Sergii K.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.

Having extensive expertise in project management, finance & investments, accounting and business leadership, I position myself as a web developer with finance and business insight. I believe that code is for users not for developers, therefore I look at algorythms from the standpoint of the final beneficiary to make them smooth and easy to understand. I look for interesting and challenging projects, but will accept minor tasks, like cleaning your code from bugs and understanding the logic of your shopping engine. My specialities: 1) backend: - Python stack (Django, Flask, FastAPI), - PHP stack (Laravel, Zend Framework), - Node.JS stack (AWS Lambdas, Express.js, Next.js) 2) databases and data stores: MySQL, PostrgreSQL, MSSQL, MongoDB, Redis 4) frontend: plain Javascript, ReactJS, Angular, Vue.JS, 5) mobile: React Native, 6) integration between web and corporate systems (ERP and Accounting systems, Warehouse management systems, call management systems); 7) devops: full scope Linux Server administration; cloud administration for AWS, Google Cloud, IBM Cloud, Openshift; CI/CD with initiation from github / bitbucket; docker / k8s, auxiliary technologies.