Led the end-to-end migration from SQL Server to PostgreSQL, optimizing schemas and execution plans. This transition, combined with a move to AWS Aurora RDS, resulted in a ~30% reduction in monthly infrastructure spend. Orchestrated the refactoring of legacy .NET monoliths into AWS microservices (ECS Fargate & Lambda) using Terraform, increasing system scalability. Automated cloud provisioning using Terraform, ensuring environment consistency and eliminating manual configuration errors. Refactored core components to slash annual critical incidents from ~50 to 3 (94% uptime improvement), while supporting expansion from 1 to 5 countries. Spearheaded the transition of legacy UI to Next.js, significantly improving Core Web Vitals and overall user engagement. Built automated CI/CD pipelines (GitHub Actions), accelerating release cycles and enabling seamless multi-country deployments.