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Josias Buday Dias

Full-Stack Mobile Software Engineer (React Native & Next.js)

About me:

As a Full-Stack Mobile Software Engineer, I specialize in creating simple, comprehensive, and efficient solutions using modern technologies. My focus is on the Node.js and React.js ecosystems, which allows me to build high-quality, scalable, and secure applications with minimal effort.

Currently, I'm leveraging my expertise to develop cross-platform applications with React Native. This enables me to deliver a consistent experience across Android, iOS, and the web from a single codebase.

My English proficiency is at the Upper-Intermediate (B2) level, which allows me to communicate effectively in professional and academic environments. I maintain my skills by regularly consuming technical content and collaborating with international colleagues.

Technical Expertise:

  • General: Node.js, JavaScript, TypeScript, Git, GitHub;
  • Front-End: HTML, CSS, Tailwind.css, React, Next.js;
  • Mobile: React Native, Expo, Expo-Router, React Native Paper;
  • Back-End: Express, Jest, TDD, JWT, OAuth 2;
  • Database: SQL, NoSQL (MongoDB);
  • AI: Google Gemini, OpenAI ChatGPT, Microsoft Copilot.

Languages:

  • Native Portuguese;
  • English fluency.

Currently Expanding My Skills In:

  • Firebase: As the back-end solution for freelancing and entrepreneurial projects;
  • Stripe: To enable payment, onboarding, and payout functionalities in marketplaces;
  • Test Automation: With React Native Testing Library for integration tests and Maestro for end-to-end tests.

CONTACT

  • City: Botucatu, State of São Paulo, Brazil
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  1. universal-react-native-app universal-react-native-app Public

    Building an universal app built with Expo and capable of running on Web, Android and iOS

    TypeScript

  2. multi-tenant-dashboard-nextjs-sass multi-tenant-dashboard-nextjs-sass Public

    A Multi-Tenant SAAS Dashboard where users can create an account and manage their customers and invoices. It is based on the Next Learn Course, the official Next.js Course created by Vercel and whic…

    TypeScript 15 10

  3. Node.js-Express-and-MongoDB-APIs Node.js-Express-and-MongoDB-APIs Public

    These are my Back-End RestFul API projects made during my Node.js and MongoDB course by LuizTools.

    JavaScript

  4. ai-powered-chatbot ai-powered-chatbot Public

    This is a ChatBot AI-Powered project I made to explain about the CloudWalk's Self Driven Bank project, based on OpenAI's GPT technology using the OpenAI API.

    HTML

  5. diplomas-certificates-certifications diplomas-certificates-certifications Public

    These are my diplomas and certificates

    HTML