You have a Web3/Blockchain idea. I help you turn it into a working, deployed smart contract without issue. I build in Solidity using Foundry: token contracts (ERC-20), NFT collections (ERC-721), payment vaults, and ownership systems. I write tests before deployment in every projects so you're not guessing whether your contract works on mainnet. Recent projects: a decentralized tip jar deployed to Sepolia testnet with CI/CD pipeline, and a Chainlink-powered provably fair lottery with automated execution. I'm an Informatics Engineering student whose thesis covers ERC-4337 Account Abstraction — a protocol-level understanding most junior devs don't have. Available 30+ hrs/week. I communicate clearly and ship with documentation so you always know what you're getting.

My name is Julian and I am the founder and CEO of QuantDEFI Consulting. At QuantDEFI, our goal is to provide exceptional consulting and/or product design and development for any web3 project, ranging from full-stack construction, to security audits or automation services. My background includes full-stack development of smart-contract projects on all blockchains, with a specialty in solidity development and security. In addition to building web3 dApps, I also focus on the creation of transaction automation services for a variety of applications (arbitrage, liquidations, etc.) as well as efficient blockchain data indexing and analysis. We are familiar with all common web3 tooling, including the latest and greatest utilities to make development as efficient as possible. Some examples include: - Alchemy web3 - Foundry/hardhat/truffle - Moralis SDK (Unity/Godot web3) - theGraph - Chainlink/API3 Traditional stack tools include: - Javascript - Nodejs - Python - Golang - React/Vue/Angular - C#/.net - Unity/Godot Feel free to send a message outlining your project idea or development needs, and we will schedule an initial consultation at your convenience.

"𝐳𝐞𝐫𝐨 𝐝𝐞𝐥𝐚𝐲𝐬, 𝐳𝐞𝐫𝐨 𝐞𝐱𝐜𝐮𝐬𝐞𝐬 - 𝐆𝐮𝐚𝐫𝐚𝐧𝐭𝐞𝐞𝐝!" ✅ 𝟑+ 𝐘𝐞𝐚𝐫𝐬 𝐨𝐟 𝐄𝐱𝐩𝐞𝐫𝐢𝐞𝐧𝐜𝐞 𝐢𝐧 𝐒𝐦𝐚𝐫𝐭 𝐂𝐨𝐧𝐭𝐫𝐚𝐜𝐭 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐞𝐫 & 𝟒+ 𝐘𝐞𝐚𝐫𝐬 𝐨𝐟 𝐄𝐱𝐩𝐞𝐫𝐢𝐞𝐧𝐜𝐞 𝐢𝐧 𝐅𝐮𝐥𝐥 𝐬𝐭𝐚𝐜𝐤 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐞𝐫 ✅ 𝐁𝐮𝐝𝐠𝐞𝐭-𝐟𝐫𝐢𝐞𝐧𝐝𝐥𝐲 ✅ 𝟐𝟒/𝟕 𝐀𝐯𝐚𝐢𝐥𝐚𝐛𝐢𝐥𝐢𝐭𝐲 𝐟𝐨𝐫 𝐒𝐞𝐚𝐦𝐥𝐞𝐬𝐬 𝐂𝐨𝐦𝐦𝐮𝐧𝐢𝐜𝐚𝐭𝐢𝐨𝐧 ✅ 𝐇𝐢𝐠𝐡-𝐐𝐮𝐚𝐥𝐢𝐭𝐲 𝐖𝐨𝐫𝐤 Looking for a 𝗕𝗹𝗼𝗰𝗸𝗰𝗵𝗮𝗶𝗻 𝗱𝗲𝘃𝗲𝗹𝗼𝗽𝗲𝗿 who can bring your smart contract or 𝗪𝗲𝗯𝟯 𝗽𝗿𝗼𝗷𝗲𝗰𝘁 to life? I specialize in Solidity smart contracts and end-to-end Web3 solutions, building secure, scalable, and gas-optimized decentralized applications. I develop tokens, NFTs, dApps, and front-end interfaces with React and NextJS, delivering complete blockchain solutions from smart contract logic to user-friendly web interfaces. I also have hands-on experience with Chainlink, OpenZeppelin libraries, and various ERC standards, ensuring your smart contracts follow the best practices and remain secure. I focus on security, efficiency, and reliability, giving you confidence that your project will run flawlessly. 🖐 𝗠𝘆 𝗦𝗸𝗶𝗹𝗹𝘀 & 𝗘𝘅𝗽𝗲𝗿𝘁𝗶𝘀𝗲 𝗶𝗻 𝗕𝗹𝗼𝗰𝗸𝗰𝗵𝗮𝗶𝗻: ☑️ Solidity Development for EVM-compatible smart contracts ☑️ Token Development (ERC20) with features like Mintable, Burnable, and Whitelist ☑️ NFTs (ERC721 / ERC1155) with Whitelist, Royalties, Presale, and Public Sale ☑️ Chainlink Integration for decentralized oracles and automation ☑️ OpenZeppelin & ERC Standards for secure and reliable smart contracts ☑️ Full-Stack Web3 Development with React, NextJS, and Foundry ☑️ Deployment & Interaction Scripts for smart contracts ☑️ Focus on security, gas optimization, and best practices 𝗪𝗵𝘆 𝗪𝗼𝗿𝗸 𝗪𝗶𝘁𝗵 𝗠𝗲: 💎 Extensive Experience: Designed and built multiple smart contracts from scratch with secure deployment scripts 💎 Problem Solver: Skilled in designing projects from the ground up and delivering efficient, reliable solutions 💎 Gas Optimization: Write and test smart contracts to reduce gas fees while maintaining security and reliability 💎 End-to-End Development: From Solidity smart contracts to React/NextJS frontends 𝐌𝐕𝐏𝐬 𝐓𝐡𝐚𝐭 𝐇𝐞𝐥𝐩 𝐅𝐨𝐮𝐧𝐝𝐞𝐫𝐬 𝐒𝐡𝐢𝐩 𝐅𝐚𝐬𝐭: I take you from idea → fully working MVP with: - secure authentication - clean user flows - database + backend logic - admin panel - professional UI - deployment + documentation These are production-grade MVPs, not no-code demos. Most clients are able to test or launch with real users within 7–21 days. 𝗘𝘅𝗽𝗲𝗿𝗶𝗲𝗻𝗰𝗲 / 𝗔𝗰𝗵𝗶𝗲𝘃𝗲𝗺𝗲𝗻𝘁𝘀: ✔️ 3+ years of blockchain development experience ✔️ Developed Solidity smart contracts, ERC20 tokens, and ERC721/1155 NFTs ✔️ Built full-stack Web3 applications with React and NextJS ✔️ Integrated projects with Chainlink, OpenZeppelin libraries, and ERC standards ✔️ Delivered secure, gas-optimized, and reliable decentralized applications ✔️ Specialized in MVPs, SaaS platforms, and internal systems ✔️ Built with Lovable.dev + Supabase using production-ready architecture ✔️ Fast execution with clean, scalable code ✔️ Clear communication and structured delivery If you want your 𝗪𝗲𝗯𝟯 𝗽𝗿𝗼𝗷𝗲𝗰𝘁 to be secure, scalable, and ready for users, click Invite to Job or send me a message to discuss your project!

🌍 𝟓𝟎+ 𝐏𝐫𝐨𝐣𝐞𝐜𝐭𝐬 𝐃𝐞𝐥𝐢𝐯𝐞𝐫𝐞𝐝 | 💻 𝐄𝐧𝐝-𝐭𝐨-𝐄𝐧𝐝 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭 | 📈 𝐏𝐫𝐨𝐯𝐞𝐧 𝐑𝐞𝐬𝐮𝐥𝐭𝐬 🔗 𝐘𝐨𝐮𝐫 𝐆𝐨-𝐓𝐨 𝐁𝐥𝐨𝐜𝐤𝐜𝐡𝐚𝐢𝐧, 𝐅𝐮𝐥𝐥-𝐒𝐭𝐚𝐜𝐤 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐞𝐫 I'm a Senior Blockchain and Full-Stack Developer with 2 years of experience in blockchain technology and full-stack development. I’ve successfully delivered over 50 projects across web, decentralized applications, and enterprise software. My mission is to build scalable, secure, and high-performance solutions tailored to clients' needs. 👉 𝐁𝐥𝐨𝐜𝐤𝐜𝐡𝐚𝐢𝐧 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭: From smart contracts and token creation to full-fledged decentralized applications, I have deployed over 50 blockchain projects across various chains. ➤ Smart contract implementation and architecture planning ➤ Solidity (EVM - Ethereum / Arbitrum / Binance / Polygon) ➤ Frontend integration (Metamask and other wallets, ethers.js, web3.js, Thirdweb) ➤ Truffle / Hardhat ➤ Token/NFT implementation (ERC-20, ERC-777, ERC-1155, SPL on Solana) ➤ DeFi / NFT Marketplaces, Staking Platforms, DAOs ➤ ChainLink, IPFS, OpenZeppelin ➤ DEXs / AMMs / ICOs ➤ Token Migration ➤ Token Airdrops 👉 𝐁𝐚𝐜𝐤𝐞𝐧𝐝 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭: ➤ Node.js ➤ Express.js / Nest.js ➤ Django ➤ AWS, Google Cloud ➤ MySQL, TimescaleDB, PostgreSQL, MongoDB, Redis ➤ Firebase (Realtime database, Firestore, functions, optimization) ➤ Message queues (RabbitMQ, ZeroMQ, Bull) ➤ Socket.IO ➤ Kafka ➤ Google Cloud APIs (YouTube, Google Drive) ➤ PayPal, Stripe, and other payment processors 👉 𝐅𝐫𝐨𝐧𝐭𝐞𝐧𝐝 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭: ➤ React, Angular, Vue, Next.js ➤ Javascript, Typescript ➤ Tailwind, Bootstrap, Material UI ➤ CSS3, SASS, LESS 👉𝐃𝐞𝐯𝐎𝐩𝐬: ➤ AWS, Google Cloud ➤ Docker, Kubernetes ➤ Apache, nginx configuration and optimization ➤ Mail, DNS server configuration ➤ Prometheus 🛠️ 𝐓𝐨𝐨𝐥𝐬 & 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭 𝐄𝐧𝐯𝐢𝐫𝐨𝐧𝐦𝐞𝐧𝐭: Skilled with VS Code, Jira, Docker, Trello, Git, GitLab, and CI/CD practices for an efficient, agile workflow. ✔️ 𝐀𝐠𝐢𝐥𝐞 𝐏𝐫𝐚𝐜𝐭𝐢𝐜𝐞𝐬: Well-versed in Agile methodologies, ensuring timely and effective project delivery. 𝐋𝐞𝐭’𝐬 𝐜𝐡𝐚𝐭 𝐚𝐧𝐝 𝐭𝐮𝐫𝐧 𝐲𝐨𝐮𝐫 𝐢𝐝𝐞𝐚𝐬 𝐢𝐧𝐭𝐨 𝐨𝐮𝐭𝐬𝐭𝐚𝐧𝐝𝐢𝐧𝐠, 𝐬𝐞𝐜𝐮𝐫𝐞, 𝐚𝐧𝐝 𝐬𝐜𝐚𝐥𝐚𝐛𝐥𝐞 𝐬𝐨𝐥𝐮𝐭𝐢𝐨𝐧𝐬!

👋 𝐆𝐫𝐞𝐞𝐭𝐢𝐧𝐠𝐬 𝐭𝐨 𝐀𝐥𝐥 𝐕𝐚𝐥𝐮𝐞𝐝 𝐂𝐥𝐢𝐞𝐧𝐭𝐬! I’m Ankit a dedicated 𝐁𝐥𝐨𝐜𝐤𝐜𝐡𝐚𝐢𝐧, 𝐅𝐮𝐥𝐥 𝐒𝐭𝐚𝐜𝐤 𝐚𝐧𝐝 𝐋𝐢𝐠𝐡𝐭𝐬𝐩𝐞𝐞𝐝 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐞𝐫 providing clients with dedicated personalized service as an 𝐢𝐧𝐝𝐢𝐯𝐢𝐝𝐮𝐚𝐥 𝐟𝐫𝐞𝐞𝐥𝐚𝐧𝐜𝐞𝐫. I am actively engaged in developing blockchain-based solutions across various industries. Currently, I’m working on a DApp aimed at democratizing the global medical device sector by streamlining its supply ecosystem. My experience includes developing smart contracts, blockchain-based real estate investment platforms, decentralized gambling/lottery games, and blockchain-powered donation systems. My Technical Blockchain Development Expertise: Being a full-stack blockchain developer, I have decent expertise in Blockchain development and custom smart contract application development technologies: 🛠 𝐅𝐮𝐥𝐥-𝐒𝐭𝐚𝐜𝐤 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭: ✔️ Frontend: React.js, Next.js, Vue.js, TypeScript, Tailwind CSS. ✔️ Backend: Node.js, Django, NestJS, Laravel, Express.js. ✔️ Databases: MongoDB, PostgreSQL, MySQL. 💪 𝐓𝐨𝐨𝐥𝐬 & 𝐅𝐫𝐚𝐦𝐞𝐰𝐨𝐫𝐤𝐬: ↔️ Blockchain: Solidity, Rust, Hardhat, Truffle, Anchor, Remix IDE. ↔️ Integration: Ethers.js, Web3.js, Alchemy, IPFS, The Graph, Chainlink. 🔷 𝐒𝐞𝐫𝐯𝐢𝐜𝐞𝐬 𝐎𝐟𝐟𝐞𝐫𝐞𝐝: 💎 Custom token development (fungible and non-fungible). 💎 DApp & DAO creation with seamless wallet integration (MetaMask, Phantom). 💎 Smart contract audits to ensure security and reliability. 💎 Development of DEX platforms and CEX integrations. 💎 Advanced blockchain bot solutions: MEV bots, arbitrage bots. 📈 𝐒𝐩𝐞𝐜𝐢𝐚𝐥𝐢𝐳𝐞𝐝 𝐢𝐧 𝐃𝐞𝐅𝐢 & 𝐍𝐅𝐓𝐬: 🔥 Build platforms like DEXs, launchpads, and crowdfunding systems. 🔥 Develop NFTs with royalties, whitelist, dynamic metadata, and more. 💻 𝐓𝐞𝐜𝐡𝐧𝐨𝐥𝐨𝐠𝐢𝐞𝐬 & 𝐒𝐤𝐢𝐥𝐥𝐬: 👉 Languages: Solidity, Rust, Python, JavaScript, TypeScript, Go, C++ 👉 Frameworks: React.js, Next.js, Vue.js, Django, Express.js, Truffle, Hardhat 👉 Databases: MongoDB, MySQL, PostgreSQL, Firebase 👉 Platforms: Ethereum, Solana, Binance Smart Chain, Polygon, Avalanche, Tron 👉 Tools: Docker, Kubernetes, AWS, Terraform, Alchemy, Brownie ☑️ Blockchain: Solidity, Web3.js, Ethers.js, Truffle, Hardhat, IPFS, Ethereum, Hyperledger, Solana, Binance Smart Chain, Polkadot, Smart Contracts, ERC-20, ERC-721, ERC-1155 ☑️ AI/ML: Python, TensorFlow, Keras, PyTorch, OpenCV, Scikit-Learn, Natural Language Processing (NLP), Computer Vision, Deep Learning, Machine Learning, Data Science, Pandas, NumPy, Jupyter Notebook ☑️ Mobile Development: Native applications using SwiftUI, Swift (iOS), and Kotlin (Android), and hybrid development with React Native, Flutter, and Ionic. 🚀 𝐍𝐨𝐭𝐚𝐛𝐥𝐞 𝐀𝐜𝐡𝐢𝐞𝐯𝐞𝐦𝐞𝐧𝐭𝐬: 🌟 Developed an NFT marketplace with multi-chain capabilities (Ethereum & Solana). 🌟 Built DeFi protocols with staking and liquidity mechanisms, optimizing gas fees by 30%. 🌟 Created cross-chain bridges connecting major blockchain ecosystems. 🌟 Contributed to $10M+ funding raised for blockchain startups. 💬 𝐋𝐞𝐭’𝐬 𝐂𝐨𝐥𝐥𝐚𝐛𝐨𝐫𝐚𝐭𝐞! Click the "Invite to Job" button to start your blockchain journey today! Together, we’ll craft the future of decentralized solutions. 🌐✨ How do we communicate and report? We always prefer to keep our work transparent, and for this reason, we like to be in touch with our valued clients on a daily, weekly & monthly basis. ✅ Upwork Message Board ✅ JIRA ✅ Azure DevOps Server ✅ Asana ✅ Trello ✅ Zoho Projects

I help established businesses leverage artificial intelligence models to reduce manual work, enhance productivity, streamline workflows, and reduce operational overhead. I have generated $900k+ on Upwork advising clients across technology, crypto/Web3, fintech, product strategy, and go-to-market execution. Today, my work is focused on AI consulting, AI workflow automation, internal AI systems, and AI-enabled business strategy. I help companies identify where AI can create real leverage — then design, implement, test, and refine systems around those opportunities. ## What I Can Help With - AI strategy and implementation roadmaps - Workflow automation and operational optimization - AI agents and internal business tools - Custom GPTs and AI-powered knowledge systems - RAG systems grounded in company data, documents, policies, and workflows - AI research, summarization, and decision-support tools - AI-powered client onboarding, employee training, and internal support systems - AI-assisted financial, legal, operational, and market research workflows - AI product strategy for startups and technology companies - Crypto/Web3 strategy, token launches, token economics, and emerging-tech advisory AI is not just about simple task automation. Used correctly, it can help evaluate complex financial transactions, summarize large document sets, surface key business risks, support acquisition analysis, train new employees, and dramatically reduce the time required to make informed decisions. ## Model & Technology Options Depending on your needs, budget, privacy requirements, and technical environment, I can help implement solutions using: - Cloud-based frontier models such as ChatGPT, Claude, Gemini, and other leading AI platforms - Open-weight models such as Llama, Mistral, Qwen, DeepSeek, and others - Locally hosted or private-cloud AI deployments - Vector databases and retrieval-augmented generation systems - Chat-based interfaces for employees, clients, or internal teams - Workflow tools, APIs, and integrations with your existing software stack ## Why Work With Me I am the co-founder and President of a Los Angeles-based, 70-person emerging-technology company that has built mobile apps, blockchain products, AI systems, and digital products for startups and globally recognized companies. My background combines technical strategy, product development, emerging technology, fundraising advisory, go-to-market execution, and high-level consulting. I have consulted for the largest clients in the world including Apple, L'Oreal, Nike, Beats by Dre, Toyota, and Red Bull. I am also deeply involved in the AI ecosystem and have invested in category-leading technology and AI companies, including Prometheus, Decart, Ramp, xAI, SpaceX, and Groq. If you are looking for someone who can help you understand what AI can actually do for your business — and then turn that into a practical, working system — I would be happy to discuss your goals.

I am a professional blockchain developer with expertise in Solidity and Rust, along with frameworks such as Truffle, Hardhat, and Foundry. Additionally, I have strong knowledge in full-stack development, specializing in Node.js and Next.js. In terms of experience, I have successfully completed several projects and have worked onsite with multiple reputable companies as both a blockchain and full-stack developer. This exposure has given me a deep understanding of client requirements. I excel at analyzing client needs and providing efficient, tailored solutions to meet project goals effectively.

I am a Solidity developer with one year of experience building production-grade smart contracts on Ethereum. I specialize in Chainlink integrations, including VRF for fair draws and Automation for seamless execution. My key project, LinShop, is a fully autonomous gamified marketplace that leverages Chainlink technology for a unique user experience, ensuring transparency and fairness. I am proficient in test-driven development with Foundry, and I navigate the deployment pipeline from local development to mainnet verification with ease. If you are looking for an innovative developer who can turn complex ideas into reliable smart contract solutions, let’s connect. I am excited to discuss how I can contribute to your project and help bring your vision to life.

I have been programming for 15 years, studying game programming at university and working at a web / mobile development company for 7 years. I am currently full time freelance, and have been mainly working on blockchain and Ethereum related projects since 2017. I have created all types of smart contract and web3 related projects including decentralised exchanges, blockchain games, custom tokens, defi platforms etc. I am highly experienced with EVM based smart contracts as well as other blockchains such as Solana. Blockchain development: Passionate about Solidity and blockchain development since 2017, transitioned to a full-timme freelance smart contract developer specializing in EVM based web3 projects. Web development: C sharp, ASP.net, SQL, JavaScript. Worked on large projects for clients such as BBC. Mobile development: React native, Xamarin, Objective C, Swift, Java. Over 10 mobile apps in the iOS app store and google play. Game development: C++, OpenGL, DirectX, various engines including a lot of Unity experience. Recently worked on games such as mobile Runescape as well as many indie game projects. SELECTED PAST WEB3 / SMART CONTRACT RELATED PROJECTS • INCDEX - Decentralised exchange based on uniswap v3 with additional farming, liquidity aggregation and token buyback and burn features. • XBridge - Bidirectional token bridge for a new EVM based chain bridging to Binance Smart Chain and Ethereum. • HBSC - Decentralised Banking Platform on Binance Smart Chain with presale token reservation and diverse staking options. • Brainchain - Allowing users to claim rewards by sending data generated from brain computer interface using zero knowledge proofs. • Loanfi - Token backed by gold and RWA verified using Chainlink proof of reserve and platform offering lending and staking. • Gangs around the Globe - NFT collection and on chain game allowing users to battle to increase stats. • Cryptoclash - Mobile app using Augmented Reality to find mini games and win cryptocurrency in real world locations. • Everdragons - Fully on chain gold mining game allowing users to upgrade mining equipment by sending transactions. Turn based strategy grid game. • Hex Lotto - Decentralised lottery game and related gambling mini games. • Blockchain Fortress - Inial coin offering plaorm including custom crowd sale contracts with unique features. • Deploy.gold - Token creation tool allowing users to create ERC20 tokens on various EVM chains with features such as transaction tax. • Smart Contract Auding - Providing full security audits for various smart contracts using automated tools and manual review.

Blockchain Developer specializing in Smart Contracts, DeFi protocols, and Web3 applications. I'm a passionate blockchain developer with expertise in building secure and scalable decentralized solutions. My focus is on creating innovative DeFi protocols, NFT platforms, and smart contract systems that solve real-world problems. What I bring to your project: ৹ Smart Contract Development - Expert in Solidity with a track record of deploying gas-optimized, secure contracts ৹ DeFi Protocols - Built stablecoin systems, DEX platforms, lending protocols, and yield farming solutions ৹ NFT Development - Created full-featured NFT marketplaces with minting, royalties, and IPFS integration ৹ Web3 Integration - Seamless dApp development using Web3.js, Ethers.js, and modern frontend frameworks ৹ Security First - Deep understanding of smart contract vulnerabilities and best practices My approach: I believe in clean code, thorough testing, and clear communication throughout the development process. Whether you need a complete DeFi platform or custom smart contract solutions, I deliver production-ready code that's secure, efficient, and well-documented. Let's build the future of decentralized finance together!