Full Stack DeveloperHello, I'm Ranielli Montagna
A Full Stack Developer passionate about creating exceptional digital experiences
I have experience in developing web and mobile applications, with a focus on quality, performance, and usability.
Technologies I master
About Me

Hello! I'm Ranielli Montagna, a full stack developer passionate about turning ideas into innovative digital solutions. With over 3 years of experience, I specialize in creating web and mobile applications that combine exceptional functionality with intuitive design.
My journey began with a curiosity about how things work on the web, and since then I have been developing projects that positively impact people's lives. I believe technology should be accessible and make a difference.
When I'm not coding, you can find me exploring new technologies, contributing to open source projects, or planning my next development adventure.
My main skills
Frontend
- React
- Next.js
- TypeScript
- Tailwind CSS
- React Native
Backend
- Node.js
- Fastify
- PostgreSQL
- Prisma
- JWT
Design
- Figma
- UI/UX
- Prototyping
- Design System
- Accessibility
Tools
- Git
- Docker
- VS Code
- Postman
- Vercel
How I can help your project
I offer complete development solutions, from conception to delivery, focusing on quality and exceptional results.
Web Development
Creation of modern, responsive and performant web applications using the best market technologies.
What's included:
- High-conversion landing pages
- Complete e-commerce
- Administrative dashboards
- REST and GraphQL APIs
- External services integration
Mobile Development
Native and hybrid applications for iOS and Android with exceptional user experience.
What's included:
- React Native apps
- Native interface
- API integration
- Push notifications
- App store publishing
Performance Optimization
Improve the speed and performance of your existing website or application.
What's included:
- Complete audit
- Image optimization
- Code splitting
- Lazy loading
- Core Web Vitals
Technical Consulting
Specialized guidance for technical decisions, architecture and best practices.
What's included:
- Architecture analysis
- Code review
- Technology selection
- Technical mentoring
- Project planning
Ready to start your project?
Let's talk about how I can help turn your idea into reality.
Professional Experience
Over 3 years building innovative solutions in companies of different sizes and segments, always focused on delivering value and growing technically.

Mid-level Developer
Luizalabs
I am part of the Luizalabs team, the technology innovation unit of Magalu, one of Brazil's largest retailers. I develop and maintain web and mobile applications for physical store operations, as well as robust and scalable APIs and backend solutions.
Key achievements:
- Development of applications for retail operations
- Maintenance of APIs and backend solutions
- System integration in a high-impact environment
- Work with modern and scalable technologies
Technologies used:

Front-end Tech Lead
Smarten
I led a team of developers, ensuring code quality and application optimization. I created and maintained the corporate design system, and implemented monitoring and CI/CD solutions, boosting the efficiency and stability of the products.
Key achievements:
- Technical leadership of a developer team
- Creation and maintenance of a design system
- Implementation of CI/CD and monitoring
- Performance and scalability optimization
Technologies used:
Front-end Developer
SBSistemas
First professional experience in the technology field, where I consolidated my technical foundation in front-end development. I developed applications using modern technologies and implemented best development practices.
Key achievements:
- First professional experience in tech
- Development of front-end applications
- Consolidation of a solid technical foundation
- Implementation of best development practices
Technologies used:
My Projects
A selection of my most recent works, including web, mobile, and API applications that demonstrate my technical skills.
Featured Projects
Magalu Stockist Mobile
Corporate superapp for stockists at Magalu's physical stores, optimizing inventory control, goods receipt, and dispatch.
Magalu Stockist Mobile
Corporate superapp for stockists at Magalu's physical stores, optimizing inventory control, goods receipt, and dispatch.
Smart Design System
A design system based on Material Design, aimed at standardizing product interfaces to improve the user experience.
Além do Arco-Íris App
The 'Além do Arco-íris' app offers the course 'Ally: a holistic approach to LGBT+ health' to empower healthcare professionals in assisting the LGBT+ community.
Senna Design System
A design system used for Next.js projects, with the goal of standardizing product interfaces to enhance the user experience.
Want to see more projects? Explore my GitHub repository with over 100 open source projects!
Let's work together
I'm interested in freelance or full-time opportunities. If you have a project in mind or just want to chat, I'd be happy to talk.