Thiago Vieira da PazFullstack Developer

Development and evolution of the mobile app for individual customers (PF), focused on performance, scalability, and code quality. Active participation in building new modules, structural improvements, and the app redesign, working closely with backend, product, and design teams.

• Development and maintenance of the PF mobile app using React Native with Expo
• Creation of new modules and features following mobile architecture and performance best practices
• Active participation in the redesign and evolution of the app experience
• API integration and direct collaboration with the backend team on contracts and performance improvements
• Backend service development using Java and Spring Boot

Technologies: React Native, Expo, Java, Spring Boot

Acted as technical lead on the migration of legacy Delphi systems to a modern architecture based on Node.js (backend) and React.js (frontend). Coordinated a cross-functional team, fostering collaboration and driving the technology transition through technical mentorship, design pattern definition, scalable software architecture, and cloud services (AWS).

• Led the entire migration of a legacy Delphi system to Node.js, from architecture design to production deployment
• Rewrote 100% of the codebase using Node.js with the Express framework
• Technical management of the team, distributing tasks across two senior developers, one junior, and one intern
• Defined best practices, led code reviews, and tracked delivery
• Structured the application around microservices on AWS

Technologies: ReactJS, React Native, NodeJS, PHP, Delphi

Development and maintenance of an omnichannel platform using React, performing incremental migrations to a modern architecture based on React and NestJS.

• Adopted modular architecture and design patterns
• Integrated with the Meta API to unify support channels (WhatsApp Business)
• Contributed to scalability and code quality through technical reviews and automated tests

Technologies: ReactJS, PHP (CodeIgniter), ChatBot, Meta API, WhatsApp Business API

Designed and developed new products centered on user KPIs, leveraging artificial intelligence for data analysis and insights, with React (Next.js) and Python.

• Adopted TDD and DDD methodologies
• Significantly reduced development time and bug-fix turnaround

Technologies: React (Next.js), Python (Flask), GPT-3

Specialized in building React Native applications, with proficiency in Kotlin and Swift, plus ReactJS (including Next.js), focused on developing and improving applications.

• Maintenance and improvement of existing systems
• Focused on meeting evolving product needs and standards

Technologies: React Native (Kotlin, Swift), Node.js (Express, Adonis, Nest), PHP, ReactJS (Next.js)

Built features and maintained the ecosystem for two products, including refactoring systems previously based on Ruby on Rails to PHP and Next.js.

• Increased performance by 35% by implementing TDD and DDD methodologies
• Contributed to clean, scalable code

Technologies: React Native (Kotlin, Swift), Ruby on Rails, PHP, ReactJS (Next.js)

Built new features and maintained existing code, ensuring stability and security, in collaboration with designers and product managers.

• Adopted agile practices with regular unit and integration testing
• Integrated Clean Architecture principles into the development workflow

Technologies: React Native (Kotlin, Swift), PHP (Zend Framework), ReactJS

Following the migration of 50+ Government of Ceará websites to WordPress Multisite, handled tickets and phone support, identifying and resolving technical issues.

• Supported users, explaining platform functionality and applying fixes as needed
• Developed and implemented new site-specific features per public agency requirements

Technologies: PHP, JavaScript, jQuery, HTML, CSS, MySQL

Specialist in building systems, websites, and applications, with expertise in backend (NodeJS or PHP/Laravel), frontend (ReactJS, Next.js, Gatsby), and mobile (React Native, iOS, Android), plus e-commerce and WordPress.

• Multiple satisfied clients with shipped products
• Infrastructure setup and migration

Technologies: PHP, NodeJS, React Native, ReactJS, Angular, IONIC, .NET, Python

Built websites and systems, providing level-2 support to clients through the company's Service Desk platforms, specialized in resolving complex issues.

• Increased AdSense revenue by 20% on a project
• Proficiency in ad optimization, content strategy, and digital marketing

Technologies: PHP (WordPress, Magento, Joomla, Drupal), HTML, CSS, jQuery