Investiga+ 🚀

Investiga+ is a SaaS platform for CNPJ intelligence and company data analysis, created by Gustavo Marques under the DevFlow Labs ecosystem.

🌍 Live: https://investigamais.com

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Overview

Investiga+ was built as a production-oriented SaaS case study focused on secure authentication, company data lookup, user history, API integration, caching and a modern responsive dashboard.

The project demonstrates end-to-end product engineering: architecture, backend, frontend, database modeling, automated tests, deployment and maintainability.

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Core Features

• Secure authentication with JWT + HttpOnly Cookies
• CNPJ lookup with external API integration
• Local cache strategy for repeated searches
• Search history by user
• User profile and usage management
• Responsive dashboard UI
• Modular backend architecture
• Automated tests with Jest
• Docker and CI/CD-ready structure

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Tech Stack

Frontend

• Next.js
• React.js
• Chakra UI
• Framer Motion

Backend

• Node.js
• Express.js
• Prisma ORM
• REST APIs
• JWT authentication

Database

• PostgreSQL
• SQLite for local development

Quality & DevOps

• Jest
• Docker
• GitHub Actions
• Railway

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Architecture

Next.js frontend
  └── Dashboard
  └── Auth flows
  └── History and profile pages

Node.js + Express backend
  └── Auth module
  └── CNPJ consultation module
  └── History module
  └── Validation and error handling

Database
  └── Prisma ORM
  └── PostgreSQL / SQLite
  └── User, history and cached company records

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Security

• JWT authentication using HttpOnly Cookies
• Protected routes through backend middleware
• User-scoped records
• Centralized error handling
• Environment-based configuration

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Testing

The project includes automated tests focused on backend reliability, controller behavior, validation scenarios and integration boundaries.

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Why this project matters

Investiga+ is a complete SaaS product case that shows practical experience with product thinking, fullstack architecture, API integration, authentication, database modeling, testing and deployment.

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Author

Created and developed by Gustavo Marques de Lima as part of the DevFlow Labs product ecosystem.

• DevFlow Labs GitHub: https://github.com/devflow-modules
• LinkedIn: https://www.linkedin.com/in/gustavo-marques-00
• GitHub: https://github.com/gustavomarques00
• Portfolio: https://devflowlabs.com.br
• Email: gustavomarquesmm@gmail.com