I build polished AI-powered web and mobile products from idea to production. My strongest work is at the intersection of AI agents, backend systems, browser automation, web3, and high-quality product design. I can help you turn rough ideas into fast, beautiful, production-ready apps with strong UX, smooth animations, reliable APIs, and workflows that actually save time. Recent outcomes from my work: - Built an AI-native department management platform used by 200 employees in production - Saved around $10K/year by replacing multiple SaaS subscriptions with custom internal tools - Built sales and cold outreach agents that helped drive $60K ARR growth in 2 months - Created AI workflows across task management, QA, embedded software, production, and operations I can help with: - AI agents and workflow automation - Full-stack web and mobile app development - Beautiful landing pages and frontend experiences - Backend APIs, dashboards, and internal tools - Browser automation and QA systems - Web3 apps, smart contracts, and security workflows - MVPs that feel polished instead of rushed I’ve built through 70+ hackathons, reached 4 ETHGlobal finals, and won $100K+ in web3/AI prizes.

PROFESSIONAL SUMMARY With 8 years of experience, including 6 years in blockchain and extensive 6 years working in Golang and Kubernetes , 4+ years of experience managing teams and operating a 24*7 service. Experience developing roadmaps and prioritizing and executing project.Specializing in both public and private blockchains, DeFi, and data analysis.Skilled in Substrate, EVM, and the development of upgradable smart contracts. Experience with distributed architectures, microservices and working with geographically distributed teams across multiple time zones. Experience working in the Financial Sector,Mortgage Domain,Real State,Insurance,Meteorology,Trading system, Fintech, Edtech platform, E-commerce, Matrimonial. Key strengths and Technical Skills: 1. Programming Languages: • Languages:- C, C++, C#, Java, JavaScript, TypeScript, Python, Golang, Rust, Solidity, Scala, Ruby,PHP, Cairo, Move • Frontend Specific:- HTML, CSS( Tailwind CSS), JSX, XML 2. Smart Contract Development :- • Languages:- Solidity, Cairo, Move • Tools:- Web3.js, Hardhat, Foundry, Solana SDK, Anchor, Parity Substrate, CosmWasm, Near SDK 3. Frontend Development:- • Frameworks/Libraries:- React, React Native, Vue.js, Angular, Redux, jQuery, Yew, Leptos, Dioxus • UI/Design Tools- Material-UI (MUI), Tailwind CSS, Figma • Technologies:-AJAX, Webpack, Vite, Turborepo (Monorepo), Wasm-bindgen, Trunk • Testing:- Jest, Mocha, Cypress 4 Backend Development:- • Frameworks/Libraries:- Node.js, Express.js, NestJS, Ruby on Rails, Laravel, Django (DRF), .NET , Gin, Echo, Actix Web, Rocket, Axum, Tide, Warp, Salvo, Tonic • API Technologies:-REST, gRPC, GrapgQL, WebSocket, Swagger, OAuth, Postman, WebRTC, OpenSSL, SAML, OpenID • Server Management:- Nginx, Gunicorn (WSGI) • Message Brokers:- Kafka, RabbitMQ, AWS Kinesis, AWS SQS • Other:-JWT, Tokio, Hyper, Reqwest 5. Database Management:- • Relational Databases:- PostgreSQL, Oracle, MariaDB, Supabase (PostgreSQL based), SQLx, Diesel • NoSQL Databases:- MongoDB, DynamoDB, Cassandra, Redis, TimescaleDB, MongoDB Rust Driver • Data Warehouses:- Snowflake, Pinot, Redshift • Caching:- Redis, Memcached • Query Language:- GraphQL 6. Cloud Platforms and Serverless:- • Cloud Providers:-AWS ( EC2, S3, API Gateway, Route 53, SNS, SQS, Lambda, Step Functions),AZure, Google Cloud Platform (GCP), Digital Ocean, GoDaddy, Vercel 7. DevOps and CI/CD:- • Version Control:- Git, GitHub, Gerrit • CI/CD Tools:- Jenkins, CircleCI, GitHub Actions, Octopus Deploy • Containerization:- Docker, Podman, Kubernetes, AWS EKS, AWS ECS, Helm • Infrastructure as Code:- Terraform, Pulumi, Ansible • Other Tools:- Celery, XPath, Cargo, Cross, Rustup, Shuttle, Cargo-Deny 8. Data Structure & Algorithms:- • Data Structures:- Array, List, Stack, Queue, Tree, Graph • Concepts:- Object-Oriented Programming (OOP), Concurrency, Multi-threading 9. Blockchain & Web3:- • Hyperledger Fabric, Ethereum, Solana, Substrate, EVM, Smart Contracts, IPFS, Chainlink, The Graph, Superfluid, 0*Splits 10. Machine Learning & Data Processing: • Frameworks/Libraries: TensorFlow, PyTorch, OpenCV, scikit-learn, MLflow, Apache Spark, LangChain, Rust-Polars, Linfa, Arrow, Rust-Bio. • Web Scraping:- Scrapy, Selenium, BeautifulSoup • PDF Processing:- PyPDF2, Apache PDFBox • OCR:-Tesseract • Search and Analytics:- Elasticsearch, Solr, ELK stack • Workflow Orchestration:- Apache Airflow 11. Monitoring and Observability:- • Tools:- Prometheus, Grafana, OpenTelemetry, Jaeger, Datadog, New Relic, Loki, AWS CloudWatch, Azure Monitor, Sentry, Tokio Tracing • Concepts:- Logging, Metrics, Distributed Tracing 12. Testing and Code Quality:- • Testing Frameworks:- Jest, Mocha, Cypress, Pytest, Chai, TestNG, Vitest, JUnit, Playwright, SpecFlow • Code Quality Tools:- SonarQube, Code Linting ( ESLint, Prettier,Stylelint), Code Coverage, Rustfmt 13. Software Architecture and Design Pattern:- • Architecture Patterns:- Microservices, Event-Driven Architecture, Monolithic Architecture, Service-Oriented Architecture (SOA), Serverless Architecture • Design Patterns:- MVC, MVVM, Singleton, Factory, Observer, Decorator, Strategy • Related Concept:- Domain-Driven Design (DDD), CQRS, SOLID Principles • Experience in third party integrations ( Stripe payments, other API Integrations) 14. Development Methodologies and Tools: • Methodologies:- Agile, Scrum, Kanban, Waterfall, SAFe, Extreme Programming (XP) • Monorepo Tools:- Nx, Turborepo, Lerna, Yarn Workspaces, pnpm workspaces, Bazel, Rush • Scripting:- Shell Scripting, PowerShell, Python Scripting, Bash, Groovy, Perl • Build Tools :- Webpack, Vite, Rollup, Esbuild, Parcel, Gulp, Maven, Gradle

👋 Hello! I’m a seasoned ❤ Senior Blockchain Engineer ❤ with 12+ years of experience in IT engineering, backend development, and cutting-edge blockchain solutions. My expertise spans enterprise blockchain frameworks, smart contracts, decentralized applications (dApps) and layer-2 scaling solutions , with deep specialization in Hyperledger Fabric for permissioned networks. 🚀 Key Skills & Technologies: ✔ Blockchain Development: Hyperledger Fabric (Golang), Ethereum (Solidity), Sui (Move), Polkadot (Rust), Cosmos (Go), Solana (Rust), Avalanche (Go, Solidity), Near Protocol (Rust, AssemblyScript) ✔ Smart Contracts & DeFi: Chaincodes (Golang/Typescript), ERC-20/721/1155/2771/4337, DeFi protocols, Oracles (Chainlink), Zero-Knowledge Proofs (ZKPs) ✔ Web3 & dApps: Web3.js, Ethers.js, Hardhat, Truffle, Foundry ✔ Scalability Solutions: Rollups (Optimistic & ZK), Sidechains, State Channels ✔ Frontend: React/Next.js, Svelte/SvelteKit, TailwindCSS, ShadCN ✔ Backend & DevOps: Node.js, Golang, Rust, Docker, Kubernetes, AWS/GCP, Terraform ✔ Database Optimization: PostgreSQL, MongoDB, Redis, Blockchain indexing (The Graph) 💼 Notable Projects: Contributed to Elrond (EGLD) – High-throughput blockchain with sharding Developed Bread Wallet (BRD) – Leading non-custodial crypto wallet Enhanced CoinPayments – One of the largest crypto payment gateways 🔨 I thrive on building from scratch, optimizing performance, and implementing innovative blockchain solutions with precision. My work is driven by reliability, security, and scalability, ensuring top-tier results on time. 👨‍💻 My areas of expertise include the following: Blockchain Development & Protocols ✔ Ethereum (Solidity – ERC-20, ERC-721, ERC-1155, ERC-1400, ERC-3643, ERC-1337) ✔ Hyperledger Fabric (Enterprise-grade permissioned DLT) ✔ BSC (BEP-20), Polkadot, Cosmos, Solana, Avalanche, Near ✔ Zero-Knowledge Proofs (ZKPs), Optimistic & ZK Rollups DeFi, Trading & Exchange Development ✔ Flash Loan Bots, Arbitrage Bots, MEV Strategies ✔ CEX/DEX Development (Order-matching engines, AMMs like Uniswap/PancakeSwap) ✔ P2P Trading Systems, Liquidity Pools, Yield Farming ✔ Tokenomics & Fundraising (ICO/IDO/IBCO/LBP/IFO Launchpads) NFTs, Gaming & Web3 ✔ NFT Marketplaces (OpenSea-like, Minting platforms) ✔ GameFi (Play-to-Earn, NFT Staking, Smart Contract-based economies) ✔ Web3.js, Ethers.js, The Graph, IPFS Security & Infrastructure ✔ Smart Contract Audits (Slither, MythX, Manual Review) ✔ DevOps & Node Deployment (AWS/GCP, Kubernetes, Docker) ✔ Mining & Validator Nodes (PoW/PoS Networks) Languages & Frameworks ✔ Rust (Solana/Polkadot), Golang (Cosmos, Hyperledger), Python (Web3, Bots) ✔ ReactJS, Svelte, Node.js, Hardhat, Foundry 💻 Throughout my career, I have worked with various platforms and technologies such as AWS, Pingdom, Datadog, Git, CLI, Ansible, and Apache. I am also well-versed in commonly used tools and platforms like Remix IDE, Geth, Parity, Web3.js, Ethers.js, and Infura. 🚀 With my expertise and experience, I am confident in delivering stability to your applications. If you are seeking a reliable, skilled, and responsible blockchain engineer, look no further. I am the right professional for the job! Thank you for considering my profile, and I look forward to the opportunity of contributing to your projects. ---------------------------- #BlockchainFundamentals, #Ethereum, #rpc, #grpc, #p2p, #node, #java, #go, #smartcontract, #aws, #kubernetes, #k8s, #hyperledger, #hyperledgerfabric, #fabric, #besu, #hyperledgerbesu, #corda, #chaincode, #solidity, #evm, #ethereum, #quorum, #docker, #dockercompose, #swarm, #ConsenSysQuorum, #dockerswarm, #compose, #POW, #Proofofwork, #Proofofstake, #mining, #ravencoin, #raven, #meowcoin, #meow, #hyperledgerfabricexplorer, #chaincode, #POS, #KAWPOW, #rust, #go, #golang, #solidity, #consensus, #C, #C++, #erc-20, #blockchainarchitecture, #blockchain, #healthcare, #financial, #solution, #hipaa, #fhir, #sui, #move, #enterprise, #Proof of Work, #Proof of Stake, #Proof of History, #go, #golang, #typescript, #rust, #javascript, #C, #C++, #ERC-2771, #ERC-4337, #AWS EKS, #fireblocks, #biconomy, #gasless transaction, #paymaster, #OpenZeppelin, #OpenZeppelin Defender, #hyperliquid, #hyperliquid EVM, #EIP-918, #zero-knowledge proof, #ZKP, #BullX, #Axiom, #ZK-proofs, #BitGo, #OSL Custody, #Copper, #Liminal, #Safeheron, #Cobo, #Vaultody

👋 Hi, there!, I am Lazar - Your Full Stack | Blockchain Developer! Thank you for stopping by my profile! If you are looking for someone to take your project to the next level, you are in the right place. With over several years of experience and a genuine passion for technology, I am dedicated to delivering innovative solutions tailored just for you 🚀 What I Can Do for You I specialize in creating responsive, dynamic websites and applications using the latest technologies. Whether it's building a sleek front-end with React or Angular or developing a robust back-end with Node.js or PHP, I am always ready. 🛠 My Tech Skills: ✅ Blockchain: Smart Contract/Solidity/Rust, Ether.js, Solana/Web3, CCIP, CCTP, DeFi ✅ Frontend: HTML, Javascript/Typescript, CSS3/TailwindCSS, React/Redux/Saga, Next.js, Angular, TypeScript/Javascript, MUI ✅ Backend: Node.js, Express.js, NextJS, PHP, Python, Laravel, CI, ✅ Database: MongoDB, MySQL, PostgreSQL, Firebase ✅ Mobile Development: React Native, Flutter ✅ Cloud & DevOps: AWS, Digital Ocean, Docker ✅ Version Control: Github/Gitlab 🚀 Why Work With Me? ✅ Problem Solver: I love tackling challenges and finding creative solutions. ✅ Full-Cycle Development: From idea to launch, I handle every step of the process. ✅ Quality Focused: I ensure clean, efficient code and thorough testing for bug-fee results ✅ Timely Delivery: I respect deadlines and keep your project on track. 🤝 Let's collaborate! Whether you need a custom website, a mobile app, or anything in between, I am here to help bring your vision to life. Don't hesitate to reach out, let's create something amazing together!

I’m a developer experienced in building software for big and medium-sized businesses. I was a crypto entrepreneur for the last 3 years and my business was featured in leading US media: The New York Times, The Wall Street journal, Bloomberg, and WIRED - Knows a lot of programming languages and can easily learn new ones and adapt to your needs - Full project management from start to finish - Regular communication is important to me, so let’s keep in touch.

Hello! I hope we can work together soon. I am a former English teacher with 3 years of experience teaching writing, proofing and providing feedback on works in progress. My BS in English: Creative Writing and Secondary Language Arts Education have served me well in providing quality constructive feedback on writing of all genres. Whether you need new written content for SEO or a review of what you have already produced, I am your guy. • Well versed in word processing tools including Scrivener, Microsoft Word, and Google docs including change tracking and comment tools. • Quality, helpful, timely and constructive feedback. • Detail oriented and flexible to meet specific editing and proofing needs.

I have a Bachelor's in Intradisciplinary Psychology from the University of Illinois at Urbana-Champaign. I am interested in being a front-end or full-stack engineer in a fast-paced team that likes using new and effective tools for their infrastructure. I have skills in full-stack development, data analysis/visualization, and financial risk management: - Programming and Markup Languages: TypeScript/JavaScript, Python, HTML, CSS/SCSS, Rust - Cloud: AWS EC2, Valkey/Redis, AWS ECR, AWS WebSockets, AWS Lambda, AWS Parameter Store - Web Development: React.js, Next.js, Apollo Client/Server, Auth0 - Databases: AWS DynamoDB, PostgreSQL, MySQL, GraphQL, MongoDB - Tools: Git, GitHub, GitLab, Docker - Deployed websites on: Netlify, GitHub pages, Vercel, and IPFS - Options hedging (Risk-Neutral Valuation and Actuarial Valuation, Greek Hedging and Dynamic Hedging) - Value-at-Risk (VaR: Historical Simulation (w./w.o. weighted observations) and Expected Shortfall) - Swaps (Currency and Interest Rate Swaps (Covered Interest Parity)) - Futures (Basis Hedging, Commodity Cash-and-Carry)

AI Engineer specializing in building production-grade AI products. I've developed AI chatbots, voice agents, semantic search engines, reverse image search systems, virtual try-on solutions, content moderation pipelines, and custom LLM applications used by thousands of users. From prototype to production, I handle the complete AI stack—data, models, APIs, infrastructure, and deployment. My goal is simple: ship reliable AI solutions that improve user experience, automate workflows, and drive business growth.

As a blockchain developer with 3 years of experience, I have a strong understanding of the fundamentals of blockchain technology, including its architecture, consensus mechanisms, and smart contract development. I specialize in developing decentralized applications (dApps) using blockchain technology and have experience working with a range of blockchain platforms, including Ethereum, Hyperledger, Binance and Solana. During my time as a blockchain developer, I have worked on several projects, including developing smart contracts for supply chain management, implementing blockchain-based voting systems, and creating a decentralized marketplace for digital assets. I have also contributed to open-source blockchain projects and have experience working with blockchain APIs, wallets, and nodes. My technical skills include proficiency in Solidity, JavaScript, TypeScript and Go, as well as experience with blockchain tools such as Foundry, Hardhat, Ganache, Remix, and Ether.Js, Web3.js. I also have experience with DevOps tools such as Docker, Kubernetes, and Git. In addition to my technical skills, I am a strong communicator and a team player. I am comfortable working in an agile development environment and am committed to delivering high-quality code that meets project requirements and deadlines. If you're looking for a blockchain developer with experience developing dApps and working with a range of blockchain platforms, I would be happy to discuss your project and see how I can help.

I'm Brent— I build AI agents that live on your website and talk to your visitors. Not chatbots. Not widgets. Dedicated AI agents trained exclusively on your content — deployed on global edge for sub-100ms load times worldwide My flagship service is the AI Portfolio Agent: a voice-powered interactive portfolio where visitors ask questions and your AI guide answers from your actual work. Production-grade AI development (not prototype) and real-time voice AI. Every deployment is isolated infrastructure — your agent only knows your data Every project I deliver is a live demo of what I build. Ask me for links. Let's talk about your problem.