Semyon N.Private profile: Upwork shows its earnings only to signed-in members, so we check it every few weeks, not daily. MRR here is a rough estimate (Upwork's six-month earnings ÷ months active). Last read Nov 5, 2026.

Full-stack developer: - Development of front-end part of projects (from scratch / turnkey) - Cross-browser and adaptive layout of projects (pixel perfect) - Development of back-end part of the project (from scratch / turnkey) - Development, design of server part - Setting up the CI / CD pipeline of the project with git - Working on Jira (Kanban) / Confluence / Trello / github kanban and etc. - Developing data parsing systems - SEO optimisation of the project - Setup and integration of marketing tools (Google, Facebook and etc.) - Creation and elaboration of the project architecture - UX / UI Website design - Drafting of technical specifications with the customer - Development of technical and patent documentation Development of smart contracts: - Development of smart contracts of trading / voting and etc. - Development of smart contracts erc-20, erc-721, erc-1155 on solidity - Development of smart contracts bep-20, bep-721 - Development of smart contracts in solana network (metaplex) - Testing smart contracts in local network (ganache, truffle, hardhat, remix) and in test blockchain networks (ropsten, rinkeby, goerli, etc). - Deployment of smart contracts in the core network - Creating and connecting IPFS for smart contract tokens - Oracle smart contracts development - Smart contract validations in etherscan, polygonscan, etc. - Generation of ABI smart contracts Development of dApp (web3.js, ethers.js, MetaMask, Trust Wallet): - Web application development in JavaScript, Typescript - Connecting wallets (metamask, WalletConnect, Phantom, Trust Wallet and etc.). - Interactions with smart contracts (performing actions / transactions / signatures etc.) - Working with NFT tokens (IPFS metadata) - Accessing blockchain network via Infura and other providers - Working with blockchain API providers Moralis, QuickNode, etc. - Parsing transactions/events - Connecting to Opensea SDK (seaport), Rarible SDK - Working with OpenZeppellin standards Development in networks: Ethereum, polygon (matic), bsc (binance smart chain), tron, bitcoin, solana, IMX, ROE Stack: - Next.js - NestJS - PostgreSQL - web3.js / ethers.js / anchor / opensea (seaport sdk) / rarible (sdk) / google big data - Solidity / abi / ipfs / remix / OpenZeppelin / oracle - ERC-20 / ERC-721 / ERC-1155 / IERC / BEP - AWS (amplify / pipeline / beanstalk / EC2 / Route 53 / RDS / Secret Manager) - Google Cloud Console. - React / Angular / Vue.js - rxJS - GraphQL / REST API / socket.io - TypeScript / JavaScript (ES) - scaffold / hardhat / mataplex / ganache / truffle - Webpack / gulp - eslint / prettier / babel - i18n - monorepo - docker - mui / antd / bootstrap - styled-components / SASS / LESS - github / gitlab / bitbucket - CI / CD (aws + github) (QA stand & PROD stand) - Atlassian (Jira, Bitbucket, Confluence) / GitHub kanban - Figma / Photoshop / Adobe illustrator - Miro / Balsamiq - Postman - BrowserStack - metamask / walletConnect / Phantom - Google Tag Manager (adWords, Metrika, Facebook Pixel) - EVM (ethereum / polygon / bsc) / bitcoin / solana / immutableX / Rise of Elves / tron / localnet - html / CSS (BEM, ITCSS) - metamask / WalletConnect / Phantom / Trust Wallet - Infura provider and etc. - Moralis, QuickNode and etc. Other programming skills: - Unity - Flutter (iOS, android) - Review and Testing - nginx / apache - SQL - C# - webGL / theree.js / Canvas / SVG