Kostya has a solid background in the development of front/back-end functionality and skilled in React.js, HTML, CSS, JavaScript, PHP, Laravel, Node.js, Express, GraphQL, MySQL, MongoDB, PostgreSQL, etc. Took part in the development of different types of applications (websites, platforms, streaming services, mobile applications, etc.) created and refactored APIs and libraries, led a team of 5 developers and was responsible for code review, tasks prioritizing, and architecture decisions. Interested in backend development using NodeJS/PHP and frontend using ReactJS.