GameDuo

Resolved game balance response delays and operational efficiency issues due to inability to track data change history

• Repository Abstraction Layer: Dedicated Repository design for entities requiring Audit Log management
• Multi-DB Integrated Version Control: UUID-based cross-environment/project entity tracking system
• Event Sourcing-based Merge System: Git-like multi-environment/game conflict resolution
• Version Diff Engine: Field-level change tracking algorithm for object-level changes

Resolved marketing operational inefficiency and lack of integration from multi-platform distributed management

• Integrated Dashboard: Manage all platform campaigns per game project in one place
• Platform-specific API Module Separation: Independent API modules specialized for Google Ads/Meta/TikTok

Transitioned BigQuery data from Excel-based to internal admin-based integrated management

• BigQuery Snapshot-based Version Control: Point-in-time data management for periodic ML prediction data changes
• BigQuery Storage Read API: gRPC streaming-based high-performance data reading with 82% cost reduction

Resolved batch job processing limitations for marketing metrics system 60-day → 360-day expansion

• Hybrid Architecture: API Server (EC2) + Batch/Job Processing (Lambda) separation
• Event-Driven Architecture: SQS + Lambda + EventBridge based async processing
• NestJS DI-based Lambda Factory: Lambda adapter for existing code reuse and DI system
• Transactional Outbox Pattern: Event publishing system for data consistency
• RDS Proxy Connection Management: Resolved DB connection exhaustion during massive Lambda execution

Resolved duplicate common logic development and implementation pattern differences across projects

• Internal GitHub Private Package: NPM-based library distribution and version management
• Repository Module: Bulk operations, Audit Log, TypeORM type narrowing support
• TypeScript Generics: Function overloading-based type narrowing to overcome TypeORM type limitations