John Can Aygin

Architected micro-frontend system using React components enabling 5+ development teams to deploy UI modules independently and reduce deployment conflicts by 80%. Delivered over 15 Angular UI components from design mockups to production, serving 10,000+ internal users across enterprise tooling platforms. Automated deployment processes reducing manual deployment time from 2 hours to 15 minutes using Node.js scripts. Led Java-to-Go migration for 3 critical microservices adopting TDD, improving performance by 40% and reducing memory usage by 60% while maintaining 100% test coverage and API compatibility. Maintained and debugged Go microservices architecture resolving 25+ production issues ensuring 99.9% uptime with comprehensive unit and integration testing. Integrated 8+ microservice APIs using Swagger/OpenAPI specifications ensuring consistent data flow across distributed systems. Championed test-driven development practices with extensive unit and integration test suites in Jest, Python

Built cross-platform mobile application using React Native achieving feature parity between iOS and Android platforms. Developed core web application features in React with MongoDB backend supporting user authentication and data management. Delivered bug fixes and feature enhancements in fast-paced startup environment, contributing to 20% improvement in user engagement.