Architected and implemented mission-critical payment gateway system processing 1M+ daily transactions with 99.99% uptime using TypeScript, Next.js, Nest.js, and PostgreSQL. Designed and developed responsive merchant dashboard with real-time transaction monitoring, reducing payment reconciliation time by 65% while maintaining PCI-DSS compliance. Implemented microservice architecture with API gateway pattern, resulting in 30% improved scalability during peak transaction periods and seamless third-party banking integrations.

Delivered 3+ production-grade solutions using modern TypeScript stack, maintaining 98% code coverage and implementing best practices in web security. Led team of 3 junior developers in rebuilding organization website with Next.js, increasing page load speed by 40% and improving SEO ranking by 15 positions. Implemented server-side rendering and dynamic routing strategies, improving application performance by 35% and enhancing user experience metrics.