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João – React Native, Next.js, React, experts in Lemon.io

João

From Brazil (GMT-3)

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Mobile DeveloperSenior
Front-end Web DeveloperSenior
Hire developer
9 years of commercial experience
Agritech
Banking
Consulting services
Edtech
Govtech
Social impact
Sports
Communication tools
Lemon.io stats
1
projects done
72
hours worked
1
offers now 🔥

João – React Native, Next.js, React

João is a developer who will make a strong impression right from the start. With 8 years of commercial experience, he excels in consulting, hands-on coding, and architectural decisions. His passion for learning is evident through his mastery of over 18 technologies and experience in different business domains, including banking, sports, edtech, and more.

Main technologies
React Native
6 years
Next.js
1 year
React
7 years
Typescript
6 years
JavaScript
8 years
Additional skills
Docker
CI/CD
Integration testing
GCP
React Hooks
Java
React Native CLI
Node.js
Expo
Flutter
AWS
Angular JS
Android
Redux
iOS
Swift
Kotlin
DevOps
Ready to start
ASAP
Direct hire
Potentially possible

Ready to get matched with vetted developers fast?
Let’s get started today!Hire developer

Experience Highlights

Senior Mobile Developer
Jul 2023 - Jul 20241 year
Project Overview

The product offers a comprehensive solution and support for student-athletes, guiding them through every stage of their journey from training to skill development and mentorship.

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Responsibilities:
  • Participated in the development of an MVP, beta testing and launch of the app;
  • Was engaged in making architectural discussions for the main app and a web admin platform;
  • Implemented advanced full-text search;
  • Redesigned the existing front end;
  • Built front-end components library;
  • Wrote unit, integration, and e2e tests;
  • Collaborated in react-native-ide to suit project demands;
  • Helped in the development of workflows for the team;
  • Integrated with different providers.
Project Tech stack:
React
Next.js
React Native
React Native CLI
Typescript
Java
Spring MVC
Node.js
GitHub
GitHub Actions
AWS
GraphQL
Stripe API
AI
Amazon Cognito
Android
iOS
Tailwind CSS
Expo
Senior Front-End Consultant
Aug 2022 - Mar 20237 months
Project Overview

The project is in the agribusiness sector, and its primary objective is to create a comprehensive digital platform to streamline and enhance the various processes within the agribusiness ecosystem.

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Responsibilities:
  • Played a key role in developing new features;
  • Maintained published code identifying and resolving issues in the existing codebase;
  • Helped to establish effective workflows for the development process;
  • Collaborated with the development team, contributing to planning sessions and code reviews;
  • Contributed to the development of automation strategies and automation flows;
  • Worked on identifying and addressing various technical debts within the project;
  • Was in charge of microservices migration from Node.js to Java.

One of the significant achievements during this project was reducing the bugfix response time by 80%.

Project Tech stack:
React Native
Java
Spring MVC
Node.js
Google API and Services
Jenkins
Typescript
React
React Hooks
React Query
Senior Front-End Consultant
Dec 2021 - Aug 20227 months
Project Overview

This project involved creating a digital trading platform for a client in the Swiss banking sector. The platform included a QR code payment system, online trading capabilities, asset management, and a watchlist feature for monitoring specific stocks and financial instruments.

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Responsibilities:
  • Launched the product on both Android and iOS;
  • Was responsible for the development of some features like the watchlist and QR code payments;
  • Redesigned all search fields to perform better with debounce;
  • Refactored code to achieve better performance;

Main achievement: The project has successfully met its objectives and demonstrated the potential of digital technology. The feedback received from the initial group of users was highly positive and highlighted the potential of digital technology to revolutionize the banking and trading experience.

Project Tech stack:
React
React Native
Monorepo
Middle Front-End Developer
Jul 2020 - Dec 20211 year 5 months
Project Overview

The project is a single tool with end-to-end integration, enabling real-time communication, organization, management, and data security for schools.

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Responsibilities:
  • Implemented advanced full-text search;
  • Worked on the development of the two main products, using internal tools and CI/CD automation;
  • Created a text formatting library for React Native internally;
  • Wrote unit, integration, and e2e tests;
  • Participated in technical leadership training and joined study groups on microservices and design systems.

Minute of Glory: Presented internal lectures on "React Native Architecture and State (2021)" and maintained internal component libraries for web and mobile.

Project Tech stack:
React
React Native
Ruby on Rails
Typescript
npm

Education

2024
Computing Science
Bachelor

Languages

Portuguese
Advanced
English
Advanced

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