Fullstack Developer (Mid-level) | Software Architect | Specialist in Performance Optimization & Scalable Systems for Fintechs and Digital Banking. I focus on transforming complex technical challenges into secure, sustainable, and high-performance solutions, always backed by measurable results. PERFORMANCE & OPTIMIZATION ● Reduced TTFB by 72% and decreased initial bundle size by 67%. ● Delivered consistent sub-1s LCP (Largest Contentful Paint) in production environments. TECH STACK & TECHNICAL EXPERTISE ● Frontend/Web: React, Next.js 15 (strong emphasis on SSR), Accessibility (WCAG), Tailwind CSS, Storybook, and reactive flows with RxJS. ● Backend/Architecture: NestJS (Modular Multi-App Architecture), DDD, Clean Architecture, Asynchronous Messaging (RabbitMQ), Advanced Caching (Redis). ● Databases: PostgreSQL, MongoDB, Prisma. ● DevOps/Testing: Docker, Jest, Cypress (E2E). ARCHITECTURE & QUALITY ● 2+ years delivering high-value solutions in fintech and digital banking. Currently leading the migration of legacy systems to Next.js. ● Strong focus on clean, testable architecture, building internal libraries (validation, enums, VOs) for reusability and strict typing. ● Security expertise with implementation of Multi-Factor Authentication (MFA). I’m looking for challenging projects that value technical excellence, architectural robustness, and high-impact delivery. If your organization prioritizes quality and modern, scalable solutions, let’s connect, I’d love to help elevate your application to the next level. Portfolio: portifolio-ten-livid.vercel.app Email: _Email not available. Sign in: https://www.twine.net/signup_ GitHub: github.com/marvinrf Phone:_Phone details not available. Sign in: https://www.twine.net/signup_…Fullstack Developer (Mid-level) | Software Architect | Specialist in Performance Optimization & Scalable Systems for Fintechs and Digital Banking. I focus on transforming complex technical challenges into secure, sustainable, and high-performance solutions, always backed by measurable results. PERFORMANCE & OPTIMIZATION ● Reduced TTFB by 72% and decreased initial bundle size by 67%. ● Delivered consistent sub-1s LCP (Largest Contentful Paint) in production environments. TECH STACK & TECHNICAL EXPERTISE ● Frontend/Web: React, Next.js 15 (strong emphasis on SSR), Accessibility (WCAG), Tailwind CSS, Storybook, and reactive flows with RxJS. ● Backend/Architecture: NestJS (Modular Multi-App Architecture), DDD, Clean Architecture, Asynchronous Messaging (RabbitMQ), Advanced Caching (Redis). ● Databases: PostgreSQL, MongoDB, Prisma. ● DevOps/Testing: Docker, Jest, Cypress (E2E). ARCHITECTURE & QUALITY ● 2+ years delivering high-value solutions in fintech and digital banking. Currently leading the migration of legacy systems to Next.js. ● Strong focus on clean, testable architecture, building internal libraries (validation, enums, VOs) for reusability and strict typing. ● Security expertise with implementation of Multi-Factor Authentication (MFA). I’m looking for challenging projects that value technical excellence, architectural robustness, and high-impact delivery. If your organization prioritizes quality and modern, scalable solutions, let’s connect, I’d love to help elevate your application to the next level. Portfolio: portifolio-ten-livid.vercel.app Email: _Email not available. Sign in: https://www.twine.net/signup_ GitHub: github.com/marvinrf Phone:_Phone details not available. Sign in: https://www.twine.net/signup_WWWW…