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GabrielMesquitaOliveira/README.md

Hi there! 👋 I'm Gabriel Mesquita

🚀 Senior Full Stack Developer | Legacy Systems Modernization Expert

Bridging the gap between legacy mainframe systems and modern cloud architecture

🏦 Currently working at Caixa Econômica Federal - Brazil's largest public bank
🔧 Specialized in COBOL → Java Quarkus migration and Angular applications
💳 Focused on Payment Methods and Credit Card systems serving millions of users daily

🛠️ Tech Stack

Legacy Systems:

COBOL Mainframe DB2

Modern Stack:

Java Quarkus Angular TypeScript

Full Stack:

React Vue.js Node.js PHP Laravel

Mobile & DevOps:

Kotlin Docker AWS

💼 Professional Focus

  • 🏛️ Banking & Fintech - Mission-critical applications processing millions of transactions
  • 🔄 Legacy Modernization - Migrating COBOL mainframe systems to modern microservices
  • 📱 Mobile Banking - Android apps with biometric auth and advanced security
  • 🇧🇷 Government APIs - eSocial, ETV integrations for compliance systems
  • 🛒 E-commerce - High-performance solutions across 7+ platforms (WooCommerce, Shopify, VTEX, etc.)

🏆 Certifications & Recognition

  • 🥇 IBM Mainframe Developer Professional Certificate
  • 🥇 IBM z/OS Mainframe Practitioner
  • ⚡ CAIXAVERSO Dev Back-end Java Level III
  • 📐 Angular 17 Specialization
  • 🌐 7 E-commerce Platform Certifications

📫 Let's Connect!

"Transforming legacy systems into modern, scalable solutions while maintaining the reliability that businesses depend on."

⭐ Fun fact: I'm one of the few developers who can write COBOL in the morning and React in the afternoon! 💻

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  1. EasyCrawler EasyCrawler Public

    Multi-threaded Java web crawler library with flexible search strategies and configurable persistence options. Published on Maven Central, features intelligent crawling with politeness controls, cus…

    Java 7

  2. AnimeList AnimeList Public

    High-performance anime rating aggregator API built with Quarkus that combines scores from MyAnimeList, IMDb, and Rotten Tomatoes into a unified REST endpoint. Features web scraping, H2 persistence,…

    Java

  3. caixa-app caixa-app Public

    Mobile banking app developed for Caixa Hackathon featuring loan management, financial overview dashboard, and payment tracking. Built with React Native, TypeScript, and Expo for cross-platform iOS/…

    HTML

  4. Pratinho Pratinho Public

    PHP