Delivering Clean, Secure, and Audited Web3 Solutions (EVM + Solana) Hi, I'm a blockchain developer with hands-on experience building and fixing DeFi protocols, smart contracts, and dApps on Ethereum, BNB Chain, Polygon, Arbitrum, and Solana. I focus on solving real-world problems—from broken smart contract logic to protocol-level vulnerabilities—and ship clean, production-ready code backed by testing and optimization. ✅ My Specializations: Smart Contracts (Solidity, Rust/Anchor) DeFi Protocols (AMMs, staking, lending, bonding) Tokenomics (ERC-20, SPL, deflationary mechanics) Full-Stack dApps (React, Next.js, Ethers.js, Wagmi) Security Audits, Gas Optimization, Cross-chain Integration 🔧 Real Problems I’ve Solved: 1. Fixed Critical Approval Bug in Staking Contract (Ethereum) A client's staking dApp allowed users to stake ERC-20 tokens, but users’ allowances were being reset unexpectedly. 🔍 Cause: approve() was used instead of increaseAllowance() inside a loop. ✅ Fix: Refactored the logic to use safeIncreaseAllowance, added unit tests, and resolved user complaints and loss of funds. 2. Gas Optimization for High-Traffic DeFi Platform (BNB Chain) The protocol was spending 30–40% more in gas during reward distribution due to inefficient state updates. 🔍 Cause: Unoptimized for loops and redundant SSTORE operations. ✅ Fix: Implemented mapping structures with snapshots and indexed events. Gas cost was reduced by ~42%. 3. Solana Escrow Contract Failure Resolved (Rust + Anchor) The client’s escrow program for a token sale was failing on mainnet when more than 100 users interacted. 🔍 Cause: PDA seeds were inconsistent between deposit and claim phases. ✅ Fix: Standardized PDA derivation logic, added Anchor #[account] constraints, and migrated accounts. Program passed Anchor tests and was successfully deployed. 4. Cross-Chain Token Bridge (Arbitrum ⇄ Ethereum) Implemented cross-chain token swap logic for a DeFi app using LayerZero and Circle CCTP. ✅ Enabled real-time asset transfers with status confirmation, including UI/UX integration and failover fallback handling. 5. Flash Loan Guard for Lending Protocol (Polygon) After noticing arbitrage bots exploiting the borrow logic, I added a flash loan guard to prevent reentrancy and front-running. ✅ Verified using Foundry tests, simulated attack patterns, and published an internal audit report. 🛠 Tech Stack I Use Daily: Solidity, Foundry, Hardhat, OpenZeppelin Rust, Anchor, Solana CLI Ethers.js, Viem, Wagmi, Web3.js React, Next.js, Tailwind, Zustand The Graph, Chainlink, LayerZero, IPFS If you're building a DeFi app, NFT utility platform, or just need someone to fix a critical blockchain issue without excuses, let’s talk. 📩 Shoot me a message. I don’t just deliver code — I deliver solutions.

Hey, My self Abdul-Raheem, a computer Scientist, I am an experienced Full Stack Developer PHP and AI/ML Engineer with expertise in Next.js React.js, Node.js, Python, TypeScript, HTML, and JavaScript, helping startups and enterprises build scalable web applications, SaaS platforms, MVPs, and AI-powered solutions. My expertise spans frontend development, backend development, API development, cloud, and AI/ML integration, ensuring end-to-end delivery from concept to deployment and ongoing support. I have successfully delivered projects across multiple countries, consistently achieving top client satisfaction through high quality development, secure architecture, and on time delivery. 🔹 Full Stack Development Expertise: Frontend Development: React.js, React JS, Next.js, Vue.js, Angular, JavaScript, TypeScript, HTML5, CSS3, Tailwind CSS, Bootstrap, jQuery, Telerik Backend Development: Node.react, Express.js, NestJS, PHP, Laravel PHP Developer, Django (Python), Flask, FastAPI, Java, Spring, Ruby on Rails, Golang, Rust, C++, Nuxt.js, Fastify, Django Backend Engineer API Development & Integration: REST API, RESTful API, GraphQL, gRPC, OpenAPI, WebSockets, Microservices, API Authentication (JWT/OAuth), Third-Party Integrations (Stripe, PayPal, Google APIs) Databases & Data Management: MySQL, PostgreSQL, MongoDB, Firebase, Supabase, Redis, BigchainDB, SQL Cloud & DevOps Expertise: AWS (Lambda, EC2, S3, CloudFront, SageMaker), Microsoft Azure, Google Cloud Platform, Oracle Cloud, Alibaba Cloud, Docker, Kubernetes, Terraform, CloudFormation, CDK, GitHub Actions, Jenkins, CircleCI, Ansible, Nginx, IIS Other Expertise: Hybrid App Development, Legacy Modernization, User Identity Management, Git, Jira, Web Design, WordPress Blockchain: Ethereum, Solana, Solidity, Smart Contracts, Chainlink, DeFi, DEX, Web3.js, Ethers.js, Hyperledger Fabric 🔹 AI & Machine Learning Expertise Generative AI & LLMs: ChatGPT, GPT-4, LLaMA, Claude, Mistral, Falcon, Gemini, LangChain, RAG pipelines, vector databases (Pinecone, Weaviate, FAISS, Milvus, ChromaDB), prompt engineering, AI Agent & AI Bot development. Machine Learning Python & Deep Learning: Predictive models, NLP, computer vision, recommendation systems with TensorFlow, PyTorch, Hugging Face, Scikit-learn, OpenCV. MLOps & Cloud AI: Deploying AI/ML workflows on AWS, Azure, GCP using Docker, Kubernetes, MLflow, SageMaker, Vertex AI for scalable production. AI API Development & Integration: REST API, GraphQL, FastAPI, Flask for connecting AI services to SaaS, web, and mobile apps. 🔹 What I Deliver: Full Stack Development: End-to-end frontend development and backend development with PHP, ht.js, Node.js, Python, JavaScript, ensuring scalable and secure web applications. API Development & Integration: REST API, RESTful API, GraphQL, FastAPI for seamless third-party and internal system communication. Web Application Development: Modern, responsive, and SEO-friendly web apps tailored for startups and enterprises. SaaS Development: Building subscription-based SaaS platforms with secure payment systems and multi-tenant architecture. MVP Development: From wireframes to production ready MVPs, helping startups launch fast and validate ideas. Artificial Intelligence (AI) Development: AI Agent & AI Bot solutions, Generative AI, LLM integration, and Machine Learning Python for predictive analytics, NLP, and computer vision. Cloud Development & DevOps: AWS, Azure, GCP with Docker, Kubernetes, Terraform, CI/CD pipelines for scalable cloud-native applications. Mobile Application Development: Cross platform mobile apps with React Native, Flutter, Swift, and Kotlin. Blockchain Development: Ethereum, Solana, Solidity, Smart Contracts, Web3.js, Ethers.js for DeFi, DEX, and crypto solutions. If you are looking for a proven Full Stack Developer PHP and AI Developer with expertise in React.js, Node.js, Python, JavaScript, API Development, Frontend Development, Backend Development, SaaS platforms, and MVP development with AI/ML integration, let’s connect and make your project a success.

About Me: Hello, I'm Md Imran, a passionate MERN stack developer with a keen eye for crafting dynamic web applications and seamless user experiences. I specialize in delivering high-quality projects that combine technical expertise with creativity to meet client needs. What I Offer: Frontend Expertise: Proficient in React, Bootstrap, MUI, and Redux, I create visually appealing, responsive, and user-friendly interfaces tailored to your audience. Backend Development: Skilled in Node.js and API integrations, I develop robust and scalable backend systems to power your applications. Blockchain Integration: Exploring innovative solutions, I integrate blockchain technology into full-stack projects to enhance security and transparency. Problem Solving: My experience in hackathons and teamwork demonstrates my ability to approach challenges with creativity and precision. My Approach: Tailored Solutions: I focus on understanding your unique requirements to deliver a customized product that aligns with your goals. Timely Delivery: I prioritize meeting deadlines while maintaining the highest standards of quality. Continuous Learning: With a B.Tech in Information Technology, I stay updated on emerging technologies to offer cutting-edge solutions. Why Choose Me: With a track record of developing innovative projects and a commitment to excellence, I bring a blend of technical skills and a user-focused approach. Whether you're building a startup platform, a travel website, or a blockchain-powered solution, I’m here to bring your ideas to life. Let’s connect to create impactful projects that resonate with your audience and drive results! Reach out to discuss your next big idea.

✅ Blockchain development ✅ Solidity ✅ Rust ✅ Smart contracts ✅ Solana ✅ Ethereum ✅ Web3 ✅ NFT ✅ Crypto ✅ ERC-20 ✅ ERC-721 ✅ SPL ✅ React.js ✅ Backend development ✅ API integrations ✅ Web development ✅ PHP ✅ Plugin development ✅ Payment Gateway Integrations ✅ API development ✅ Web applications ✅ Javascript ✅ Mysql ✅ Linux As a Senior Developer with over 20 years of experience and a Master of Information Technology, I bring a wealth of knowledge and passion to every project. My commitment to writing clean, efficient code and doing things the right way ensures top-quality results. I am fully dedicated to each project, striving for 100% customer satisfaction. My self-organization, quick learning, and motivation drive me to seek out and conquer new challenges. Let’s connect and discuss how we can make your next project a success! #blockchain #solidity #crypto #smartcontracts #backend #linux

I am a Solidity developer specialized in building and deploying smart contracts on Ethereum. I design, develop and verify ERC-20 tokens, synthetic assets and DeFi-oriented smart contracts using Hardhat, Ethers.js and modern Web3 tooling. My focus is security, clean architecture and real on-chain deployment. What I Do: · Smart Contract Development (Solidity 0.8.x) · ERC-20 Token Creation & Customization · Synthetic Assets & Oracle Integration (Chainlink-style feeds) · Hardhat Deployment & Verification (Etherscan) · Sepolia & Mainnet Deployments · Gas Optimization & Contract Structuring · Environment configuration (.env, RPC, API keys) Technical Stack: Solidity | Hardhat | Ethers.js | Ethereum | Sepolia | Etherscan | GitHub | Node.js I have hands-on experience deploying and verifying contracts on testnets, handling constructor parameters, oracle feeds, and contract verification workflows. If you need: · A token deployed · A contract verified · A DeFi logic implemented · Help fixing a deployment error · Assistance configuring Hardhat environments I can help. I work with clarity, technical precision, and fast communication. Let’s build something on-chain.

My expertise spans blockchain development, web & mobile app development, and cloud solutions, backed by a proven track record of delivering innovative, scalable, and secure digital solutions across various industries.With over 13+ years of professional hands-on experience, I have established myself as a Top-Rated Freelancer with a ★★★★★ 5-star feedback rating and 100% job success. My Approach & Challenges Open to exploring latest tech stacks like Web3.js, Ethers.js, zk-Rollups, cross-chain bridges, and blockchain interoperability solutions. Passionate about solving complex challenges such as scalability of blockchain networks, secure decentralized mining pools, and interoperability across heterogeneous blockchains. Dedicated to delivering robust, scalable platforms while adhering to best practices in security, performance, and UI/UX design. Blockchain Technologies & Cryptocurrency Expertise Blockchain Platforms & Protocols: Hyperledger Fabric & Explorer, Stellar, Algorand, Solana, Corda, Ethereum Smart Contract & Token Development: ERC20, ERC721, ERC1155, Chaincode, Solidity, Web3.js, Truffle, OpenZeppelin Decentralized Applications (dApps): Design and deployment of NFT Marketplaces, NFT Wallets, NFT Minting Platforms, and digital asset management Layer 2 Scaling & Sidechains: Implementation of Layer 2 solutions such as Rollups (zk-Rollup, Optimistic), State Channels, Plasma, and **Polygon (Matic] for blockchain scalability, interoperability, and high-throughput transaction processing Cryptocurrency & Mining Infrastructure: Expertise in Pool Mining and Merge (Auxiliary Proof-of-Work) mining for secure, decentralized crypto mining pools, supporting Bitcoin, Litecoin, Nano, Ripple, and other POW-based cryptocurrencies. Specialized in setting up decentralized mining pools, hash power sharing, and payout mechanisms—PPLNS, PPS for maximum efficiency and security. Cross-Chain & Interoperability: Polkadot, Cosmos SDK, Chainlink Oracles for blockchain interoperability and cross chains Web & Mobile App Development Full-Stack Web Development: HTML5, CSS3, JavaScript, JQuery, Ajax, AngularJS, React.js, Node.js Backend Development: PHP (Laravel, CakePHP, CodeIgniter), Python (Django, Flask), RESTful API integration, Microservices, Docker & Kubernetes, AWS cloud hosting (EC2, S3, Lambda, CloudFormation) Mobile & Cross-Platform Apps: Native Android (Java, Android SDK), Native iOS (Swift, Objective C), Hybrid Apps (React Native, Ionic, Cordova, Flutter). Skilled in UI/UX design, app mockups, push notifications, media streaming, and AR/VR integrations. Emerging & Modern Technologies: Open to adopting new tech stacks like blockchain SDKs, decentralized identity solutions, cryptocurrency wallet development, machine learning APIs, and edge computing challenges. Cloud & DevOps Cloud Platforms: AWS (EC2, S3, Lambda, RDS, EKS), Google Cloud, Azure, DigitalOcean DevOps & CI/CD: Docker, Kubernetes, Jenkins, Terraform, Helm, CloudWatch, Monitoring, Auto Scaling, Serverless Frameworks Containers & Microservices: Expertise deploying fault-tolerant microservices in cloud-hosted environments with container orchestration. Other Skills & Integrations Payment Gateways: PayPal, Stripe, Authorize.net, Venmo, Braintree, Payleap, P2P Crypto Payments (Bitcoin, Guldencoin, HiveWallet, BreadWallet) Web Services & APIs: XML/JSON, REST, SOAP, Google Maps, Foursquare, GPS, OpenStreetMap Game & AR/VR Content: Experience in 3D content pipeline, AR/VR SDKs (Google Vision, Vuforia), Unity3D, Unreal Engine, and 3D modeling tools like Maya & Blender. If you're looking for a blockchain expert with full-stack web & mobile development experience and a solid understanding of cryptocurrency mining, sidechains, and scalable, secure blockchain architectures, let's connect! I am always excited to embrace new challenges and latest innovations within this dynamic space. Thank you, ~ Karthik

I’m a Web developer experienced in building websites, e-shops, blogs and landing pages for small and medium-sized businesses or individuals . Whether you’re trying to win work, list your services, or create a new online store, I can help and build your project together.

Over the past several years, I’ve helped startups, enterprises, and founders build reliable, secure, and production-ready blockchain applications. I specialize in end-to-end Web3 product development, covering everything from smart contract architecture to full-stack DApp development, wallet integrations, and blockchain-based automation. My work centers on solving real business problems using modern decentralized technologies while ensuring exceptional user experience, security best practices, and scalable architecture. 🔹 𝐖𝐡𝐚𝐭 𝐈 𝐁𝐮𝐢𝐥𝐝: ✔ 𝐒𝐦𝐚𝐫𝐭 𝐂𝐨𝐧𝐭𝐫𝐚𝐜𝐭 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭: -Custom ERC-20, ERC-721, ERC-1155 tokens -Staking, vesting, reward distribution, airdrop logic -Multi-signature governance contracts -DAO mechanisms and voting modules -Liquidity pool interactions (Uniswap V2/V3, SushiSwap) -Token upgradeability (UUPS / Transparent Proxy) ✔ 𝐅𝐮𝐥𝐥-𝐒𝐭𝐚𝐜𝐤 𝐃𝐀𝐩𝐩𝐬 (𝐖𝐞𝐛𝟑 + 𝐀𝐏𝐈 + 𝐅𝐫𝐨𝐧𝐭𝐞𝐧𝐝) -Secure wallet integrations (MetaMask, WalletConnect, Coinbase Wallet) -Transaction dashboards and blockchain event listeners -Real-time blockchain data visualizations -On-chain/off-chain hybrid workflows -Firebase / Supabase / Node.js + Express backends -MERN & React-based front-end apps optimized for Web3 flows ✔ 𝐃𝐞𝐅𝐢, 𝐓𝐨𝐤𝐞𝐧𝐨𝐦𝐢𝐜𝐬 & 𝐂𝐫𝐲𝐩𝐭𝐨 𝐀𝐮𝐭𝐨𝐦𝐚𝐭𝐢𝐨𝐧 -Yield-farming contract interactions -Automated market-making (AMM) integrations -Bridging APIs and cross-chain interaction patterns -Price feed integrations (Chainlink) -Treasury management logic for DAOs 🔹 𝐖𝐡𝐚𝐭 𝐘𝐨𝐮 𝐂𝐚𝐧 𝐄𝐱𝐩𝐞𝐜𝐭 𝐖𝐨𝐫𝐤𝐢𝐧𝐠 𝐖𝐢𝐭𝐡 𝐌𝐞 -Production-ready code with best practices -Clear documentation & deployment guidance -Fast responses & transparent communication -End-to-end development support — from architecture → UI → launch -Reliable long-term availability for updates & scaling 📩 𝐋𝐞𝐭’𝐬 𝐁𝐮𝐢𝐥𝐝 𝐒𝐨𝐦𝐞𝐭𝐡𝐢𝐧𝐠 𝐃𝐞𝐜𝐞𝐧𝐭𝐫𝐚𝐥𝐢𝐳𝐞𝐝 — 𝐚𝐧𝐝 𝐁𝐮𝐢𝐥𝐭 𝐭𝐨 𝐋𝐚𝐬𝐭 Whether you're launching a DeFi protocol, building a full-stack DApp, or need a custom blockchain automation workflow, I’ll help you turn your idea into a secure, scalable product with a polished user experience. If your vision includes blockchain + real-world use cases, let’s talk — this is exactly where I deliver the most value.

⭐ Top Rated | 100% Job Success | 5+ Years Software Engineering | Web3 Since 2022 Blockchain & Full-Stack Web3 Developer specializing in Solidity smart contracts, DeFi protocols, AMMs, and production-grade dApps. 🔹 REAL PRODUCT EXPERIENCE - Buffer.Finance (Crypto Options AMM) — designed dynamic payout in on-chain Buffer Liquidity Pool, boosted monthly BLP profits from 3% → 10% - Phrase.Trade Protocol (Founder) — next-gen NFT protocol for text-based NFTs with on-chain authenticity & anti-duplication logic - Wallet Tracker (Upwork, 5⭐) — "One of the best on Upwork. Highly recommend." 🔹 WHAT I BUILD - Smart Contracts — ERC-20, ERC-721, ERC-1155, staking, vesting, AMMs, options, liquidity pools - DeFi Protocols — options trading, yield mechanics, on-chain payout logic, gas optimization - NFT Systems — minting dApps, marketplaces, royalty logic, metadata & reveal mechanics - Full-Stack Dapps — React/Next.js + ethers.js/wagmi/viem frontends wired to audited contracts - Web3 Tooling — wallet trackers, on-chain analytics, trading bots, indexing with The Graph 🔹 STACK Solidity • Hardhat • Foundry • OpenZeppelin • ethers.js • web3.js • wagmi • viem • RainbowKit • The Graph • IPFS • Chainlink • Slither • Mythril TypeScript • Node.js • Next.js • React • MongoDB • PostgreSQL • AWS 🔹 CHAINS Ethereum • Polygon • BNB Chain • Arbitrum • Base • Optimism 🔹 WHY ME ✅ Shipped production DeFi code used by real traders (Buffer.Finance) ✅ Founder-mindset — I own the problem end-to-end, not just the ticket ✅ Security-first — tested + reviewed before mainnet, gas-optimized ✅ Avg response <4 hrs, 30+ hrs/week available Send your scope — I'll reply with a clear plan + timeline within 4 hours.

Are you looking for a blockchain developer who can turn your Web3 vision into reality? I’m a Full-Stack Blockchain Developer with 7+ years of experience building secure, efficient, and scalable blockchain solutions across Ethereum, BSC, Polygon, Avalanche, Fantom, Tron, Solana, and Hyperledger Fabric. What I Can Build for You: ====================== ✅ Smart Contracts – Secure, gas‑optimized, fully tested (ERC‑20, ERC‑721, ERC‑1155, staking, governance) 🔹 Decentralized Applications (dApps) – User‑friendly React/Next.js frontends & Node.js/Express backends ✅ NFT Marketplaces & Tokenization – Custom ERC‑721/ERC‑1155 minting sites and token ecosystems 🔹 DeFi Protocols – Yield farming, staking, flash loans, lending platforms, AMMs ✅ Web3 Integration – Wallet connect (MetaMask, WalletConnect, Rabby) & on‑chain data feeds 🔹 Blockchain Consulting & Architecture – Guidance on chain selection, scaling, and security design ✅ Smart Contract Audits & Security Reviews – Automated scans (Slither, MythX, Echidna) + manual vulnerability analysis Top Skills & Expertise: ====================== ✅ Solidity Smart Contracts 🔹 Hardhat & Foundry ✅ DeFi Protocols (AMM, Staking, Yield) 🔹 ERC‑20 / ERC‑721 / ERC‑1155 Tokens ✅ React.js / Next.js / TypeScript 🔹 Ethers.js / Wagmi / Web3.js ✅ Smart Contract Auditing 🔹 Slither / MythX / Echidna ✅ Proxy & Upgradeable Patterns 🔹 Blockchain Security Best Practices ✅ Node.js / Express Backends 🔹 CI/CD & Automated Testing Why Choose Me? ====================== 🔹 Proven Experience – Delivered multiple Web3 projects end‑to‑end, from token launches to DeFi platforms ✅ Full‑Stack Capabilities – Seamless integration using Solidity, Hardhat, Foundry, React.js, Next.js, Ethers.js, Wagmi 🔹 Security First – I implement OpenZeppelin libraries, proxy patterns, and best practices to protect your assets ✅ Client‑Centric Approach – Clear communication, transparent reporting, and on‑time delivery