-20 Tokens & DeFi Mechanisms: Developed ERC-20 tokens with unique buy/sell mechanics If you’re ready to bring an innovative project to life, let’s connect and discuss how I can bring your vision to reality.