Marvin Rocha Sousa Ferreira

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
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GitHub: github.com/marvinrf
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