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  •     olegkovelsky
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    olegkovelsky olegkovelsky

    United States 100$ USD / saat
    Full Stack | React / TypeScript / Node / AWS
    United States
    BIO: This is Oleh Kovelsky, Texas based web developer with 10 years of experience, specializing in high quality SPA & Hybrid development. I have experience working as an individual developer and sometimes a team cooperator in many projects providing me with the skills of communicating with clients to satisfy their...
    BIO: This is Oleh Kovelsky, Texas based web developer with 10 years of experience, specializing in high quality SPA & Hybrid development. I have experience working as an individual developer and sometimes a team cooperator in many projects providing me with the skills of communicating with clients to satisfy their needs. Background: --------------- ➤ 6+ years experience developing for Web, Windows Desktop and Mobile Platforms. ➤ 4+ years project management experience. ➤ 8+ years of experience working directly with clients. ➤ Strong sense of project and time management. ➤ Ability to work with little supervision or as part of your team. ➤ Strong and Clear communication skills -------------------------------------------------------------------------------------------------------- Developer: -------------- Not only as one-time contractor, but also as a reliable, capable business partner and technical assistant with long-term relationship, I would suggest potential improvements for the software product by catching upon the critical issues and risks. Currently, my focus lies on being an asset, and in collectively working towards client’s success. Skill set: ----------- ☑ Programming Languages: ➤ JavaScript / TypeScript / ECMAScript( ES6 ) ➤ HTML / HTML5 / CSS3 / Tailwind CSS / SCSS / LESS ➤ PHP / SQL ☑ Frontend: ➤ React / Redux / Next / Gatsby / React BootStrap / React Native ➤ UI frameworks / tools: Tailwind CSS / Material UI / Chakra UI / BootStrap 3+ ☑ Backend: ➤ Laravel / Ruby on Rails / Django ➤ Node / Express ☑ Blockchain: ➤ Solidity / Web3.js / Solana / Ethereum ☑ DB Management: ➤ MySQL / MongoDB / PostgreSQL / Redis / GraphQL / DynamoDB ☑ SVN and Agile Methods: ➤ Github / Gitlab / BitBucket / Git ➤ Jira / Trello / Notion ☑ Cloud Services: ➤ AWS Lamda / S3 / EC2 / RDS / Cognito ➤ Firebase / Heroku / GCP ➤ Microsoft Azure My goal is to exceed your expectations, therefore we will not settle for just any solution, I will always strive to find the best solution. When working with me, you can rest assured that you are getting top-notch work, so you can focus on your business. Sincerely. Oleh Kovelsky daha az
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  •     mohanedmagdii
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    mohanedmagdii mohanedmagdii

    Egypt 35$ USD / saat
    MERN Stack Developer
    Egypt
    Over 3 years of strong experience as MERN developer with solid understanding of back-end technologies, MVC frameworks, Restful web services and Data Base designing. Analyzed business requirements to translate into technical requirements and developed web application using Node.js, Express, MongoDB, and React ( Redux,...
    Over 3 years of strong experience as MERN developer with solid understanding of back-end technologies, MVC frameworks, Restful web services and Data Base designing. Analyzed business requirements to translate into technical requirements and developed web application using Node.js, Express, MongoDB, and React ( Redux, Saga, and Hooks ) My Skills: - Ability to work with Javascript and Typescript. - Great experience with Async and Promises. - Hands on Database Structure, relations, queries and building models in both NoSQL and SQL databases. - Worked with Google APIs. - Hands on Postman and Swagger. - Experience with testing. - Experience with React / Next (Redux, Saga and Hooks). - Proficient understanding of code versioning tools (Git) - Good experience with Firebase and Firestore. - Experience with Stripe, Hypepay and Tap Payment. - Knowledge of Docker. - Experience with AWS ( S3, Polly, Textract, SNS, and SQS ) - Experience with Sockets and Real-time Apps daha az
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  •     WhizPool
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    WhizPool WhizPool

    Pakistan 30$ USD / saat
    Mobile Apps, Big data, Cloud and Web consultants.
    Pakistan
    Hello, Thank you for considering WhizPool for your Software and App Development needs! WhizPool is a Software Outsourcing and Consulting company with a wide range of specialties that comes from a varied, talented team of 30+ tech experts. Our diverse, knowledgeable group of professionals succeeds through timeliness,...
    Hello, Thank you for considering WhizPool for your Software and App Development needs! WhizPool is a Software Outsourcing and Consulting company with a wide range of specialties that comes from a varied, talented team of 30+ tech experts. Our diverse, knowledgeable group of professionals succeeds through timeliness, perseverance, open communication, and a belief that we can only deliver the best possible product to you, the client. We are constantly learning new softwares, languages and techniques to remain one of the Top 5 Freelancer Mobile App Developers. We offer a number of different services to our current and prospective client, including (but not limited to): ● Mobile Apps ● Cloud Computing / DevOps ● Enterprise Web Apps ● Database Consultancy (SQL and NoSQL) ● WebRTC ● UI/UX Services Our Technical Software Development team is well versed in all relevant development tools and programming languages needed to create the most complete, effective product possible. We’re able to develop in: ● Mobile Apps : Swift, Kotlin, React Native, Flutter ● Web Apps: Node.js, PHP, Golang, React, Angular, Wordpress, Laravel ● Databases: MySQL, SQL Server, Elastic Search, Cassandra, ScyllaDB, Oracle. ● DevOps : Docker, Kubernetes, Jenkins If you have questions about our portfolio, experience, or reviews, feel free to consult the relevant areas of our profile and send us a message. We’re happy to chat about distinct highlights (like our work with IBM) and our work process to show you that we are the company you need. Thanks for reading through, and we hope to hear from you soon! daha az
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  •     stefkev
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    stefkev stefkev

    Serbia 75$ USD / saat
    Software developer | Devops | Blockchain developer
    Serbia
    Finished Microsoft's certified Faculty RAF in Belgrade. Active development on Freelancer platform since 2013. I am offering custom solution for Your needs: Creating any custom API, various backend services and various gateways are possible. On any work I do offer guarantee and maintenance on your systems.
    Finished Microsoft's certified Faculty RAF in Belgrade. Active development on Freelancer platform since 2013. I am offering custom solution for Your needs: Creating any custom API, various backend services and various gateways are possible. On any work I do offer guarantee and maintenance on your systems. daha az
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  •     sherifamgadnabih
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    sherifamgadnabih sherifamgadnabih

    Egypt 25$ USD / saat
    Lead .NET Full Stack Software Engineer
    Egypt
    I am a lead developer of ASP.NET Core MVC & CMS & ASP.NET Zero & Boilerplate & Umbraco with over 12 years of experience in software development. I am an expert on windows and web development using C#, VB.NET, ASP.NET, Entity Framework. I work with ASP.NET, Core, MVC, Web API, WebServices, WCFServices, Webform, SQL...
    I am a lead developer of ASP.NET Core MVC & CMS & ASP.NET Zero & Boilerplate & Umbraco with over 12 years of experience in software development. I am an expert on windows and web development using C#, VB.NET, ASP.NET, Entity Framework. I work with ASP.NET, Core, MVC, Web API, WebServices, WCFServices, Webform, SQL Server, PostgreSQL, NoSQL, Firebase, MongoDB, Oracle, MySQL, Crystal Report, RDLC, SSIS, SSRS, HTML, CSS, Javascript, TypeScript, Jquery, AJAX, Angular, React, Redux, TFS, SVN, Github, GitLab, Bitbucket, Azure, AWS, SmarterASP, VPS & Plesk, Angular, Angular2, ReactJS, konckOutJS, Javascript, HTML, CSS, JQUERY Mobile Development XAMARIN FORMS, XAMARIN NATIVE, FLUTTER, IOS AND ANDROID DEVELOPMENT I use the Repository Pattern, Onion Architecture, Domain-Driven Design Architecture & Dependency Injection Design Pattern. I follow the SOLID principle. When working on a project with you, I like to keep in touch so we both have a clear understanding of our needs and vision of the project we are creating together. I deliver a quality product on time and on budget. Client satisfaction is my main goal. Thank you for your time and consideration. daha az
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  •     abdrahym
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    abdrahym abdrahym

    Indonesia 18$ USD / saat
    Data Specialist | Database | GIS | Full-stack Web
    Indonesia
    # Summary: Expert and experience in Data, Database, and GIS Specialist, and enthusiastic about data science, web development, and cloud computing with experience of over 10 years in Data, Database, and GIS. Development, Administration, and Maintenance for Database in RDBMS System, GIS System, Geospatial, and land...
    # Summary: Expert and experience in Data, Database, and GIS Specialist, and enthusiastic about data science, web development, and cloud computing with experience of over 10 years in Data, Database, and GIS. Development, Administration, and Maintenance for Database in RDBMS System, GIS System, Geospatial, and land information for Project Operations. Design, build, and develops a Database System, Web Development, and application module for Data and database, Analyst, Report, and Database Management System for Project System Operationally. # Open New Opportunities and Freelance Data Specialist for data collection, data cleansing, data processing, data management, data wrangling, data Profiling, exploratory data analysis, data visualization, data QaQc, data manipulation, data analysis, SQL Programing, Big Query, statistical, and data science. GIS Specialist for GIS Mapping Cartographer, Spatial Analyst, Spatial data science, GIS Data Management, GIS Database Development, Setup GIS System Operationality, Data and Database for GIS System. Design and Build Database Management System, Database Application Module for desktops Applications, Web Applications, restful API, database design, and database engineer. Web Design, Full-stack Web Development, Web Hosting, Domain, installation, landing page, web application, and website for the organization. Built the Web with a framework or content management system application Office Tools Application Services. Development tool application in MS Excel and MS Access Database for optimization of routine operationally in the production. # Top Skills * Office Software Software: Microsoft Office (Word, Excel, Access, PowerPoint, Visio) * Data Specialist Python Programing for Data Specialist, Google DataStudio, PowerBI, Tableau, SQL Programing, Programing of Microsoft Access database application, DBMS MSSQL Server, DBMS MySQL Server, and Database application development. * Geographical Information System (GIS) Specialist and Geo-Science ESRI ArcGIS Pro, ArcGIS Online, ArcGIS Desktop (ArcMap, Arc Reader Arc Scene, and 3D; Arc Globe; ArcCatalog), QGIS, Micromine, Global Mapper, Map source, GPS, QGIS Cloud. Web GIS * Web Development HTML, CSS, JavaScript, Docker, PHP, MVC Web Framework and CMS, Bootstrap, CodeIgniter Framework, Laravel Framework, Django, nodeJS, WordPress CMS, and other’s Framework * Remote Sensing (RS) & Processing of Geo digital image ESRI ArcGIS, ER Mapper, Erdas * Cloud Computing and Networking. AWS, Google Cloud, LAN, WLAN, Bridge, Switch, Routing, WAN, Mikrotik System. daha az
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  •     Potashova1
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    Potashova1 Potashova1

    Kazakhstan 35$ USD / saat
    Blockchain&&Software Architect | Full Stack, Unity
    Kazakhstan
    Starting from middle of 2018 began proactively working on blockchain related projects as a Blockchain Software Architect. My experiences range from creating both Front-end Blockchain applications to Backend Architecture design and implementation, Smart Contract Development, Unity3D Game Development, NFT, testing,...
    Starting from middle of 2018 began proactively working on blockchain related projects as a Blockchain Software Architect. My experiences range from creating both Front-end Blockchain applications to Backend Architecture design and implementation, Smart Contract Development, Unity3D Game Development, NFT, testing, auditing and development for Fintech and other industries that need the power of decentralization, tokenization, and smart contracts. Expertise in Public Blockchain Platforms: Ethereum | Solana | Binance Smart Chain ✓ Developing smart contracts by Solidity and Rust programming languages. ✓ Developing RPC using client libraries such as Web3.js. ✓ Static analysis of smart contracts for gas consumption and optimization using Remix IDE. ✓ Securing smart contracts using libraries like OpenZeppelin. ✓ Developing Ethereum dApps using Truffle framework. ✓ Integration with crypto wallets such as Metamask & Phantom. ✓ Deploying smart contracts on test networks such as ropsten/rinkeby as well as ethereum/solana mainnet. Expertise in Private & Consortium Blockchain Platforms Hyperledger Fabric ✓ Developing Chaincode using the Go programming language. ✓ Developing proof of concepts using Hyperledger Composer. ✓ Integration with Fabric Java SDK. ✓ Creating RESTful APIs for client applications to communicate with the blockchain network. ✓ Creating channels, orderers, and peers. ✓ Deployment and instantiation of Chaincode on channels on cloud services like IBM Bluemix and Amazon AWS. I hold expertise with: - Software Architecture / Software Engineering / Software Testing - Solidity / Rust / Golang - React / ExpressJS / Vue.js / Next.js / Angular.js - Unity3D Game Development / Virtual Reality / Augmented Reality - MongoDB / MySQL / PostgreSQL / MSSQL - Laravel / PHP / WordPress / Magento - Heroku / VPS / Amazon Web Services (AWS) / Digital Ocean - Github, Gitlab, Bitbucket, Trello, Backlog, etc. Here are the applications that I've built so far. - Dapp, DeFi development - NFT game/marketplace development on Ethereum & Solana blockchains in Solidity & Rust - Unity3D NFT Game - Ethereum & Binance Smart Chain token development on ERC20, ERC721, ERC1155, BEP20, BEP721 & BEP1155 protocols - ICO / ITO / IDO / STO, Cryptocurrency exchange & Cryptocurrency wallet Development Further Expertise & Work Deliverables in Blockchain: ✓ DApp for Supply Chain Management for Food Industry ✓ DApp implementation in Philanthropy ✓ DApp for Anti-Counterfeiting in the Pharmaceutical Industry ✓ Worked on Protocols like Ethereum, IBM Hyperledger, Stellar ✓ SetUp of a Permission-based Consortium Network ✓ Implementation of Private, Public and Permission-based network Thanks for your kind attention. daha az
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  •     bogdanmil
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    bogdanmil bogdanmil

    Serbia 40$ USD / saat
    Blockchain | Full Stack developer
    Serbia
    Focused on Ethereum, BSC, Polkadot, Solana and Avax. Working with blockchain, cryptocurrencies and the opportunities they create. Talk to me if you want help with: - NFTs (Creation, Marketplace, for ex. like on Rarible, SuperRare, etc.) - ERC20 - Token creation and distribution - DeFi (Yield Farming, for ex. via...
    Focused on Ethereum, BSC, Polkadot, Solana and Avax. Working with blockchain, cryptocurrencies and the opportunities they create. Talk to me if you want help with: - NFTs (Creation, Marketplace, for ex. like on Rarible, SuperRare, etc.) - ERC20 - Token creation and distribution - DeFi (Yield Farming, for ex. via platforms like Yearn, Uniswap, Sushiswap, Compound, Aave) - Flashloans & Arbitrage - Smart Contract Development - dApp and App Development My "weapons": - Solidity, Vyper & Ethereum - Rust, Substrate & Polkadot - Truffle, Brownie, Hardhat ((incl. Unit Testing, Property/Fuzzing Testing) - Metamask - React/Typescript, web3.js/ethers.js [ Core Skills ] ✔️ Frontend: Javascript/typescript, HTML, CSS, Bootstrap, tailwind CSS, Material UI, jQuery and Responsive design. React.js,Next.js, Nuxt.js, Web3.js ✔️ Backend: Node.js, Nest.js, Express.js, PHP, Laravel,WordPress, Python ✔️ Database: SQL, MySQL, MongoDB, PostgreSQL, GraphQL Contact me soonest! I'm looking forward to working with you! daha az
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  •     pavledimitrijev3
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    pavledimitrijev3 pavledimitrijev3

    Serbia 50$ USD / saat
    Senior Full-Stack and Blockchain Developer
    Serbia
    Hello, my name is Pavle. As a Senior Developer, with outstanding experience in various fields, such as web and cryptocurrency. - Cryptocurrency tech: * Crypto Coins Exchange Development * Custom Blockchain Development * ICO, IDO Development with Created Token ( Coin ) * Smart-Contracts (Solidity, Truffle...
    Hello, my name is Pavle. As a Senior Developer, with outstanding experience in various fields, such as web and cryptocurrency. - Cryptocurrency tech: * Crypto Coins Exchange Development * Custom Blockchain Development * ICO, IDO Development with Created Token ( Coin ) * Smart-Contracts (Solidity, Truffle framework) * Token development (ERC20, ERC223, ERC721, ERC 1155) * Cryptocurrency Wallet and Exchange Applications * Private Blockchain Development - Web tech: My Strong Experiences are as follows: • Django/Python • ReactJS/Redux • React Native • Next.JS • Vue/Vuex • PHP(Laravel, CodeIgniter) • WordPress • HTML/SASS/CSS • PostgreSQL/Mongo/MySQL Database • CSSFramework like Bootstrap, Material UI, Semantic UI, etc… • NodeJS • Backend Rest API • AWS Web Service • AWS Elastic Beanstalk/EC2 • Payment Integration Thank you for spending your time on my profile. daha az
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  •     VladislavPronin
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    VladislavPronin VladislavPronin

    Kazakhstan 30$ USD / saat
    Blockchain | Web developer
    Kazakhstan
    Web and Mobile developer who focussed on Blockchain and Crypto-related projects, building custom Apps, Crypto Gambling and Betting platforms, Trading Platforms and Exchanges, crypto lending and payment solutions. Last 6 years I have worked on several successful DeFi and FinTech startups. Solutions I provide: ✔ DEX...
    Web and Mobile developer who focussed on Blockchain and Crypto-related projects, building custom Apps, Crypto Gambling and Betting platforms, Trading Platforms and Exchanges, crypto lending and payment solutions. Last 6 years I have worked on several successful DeFi and FinTech startups. Solutions I provide: ✔ DEX and Centralized Crypto Exchange ✔ Advanced Trading Platform (Stocks, CFD, Forex, Option, Features...) ✔ Multichain Web and Mobile Wallet ✔ Crypto Betting and Casino ✔ Yield Farming Protocols ✔ Liquidity Mining Protocols ✔ P2P/Pool Lending and Borrowing ✔ Crypto Collectible Platforms and Non-Fungible Tokens ✔ Custom dApps ✔ ERC20, ERC777, ERC223, ERC721, ERC1155 Smart Contract Development ✔ ICO, STO, Blockchain Copyrighting and Whitepapers ✔ Token Design - Stabilcoins, Utility, Security, Investment, Dividend coins ✔ API Development and Integration: blockchain.info, inrura.io, poloniex.com, bitfinex.com, hitbtc.com, coinbase.com, kraken.com, cex.io, coinmarketcap.com, cryptokitties.co, uniswap.org, aave.com, yearn.finance, sushiswap.org ✔ DeFi development: Yearn, Uniswap, Curve, Balancer, Synthetic, Compound, Aave, Mooniswap, Fulcrum, dYdX, Sushi Swap, Zapper, Maker, insstaDApp, Bancor, Loopring, Polkadot, Substrate, WBTC, RenVM, DDorce, mStable, Alchemy, Binance Launchpool (BellaProtocol), MLM, NFT, BakerySwap, Pickle, Fortube, PerlinX, UMA Project, YFV, YFII, Synthetix, dForce, Swerve, Zoom Protocol, Pancake Swap. ✔ Blockchain stack : Web3, Solidity, Infura, Truffle, OpenZeppelin, MIST/Remix, BTC, ETH, TRON, USDT, YFI, Bel, Solana ✔ Wallets and Clients: MEW, Geth, Parity, Gemini Mist, Metamask, Ganache Web Stack: ✔ Web3.js, Ethereum, Solidity, Truffle ✔ PHP / Laravel / Yii (2) ✔ HTML (5), CSS (3), LESS, Sass, Bootstrap (3/4) ✔ JavaScript/ Typescript, Vue.js, React.js, Node.js,Python, Django ✔ MySQL, MongoDB, Redis ✔ 3rd Party API Integrations daha az
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