✅ 5+ years of experience ✅ 40+ projects successfully delivered ✅ Proven success with Fortune 120–scale projects Tech-stack: ⁃ Front-End Development: React.js, Vue.js, JavaScript, TypeScript, Tailwind CSS, HTML, Angular, jQuery ⁃ Back-End Development: Node.js, Golang, Rust, C++, Zig, Express.js, Next.js, NestJS, Nuxt.js, Hello! I’m a Senior Full Stack Developer recognized as Expert-Vetted on Upwork, with a strong track record of delivering high-impact solutions for Fortune 120 companies, Silicon Valley startups, and global enterprises. I specialize in building Shopify stores, custom MVPs, and end-to-end Web, Mobile ,Admin dashboards (React + .NET backend), SaaS, AI/ML, Web3, CRM, ERP, and cloud-native applications across diverse industries. I act as a hands-on technology partner, supporting businesses throughout the entire development lifecycle from idea validation and design to deployment and long-term maintenance. I’m genuinely passionate about building powerful software and AI-driven products that help businesses grow. This dedication to excellence has earned me the Expert-Vetted Badge on Upwork, placing me among the top 1% of software development talent visible to enterprise clients. Accomplishments: Certified member of the AWS Partner Network, formally recognized by Amazon a distinction rare among freelancers and agencies, providing access to exclusive resources and best practices. Invited to join Upwork’s Customer Advocacy Program. Delivered projects for Fortune 120 companies and major global brands. If you’ve read this far thank you. I truly appreciate your time. My journey in AI and software development has been both exciting and deeply rewarding, and I’m always eager to help businesses turn their ideas into impactful digital products. Software Development: Full-Stack Development | Shopify | Shopify Apps | Headless | Web and Mobile Development | Web Application | Android | iOS | Custom Web3 dApps | Smart Contract | Crypto Wallet | AI Agent Development | AI Bot | CMS Development | Machine Learning AI/ML | NLP | Data Analytics | ETL | SaaS Development | MVP | Database Architecture | API Development | dApp Development | AWS | GCP | DevOps | MERN | MEAN | LAMP | QA/QC ⁃ Front-End Development: React.js, Vue.js, JavaScript, TypeScript, Tailwind CSS, HTML, Angular, jQuery ⁃ API Integration: RESTful APIs, REST, FastAPI, GraphQL, gRPC, OpenAPI, WebSockets, Microservice Python, Django, Java, Spring, Laravel, PHP, Firebase, Ruby on Rails, Kotlin, Swift, Flutter ⁃ Database Management: MySQL, MongoDB, PostgreSQL, BigchainDB ⁃ Blockchain: Ethereum, Solana, Solidity, Anchor, Smart Oracles, Chainlink, DeFi, DEX, Crypto Hyperledger Fabric, Web3.js, Ethers.js ⁃ Messaging/Queuing: Apache Kafka, RabbitMQ, Amazon SQS, Redis Streams, NATS, Adaptive Aeron ⁃ API Integration: RESTful APIs, REST, FastAPI, GraphQL, gRPC, OpenAPI, WebSockets, Microservice ⁃ AI Integration: Open AI, Claude, Gemini, ChatGPT, Llama ⁃ Machine Learning (AI/ML): AI Agent, AI Bot, Python, TensorFlow, PyTorch, LangChain, OpenAI GPT, FastAPI, Apache Spark, Hugging Face, AWS SageMaker, OpenCV, Vertex AI, RAG, LLM finetune, NLP, ML ⁃ AWS Tools: Lambda, CloudFront, EC2, S3, Kinesis, Kubernetes, Docker, Nginx ⁃ Version Control: Git, GitHub, Bitbucket

I'm a seasoned Fullstack Blockchain and Web3 developer with experience building robust, secure, and efficient blockchain-based solutions. ❓Why Choose Me: 🟢 With a firm grasp of blockchain principles and a knack for innovation, I've successfully crafted and deployed blockchain solutions across various networks, including Ethereum, Polygon, BinanceChain, and Solana. 🟢 I specialize in smart contract development, creating numerous contracts that have powered diverse projects. Whether you need DeFi, NFTs, or custom solutions, I've got you covered. 🟢 My skills extend beyond blockchain, encompassing languages like Solidity, Rust, and JavaScript/TypeScript. I bring a versatile skill set to the table. 🟢 I collaborate closely with trusted friends who share my dedication to delivering top-quality work. This partnership ensures your project stays on track and meets your requirements without delays. Your satisfaction and project success are our shared commitment. 🟢 Complex technical concepts don't intimidate me. I can translate them into clear, understandable language for non-technical stakeholders. Expect regular updates and transparent communication throughout our collaboration.

I’m usually involved when a project needs more than just a frontend and backend multiple users, complex workflows, APIs, payments, real-time data, automation, dashboards and business logic all need to work as one system. That’s where I do my best work. My experience spans Full-Stack Development, SaaS Platforms, Enterprise CRM Systems, FinTech & Trading Technology, AI Agents & Automation, API Integrations and Blockchain/Web3. I work across the complete product lifecycle, from understanding the architecture and database structure to building the frontend, backend, integrations and deployment. ⚡ Core Expertise 💻 Full-Stack Development: React.js • Next.js • JavaScript • HTML5 • CSS3 • Tailwind CSS • Bootstrap ⚙️ Backend & Enterprise Systems: Node.js • Express.js • Python • C# • .NET • PHP • Laravel • REST APIs • WebSockets • WebRTC I use Python and .NET/C# particularly for backend services, enterprise applications, CRM systems, APIs, automation and integration-heavy platforms. 🗄️ Databases & Cloud: PostgreSQL • MySQL • MongoDB • AWS • Microsoft Azure • Google Cloud • Docker • Render • Railway • GitHub 🤖 AI Agents, Bots & Automation: AI Agents • AI Chatbots • Workflow Automation • LLM Integrations • RAG-based Applications • AI Assistants • Tool/API Calling • Multi-Agent Workflows • CRM Automation • Business Process Automation I can connect AI agents with existing **CRMs, databases, business APIs, communication systems and internal workflows**, rather than keeping AI as a standalone chatbot. 📊 FinTech & Trading Technology: Forex CRM • MetaTrader 5 / MT5 Integrations • Trading Accounts • IB & Partner Systems • Commission Engines • KYC • Financial Dashboards • Real-Time Trading Data • WebSockets • Trading APIs ⛓️ Blockchain & Web3: Solidity • Ethereum • BSC • TRON • Web3.js • Ethers.js • Hardhat • IPFS • MetaMask • WalletConnect • ERC-20 • ERC-721 • ERC-1155 • BEP-20 • Chainlink • The Graph 🚀 What This Experience Looks Like in Practice 🚌 Bus Booking & Operations Platform: A complete customer, admin and driver ecosystem covering bus search, seat booking, payments, e-tickets, routes, schedules, passenger boarding, trip management and revenue operations. 🎓 White-Label SaaS LMS: A multi-tenant learning platform where universities can launch their own branded LMS with custom domains, courses, instructors, students, subscriptions, payments, SSO and integrations with Zoom, Microsoft Teams, LiveKit, CRM, ERP and other services. 📈 Forex CRM & MT5 Ecosystem: Broker technology covering MT5 integrations, trading accounts, live trades, IB management, commissions, referrals, KYC, reporting, exposure monitoring, permissions and real-time financial dashboards. ⛓️ Blockchain & Web3 Products: Worked across multi-chain token platforms, crypto wallets, smart contracts, blockchain infrastructure, NFT marketplaces, cross-chain functionality and transaction monitoring. 🧩 Where I’m a Strong Fit: I’m particularly suited to projects involving: SaaS & Multi-Tenant Platforms • Enterprise CRM • FinTech • Forex/MT5 • AI Agents & Automation • Complex Dashboards • API Integrations • Real-Time Applications • LMS • Booking Platforms • Payment Systems • Blockchain & Web3** My approach is simple: understand the, users, workflow, data, integrations and business logic first: then build the technology around it. If you’re building a serious product and need someone who can understand both the technical architecture and the complete business workflow, let’s discuss it.

With 10+ years of experience as a Full-Stack Blockchain Developer, I specialize in building secure, high-performance Blockchain, AI and Web & Mobile app solutions. I prioritize clear communication, timely delivery, and a deep understanding of each client’s goals. My Core Strengths: ✓ Blockchain Development: Smart contracts, NFTs, DeFi platforms, DEXs, token launchpads (IDO/ICO), crypto trading bots, and Tele mini apps ✓ Web Development: Expertise in Node.js, React, Nest.js, MongoDB, MySQL, PHP, and HTML/CSS ✓ AI & Automation: AI-driven tools, Tele bots, trading automation, and task optimization I’m excited about the opportunity to collaborate with you and bring your ideal products to life. Feel free to reach out anytime. Thank you for your time and consideration. Best Regards, Loi Phan

With over 5 years of experience in the international startup ecosystem, I specialize in building robust, scalable products from the ground up. I am a language and framework agnostic engineer who prioritizes using the right tool for the job without ever compromising on technical integrity. I began my career in 2019 translating high-level AI research papers into functional products. Since then, I have architected facial recognition systems, image processing pipelines, and LLM-based regulatory software for fintech startups across Europe and Asia. Since the early 2020s, I have been a core contributor to the DeFi space. I started out designing yield farming algorithms and loan regulatory software for Nord Finance. I joined BankX in late 2021 as the lead developer back when it was still just a white paper and a set of technical requirements. I built the entire protocol ecosystem from scratch and successfully navigated multiple audits from audit firms like CoinFabrik and Immunefi. The protocol is currently live on 8 different chains including PulseChain. In August 2024, I co-founded CtrlBit- A SaaS infrastructure platform for Mikrotik network management. The platform is live and handles centralized monitoring, zero-touch provisioning and secure remote access for global ISPs and enterprises at a fraction of the price. I don't just write code; I build sustainable businesses. I am financially literate, MTCNA certified and experienced in bridging the gap between complex engineering and market-ready solutions. I am currently on the lookout for innovative projects that require high-level technical leadership. Message me for a consultation. I am generally available during PST and UTC business hours.

👋 Hi, I'm Barnabas — a Solidity developer with a sharp focus on building secure, gas-efficient smart contracts using Foundry. I help Web3 teams develop, test, and deploy contracts that are not only production-ready, but optimized for performance and clarity. My toolkit includes Foundry for advanced testing and scripting, and Chainlink for powerful oracle integrations. 🔧 What I can bring to your project: 🛠️ Custom smart contracts (ERC-20, ERC-721) 📐 Modular, maintainable, and gas-optimized architecture 🧪 Foundry test suites: unit, fuzz, mocks, forked mainnet testing 🚀 Deployment and verification scripts with Foundry 🔗 Chainlink VRF and price feed integration 💡 Whether you're launching a token, integrating randomness with Chainlink, or need deep contract testing before mainnet — I’m here to help ship code that performs. Let’s build something great, together.

I build on-chain settlement infrastructure in Rust and Solidity — oracles, confidential compute workflows, and the verification layer that decides whether a settlement should execute at all. WHAT I'VE SHIPPED Chainlink Prediction Settler — a settlement system using multi-model consensus as an oracle. Two independent LLMs evaluate a prediction statement, a Federated Byzantine Agreement engine (Stellar's protocol, implemented in Rust) computes quorum intersection, and settlement executes on-chain only if they agree. On disagreement, autonomous settlement is blocked and human review is triggered. - PredictionMarket.sol deployed to Ethereum Sepolia at 0xEA856dF995C58DEc18221C907DC221c4487Ae499 — source verified on Sourcify, Blockscout and Routescan. - Three Chainlink CRE workflows running on DON: – FBA consensus oracle with API keys managed at DON level via CRE secrets – Privacy-preserving batch settlement: recipient addresses and amounts never touch chain, only a keccak256 batch hash is recorded – DeFi market intelligence across 229 Hyperliquid perpetual markets via CRE Confidential HTTP - Rust CLI, Solidity contracts, MIT licensed, CI green, demo video and writeup published. GitHub repo:- tenalirama2005/chainlink-prediction-settler I also placed five agent systems on Berkeley RDI's AgentBeats leaderboards — #1 on Pi-Bench, #2 on FieldWorkArena, plus CyberGym, OSWorld-Verified and NetArena. The Pi-Bench entry is a Rust/Axum agent (97.8% Rust) scoring 90.1% on policy compliance across FINRA AML, retail refund SOP, and privileged-access workflows. WHY SETTLEMENT SPECIFICALLY Before this I spent thirty years building the systems banks and insurers use to move money — policy administration, retail deposits, enterprise general ledger, and reinsurance treaty reporting, in IBM Assembler and COBOL for US and Canadian financial institutions. That's why my on-chain work is preoccupied with what happens when the oracle is wrong, when parties disagree, and when a settlement should be refused rather than executed. In regulated finance those questions are the job. Most people arrive at Web3 from the protocol side and learn settlement afterwards. I came the other way. WHAT I CAN HELP WITH - Chainlink CRE workflows, oracles, and confidential compute - Rust backend and systems development (Axum, Tokio, CLI tooling) - Solidity smart contracts and settlement logic - Privacy-preserving settlement patterns (commit-hash, off-chain compute) - DeFi data integration and market-data pipelines - RWA and insurance-linked settlement design HOW I WORK Milestone-based, escrow-funded, with the scope written down before I start. I'll tell you early if an approach won't survive an audit — after three decades in systems where errors are financially consequential, I'd rather lose a week to design than ship something that settles wrong. Available 30+ hrs/week with strong US overlap.

Hello there, I'm Shib, a seasoned professional with more than 3 years of expertise in SEO, content creation, and digital marketing. My specialization lies in White Hat SEO techniques, Search Engine Marketing (SEM), Web Traffic optimization, Local SEO, and proficiency in constructing High Authority Backlinks. My approach is dedicated to achieving client satisfaction through organic and effective strategies. I am confident that your experience working with me will be exceptionally positive.

I build production-grade blockchain systems - smart contracts, security audits, and the full-stack apps (SaaS, dashboards, admin panels) around them. By Numbers: - 200+ smart contracts written and deployed (Solidity/Foundry on EVM, Rust/Anchor on Solana) - 3,500+ automated tests across my protocols (unit, integration, invariant/fuzz) - 20+ full production builds shipped end-to-end contracts, frontend, backend, and deployment What I do: --- Smart Contract Development & Security Lending protocols, staking/yield vaults, DEXs, prediction markets, escrow systems, DAOs - on both EVM (Solidity/Foundry) and Solana (Rust/Anchor). I write defense-in-depth contracts: overflow-safe math, reentrancy guards, oracle manipulation protection, rate limiting, circuit breakers, two-step admin transfers. --- Security Auditing I run structured audits - threat modeling, invariant testing, adversarial scenario analysis, PoC exploits - and deliver clear, actionable findings reports (severity-ranked, with remediation). I've built and used my own static-analysis tooling (Slither-based) to catch bug classes most manual reviews miss, including EIP-7702 delegate-contract vulnerabilities. --- SaaS Products I build complete SaaS platforms end-to-end: auth (OAuth/Better Auth), billing, multi-tenant architecture, Postgres/Prisma data layers, and CI/CD. If you need an idea turned into a real, working, billable product not a prototype.....this is what I do. --- Dashboards & Admin Panels Real-time analytics dashboards, protocol risk monitors, portfolio/position trackers, admin control panels, wired to live on-chain data (The Graph, direct RPC, multicall) or off-chain databases. Clean UX, fast load, accurate data, no filler charts. --- Tech stack: Solidity, Rust/Anchor, GO, Python, Foundry, Hardhat, TypeScript, Next.js,JavaScript, Node.js, The Graph, PostgreSQL/Prisma, Chainlink, wagmi/viem, Tailwind CSS, Webhooks,Express --- How I work: Clear scoping before I write a line of code, frequent updates, test coverage on everything I ship, and documentation good enough that another dev (or auditor) can pick it up without me. I treat every project like it might hold real user funds, because eventually, it will. Let's talk about what you're building.

Proficient in web3/smart contract development on ethereum and polygon. Have worked with javascript,typescript, react, redux, node,express,mongodb, Tailwindcss,Mantine, Solidity,Web3js, Etherjs, Wagmi, Rainbowkit,Hardhat,Chainlink,Foundry. Strong proficiency in gas optimization. I've built a nft renting protocol, which won pool prize in Lumos Lab hackathon. I also participated in ETHForALL hackathon, where i made Trustmarket(data marketplace in fevm). I also made a web3 job board call pepejoboard. I've built dex called araswap, v2 contract(araswapv2). I built a evm execution context in C++. I've built Bundleswap which aggregates token swap request to reduce transaction cost while swapping on a dex. I'm also actively researching in Defi, L2, Zk technologies.