Developed and maintained a high-performance cryptocurrency exchange platform using Meteor.js, leveraging WebSockets for real-time updates. Built the server-side logic to handle user requests and execute automated tasks using multiple cron jobs, deploying the application using Docker within AWS EC2 instances. Utilized MongoDB for data storage. Implemented Redis caching (backed by AWS ElastiCache in production) to store platform rates and historical rate data, exposing them via a public API served with AWS Lambda for high availability. Developed server-side integrations with blockchain nodes to handle transaction processing and balance tracking. Built dynamic and responsive web interfaces with React and Ant Design (Antd), incorporating theming capabilities to support dark mode. Developed an admin dashboard with a dedicated view, initially supporting manual procedures but progressively automating key operations, such as the assignment of users' prepaid cards.

Developed a CRM system with a microservices architecture. Built APIs, optimized performance, and maintained scalable services.

Developed and maintained real-time UI systems in Java. Worked in a fast-paced, mission-critical environment.