- Developed a REST API microservice using Hexagonal architecture, which improved maintainability and scalability.- Integrated Google API, Telegram API, and Discord API, expanding the application's functionality.- Created a search system using ElasticSearch, ensuring quick query processing.- Participated in architectural design with DDD, simplifying the work with business logic.- Optimized PostgreSQL using Redis caching, reducing response time.- Implemented CQRS for separating read and write operations, enhancing scalability.

- Implemented an admin panel using React to manage categories, products, and their attributes.- Developed the user-facing part using Next.js and SEO optimization to improve indexing.- Optimized the interface for handling large volumes of data by adding lazy loading and pagination, ensuring smooth performance.- Created an analytics system to track key marketplace metrics, such as sales, user activity, product popularity, and revenue.