Serhii S.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.

The main goal is to solve your problems. I have more than 4 years of experience in developing backend and front-end applications for solving various business problems. Like to design the architecture of projects and databases. Main skills and area of expertise: ✔ HTML, CCS, Javascript, React, Vue.JS 2/3, Angular 10, GraphQL ✔ C#, ASP.NET Core 3-6, ASP.NET Framework, ASP.NET Web API, Cloud logging with Sentry/Google/AWS ✔ MS SQL, Mongo DB, PostgreSQL ✔ Umbraco CMS ✔ Solidity, Hardhat, web3.js, ethers.js