Front-End - React, Apollo GraphQL, Recoil.Implemented new features such as:CRUD operations using Apollo GraphQL, updating cache after mutation.Using UI library Mui (Material UI) and integration with Formik library.Back-End - Node.js, Express, GraphQL, TypeGraphQL, TypeORM, PostgreSQLImplemented new features such as:Used TypeORM to create relationships between tables and entity classes to access and update information in the database.Created GraphQL queries and mutations to interact with PostgreSQL database.Implementing mailing using Express and NodemailerLogin implementation using JWT token

Project architectural solutions (layering UI, BLL, DAL)Implementation of new features such as:RESTful (Registration / loginization / pagination etc.)I used React Form, Formik, Formact, useForm.During the development process, I wrote tests for the reducer (TDD) using Jest.Translated the application to the Redux Toolkit to set a clear and understandable flow and simplify debugging in the future.TDD with Jest, Storybook, PostmanPerformance enhancement (memo, useCallback, lazy, Suspense etc.) Migration to Typescript

Communicating with customers, cash transactions, solving problems.Planning and scheduling employee shifts.Personnel management, delegation of tasks, control of product preparation and delivery to customers.Ordering products, equipment, consumables from suppliers.

Website development on CMS WordPress, DLE, Joomla.Development of a game server on a linux VPS/VDS system.Developing simple plugins in Pawn.