• Implemented batch notification system for tournament winners (up to 50) via Customer.io, resulting in a 25% increase in player retention
• Implemented UTM tracking during user registration, enabling transparent traffic source analytics and improvedmarketing campaign optimization
• Built a Responsible Gaming system with configurable limits and selfexclusion, significantly reducing user complaints
• Built manual user verification functionality in the admin panel with enhanced filtering and status display, reducingsupport workload and cutting verification time by 30%

Project 2: Real-time matching platform

• Architected and developed a microservices-based system in Node.js, ensuring high scalability and fault tolerance.
• Worked closely with the TeamLead to design core system components, selecting optimal technologies and best practices.
• Built a secure authentication system using JWT tokens, ensuring data privacy and user security.
• Integrated caching solutions (Redis), reducing API response times by 90%, significantly improving app performance and user experience.

Project 1: Enterprise Management System module

• Mentored and onboarded new developers, accelerating their integration and technical growth.
• Developed a scalable photo upload system with compression and cloud storage in MinIO S3, optimizing storage efficiency.
• Optimized complex SQL queries, improving database performance and reducing query execution times by 30%, ensuring seamless application performance under high traffic.