Hi, my name is Marcos. I'm a mobile developer with more than 5 years of experience, focused on React Native. I started my career working with web development, but in the last years I’ve been working mostly on mobile apps. I worked on white-label apps, banking systems, e-learning platforms, and telecom solutions. One of my biggest projects was an app for supermarkets in Latin America, where I worked on credit card features, payments, and app performance. I have good experience with Redux, Context API, API integration, and I like to follow good practices like clean code and writing unit tests. I’m also comfortable working with teams, reviewing code, and helping improve the product. Now I’m looking for international remote opportunities to grow more and work with global teams.

Marcos Nunes de Souza

Hi, my name is Marcos. I'm a mobile developer with more than 5 years of experience, focused on React Native. I started my career working with web development, but in the last years I’ve been working mostly on mobile apps. I worked on white-label apps, banking systems, e-learning platforms, and telecom solutions. One of my biggest projects was an app for supermarkets in Latin America, where I worked on credit card features, payments, and app performance. I have good experience with Redux, Context API, API integration, and I like to follow good practices like clean code and writing unit tests. I’m also comfortable working with teams, reviewing code, and helping improve the product. Now I’m looking for international remote opportunities to grow more and work with global teams.

Available to hire

Hi, my name is Marcos. I’m a mobile developer with more than 5 years of experience, focused on React Native.
I started my career working with web development, but in the last years I’ve been working mostly on mobile apps.
I worked on white-label apps, banking systems, e-learning platforms, and telecom solutions.
One of my biggest projects was an app for supermarkets in Latin America, where I worked on credit card features, payments, and app performance.
I have good experience with Redux, Context API, API integration, and I like to follow good practices like clean code and writing unit tests.
I’m also comfortable working with teams, reviewing code, and helping improve the product.
Now I’m looking for international remote opportunities to grow more and work with global teams.

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Experience Level

Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Intermediate
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Language

English
Fluent
Spanish; Castilian
Beginner

Work Experience

Fullstack / Mobile Developer at Freelancer
May 1, 2024 - Present
Complete development of apps and web systems. Creation of interfaces in Figma and frontend implementation. iOS (SwiftUI), Android (Kotlin), React Native and Angular applications. Backend with C#, PHP, and Node.js, and integration with REST APIs and secure authentication. Application of Clean Architecture and MVVM. Automated testing and app store deployment. Focus on performance, usability, offline features, and fast deliveries using agile methodologies.
React / React Native Developer at Ahoy by Belago
June 1, 2023 - March 1, 2024
Maintenance of the White Label app and customization for GB Arbosa and Mercantil networks. Optimization of the financial module (-35% errors, +35% usage). Use of Redux, Context API and Styled-components and integration with REST APIs. Automated deployments via GitLab CI/CD and monitoring with Firebase Crashlytics. Performance improvements (-20% load time).
React / React Native Developer at Opah IT
October 1, 2021 - January 1, 2023
Development of banking, education, and various other apps. Creation of resources with secure authentication. Real-time monitoring with IoT sensors. Application of Clean Code best practices and use of React Native, WebSockets, and REST APIs. Automated testing and CI/CD with GitLab and collaboration with multi disciplinary teams.
React / React Native Developer at Group W
September 1, 2021 - December 1, 2022
Unimed Litoral app update. +40% compatibility and improved performance. Development of medical and hotel apps. Code refactoring and UX/UI improvement. Creation of components with Styled-components. Testing with Jest and REST API integration. Agile deliveries aligned with client needs.
React / React Native Developer at Ultratel Telecom
April 1, 2019 - April 1, 2021
Mobile frontend development for three applications. Responsive and high-performance interfaces. +25% adoption and -20% loading time. Integration with Firebase Crashlytics. Use of Redux, Context API, and REST APIs. Publishing and maintenance on the Play Store and App Store. Participation in the complete release cycle.
Full Stack Developer Analyst at Bizapp CRM
May 1, 2018 - August 1, 2019
Development of portals with Dynamics 365 CRM. Integrations with ASP.NET, SQL, and NoSQL. Dynamic forms with JavaScript ES 6. Collaboration with product and technical support teams. Backend with C#.

Education

Bachelor's Degree in Computer Engineering at Santa Cecília University
January 11, 2030 - December 13, 2025

Qualifications

Rocketseat courses in React JS, React Native, Node.js, AI Development, iOS with Swift, Full Stack Development, UI/UX Design, C#, ASP.NET, Java
January 11, 2030 - December 13, 2025

Industry Experience

Software & Internet, Healthcare, Media & Entertainment, Education, Professional Services

Experience Level

Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Intermediate
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