I'm Serhii Diachenko, a Senior Frontend Engineer specializing in Angular and scalable, data-intensive web apps for enterprise SaaS. Over 10+ years, I design domain-driven frontend architectures that convert complex business requirements into high-performance, real-time systems, using predictable state management, standardized data flows, and robust UI architecture. I also build maintainable CSS systems to ensure consistency, prevent regressions, and support rapid UI evolution, while laying the foundation for microfrontend-ready platforms. I focus on performance optimization, resilient error handling, and secure development practices. I improve rendering, change detection, data flow, and bundle sizes, implement robust API integrations, authentication flows, and frontend security measures. I mentor teams, refactor legacy code, and embrace AI-assisted development tools (Cursor, GitHub Copilot) to increase speed, code quality, and debugging efficiency, collaborating across product, backend, QA, and UX.…I'm Serhii Diachenko, a Senior Frontend Engineer specializing in Angular and scalable, data-intensive web apps for enterprise SaaS. Over 10+ years, I design domain-driven frontend architectures that convert complex business requirements into high-performance, real-time systems, using predictable state management, standardized data flows, and robust UI architecture. I also build maintainable CSS systems to ensure consistency, prevent regressions, and support rapid UI evolution, while laying the foundation for microfrontend-ready platforms. I focus on performance optimization, resilient error handling, and secure development practices. I improve rendering, change detection, data flow, and bundle sizes, implement robust API integrations, authentication flows, and frontend security measures. I mentor teams, refactor legacy code, and embrace AI-assisted development tools (Cursor, GitHub Copilot) to increase speed, code quality, and debugging efficiency, collaborating across product, backend, QA, and UX.WWWW…