System, using existing liveness detection service, allowing users to scan ID cards, check customer relevance and read essential information. ● Built Service API using NestJS ● Wrote unit tests for testing business logic ● Developed front-end application with React library ● Used MongoDB with TypeORM ● Created custom logger utilizing Newrelic APM & Log monitoring

An e-commerce based website platform, offering users personal stores for selling merchandise, clothing, accessories and etc.: ● Developed website using Angular framework for front-end, Node/Express.js for back-end ● Built admin panel for transaction, user and content management ● Used MariaDB for structured data ● Utilized Nginx for load-balancing, ddos mitigation and https ● Managed vps and dns host records

Admin panel for managing pharmacy vending machine: ● Built several admin panels using vanilla JavaScript ● Developed validation code on the front-end for UX, on the back-end for security ● Wrote 3 large and performant static survey front-ends ● Developed reporting module for CSV and Excel data exports in Node.js (statistics for usage, transactions and surveys) ● Created queries for MariaDB

allowing verified users to share articles, attend events, join local communities and socialize. • Built fully functional chat • Utilized Google Places API for geolocation • Used MySQL for structured data with Sequelize ORM • Developed GraphQL subscriptions using Redis and Websockets • Created notification service including in app and push notiβications