Rodrigo Barreto
Senior Full-Stack Engineer •Ruby on Rails •Founder at Mentorflow
I build scalable web applications and help teams deliver better software through clean architecture, testing, and performance optimization. Connect with me on LinkedIn to follow my journey as a software engineer and founder.
💡 Backend Performance: Optimized page load times from 3-6 seconds to ~200ms by eliminating N+1 queries and optimizing database indexes at Workwize.
⚡ Frontend Architecture: Modernized React applications by replacing complex useEffect chains with React Query, reducing component re-renders by 60% and improving data fetching patterns through intelligent caching and background synchronization.
🚀 MVP Development: Architected and built the complete Mentorflow platform from scratch — including Rails API backend, React web app, and React Native mobile app — taking the product from concept to production in 6 months.
What I Do.
My strongest expertise is in backend development, but I work across the full stack when needed.
Backend Development (Primary Focus)
Ruby on Rails, API design, database optimization
Frontend Development
React, JavaScript, responsive web interfaces
Performance & Architecture
Legacy refactoring, scalable system design
DevOps & Testing
CI/CD pipelines, E2E testing (Cypress, Playwright),TDD (Rspec)
My Journey.
Started with C# .NET at PUC-Rio Simdut lab building pipeline engineering systems and later worked at Indra on oil & energy platforms. Made the switch to Ruby on Rails in 2015 and have been focused on web applications ever since. 12+ years of building software professionally.
Currently.
Working as a Full-Stack Developer at Workwize, where I focus on backend architecture and performance optimization. I also run Mentorflow as Founder, where I handle the technical side and mentor a small development team.
Open Source & Writing.
I created the credit_device Ruby gem for Dutch credit checks (used by companies like YoungCapital). I also write about technology on Dev.to and contribute articles to VideosDeTI.
Education
Postgraduate Lato Sensu | Specialization in Software Engineering
Pontifícia Universidade Católica do Rio de Janeiro2024 - 2025
Focus on full-stack MVP development, software architecture, agile project management, and software quality assurance.
Mentorflow - Founder
I founded Mentorflow and built the entire technical foundation — from the initial backend and frontend architecture to the current API and deployment infrastructure.
Today I handle the technical roadmap, backend API development for both our web and mobile applications, server maintenance, and mentor two frontend developers working on our React Native mobile app and React web application.
Contact Me
Interested in collaborating or discussing opportunities? Get in touch via email or connect with me on LinkedIn.
Location: Porto, Portugal 🇵🇹