Freelance Fullstack Engineers in State of São PauloFreelance Fullstack Engineers in State of São Paulo
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Arthur Ziero's avatar
Arthur Ziero
São Paulo, Brazil
🚀 Software Development & Enterprise Applications
5.0
Rating
6
Followers
🚀 Software Development & Enterprise Applications
Cover image for Playfácil | Bug fixing for LMS Application
Playfácil | Bug fixing for LMS Application
0
25
Cover image for Klin | Custom Enterprise Application
Klin | Custom Enterprise Application
0
37
Cover image for ToFans | Fullstack Web Development
ToFans | Fullstack Web Development
0
19
Cover image for Rolezou | Fullstack Mobile Development
Rolezou | Fullstack Mobile Development
0
22
Fullstack Engineer(5)
Delger Davaa's avatar
Delger Davaa
São Paulo, Brazil
Fullstack Developer: Fast, Production-Ready Code
Fullstack Developer: Fast, Production-Ready Code
Cover image for Web Development for StepsInvesting
Web Development for StepsInvesting
0
21
Cover image for ReactNative Mobile App Development for StepInvesting
ReactNative Mobile App Development for StepInvesting
0
20
Cover image for Mobile App Development for TeleDoc
Mobile App Development for TeleDoc
0
15
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Fullstack Engineer(2)
André Felipe Rosa's avatar
André Felipe Rosa
São Paulo, Brazil
web develop build responsive and modern websites
New to Contra
web develop build responsive and modern websites
Cover image for Built an Educational SaaS MVP
Built an Educational SaaS MVP that transforms educational content into a modern digital experience. Developed the full-stack solution with a focus on usability, performance, scalability, and rapid product validation using React, Next.js, Node.js, and Firebase/Supabase.
0
16
Cover image for AI Keyword Generator SaaS A modern
AI Keyword Generator SaaS A modern SaaS platform built to automate keyword research for affiliate marketers, entrepreneurs and digital businesses. The application leverages intelligent keyword generation, multilingual support and scalable cloud-based architecture to help users discover profitable search terms for SEO, content marketing and paid advertising campaigns. Highlights: ✓ AI-Powered Keyword Research ✓ Multi-Language Support ✓ Affiliate Marketing Optimization ✓ Serverless Architecture ✓ Modern SaaS Dashboard ✓ Scalable Infrastructure Tech Stack: Node.js • JavaScript • APIs • Netlify Functions • SaaS Development This project demonstrates full-stack development skills, product design, API integration, cloud architecture and the ability to build real-world software solutions from concept to deployment.
0
72
Cover image for Task Management REST API Developed a
Task Management REST API Developed a RESTful API using Node.js and Express following clean architecture principles and separation of concerns. Features: • Create tasks • List tasks • Update task status • Delete tasks • Unique ID generation • MVC-inspired project structure Technologies: Node.js, Express.js, JavaScript, REST APIs Responsibilities: • Designed API endpoints • Implemented business logic layer • Structured project architecture • Tested endpoints using Postman Outcome: Created a scalable backend foundation that can be extended with authentication, database integration and deployment.
0
95
Cover image for FIVAM - Full Stack Frontend
FIVAM - Full Stack Frontend Application Developed the frontend for FIVAM, a web application built with React and Vite, focused on user authentication and integration with REST APIs. Key Features: • Secure JWT authentication • Protected routes • API integration • Responsive user interface • State management • Modern React architecture Technologies: React, Vite, JavaScript, JWT Authentication, REST APIs Responsibilities: • Frontend architecture • Authentication flow implementation • API consumption • User interface development • Application testing and debugging Outcome: Delivered a scalable frontend structure ready for production environments and future feature expansion.
0
101
Fullstack Engineer(4)
Diego Lopes's avatar
Diego Lopes
Sorocaba, Brazil
Building AI Agents & SaaS with Next.js
6
Followers
REPLIT_EXPERT

Expert

Building AI Agents & SaaS with Next.js
Cover image for PagueFlow: Personal Finance PWA (Built
PagueFlow: Personal Finance PWA (Built with Replit AI) A full-stack financial management application featuring expense tracking, dashboards, and authentication. Replit Development Workflow: AI-Driven Development: Heavily utilized Replit Ghostwriter to generate logic for the dashboard calculations and UI components (visible in Git history as "Assistant checkpoints"). Version Control: Managed the entire Git workflow directly via the Replit Git pane to track features and rollbacks. Integrations: Configured the connection with Supabase (Auth & Database) directly within the Replit environment variables and shell. Stack: TypeScript, Tailwind CSS, Supabase (Developed entirely in Replit).
1
88
Cover image for SaaS Platform: TENET AI (Built
SaaS Platform: TENET AI (Built on Replit) A multi-tenant AI agent platform developed entirely within the Replit ecosystem. Replit-First Workflow: Cloud IDE: Used Replit as the exclusive environment to build complex Python/FastAPI microservices without local setup. AI Assisted: Leveraged Replit Ghostwriter to accelerate boilerplate generation for the multi-agent orchestration logic. Debugging: Utilized the Replit Shell for real-time testing of WhatsApp API webhooks before pushing to production. Stack: Python, FastAPI, PostgreSQL. (Production deployed via Railway, Development via Replit).
0
102
Cover image for BudgetCalc - Smart Project Estimator
BudgetCalc - Smart Project Estimator
0
87
Cover image for Official Website: TENET AI (High-Conversion
Official Website: TENET AI (High-Conversion Landing Page) The public-facing portal and onboarding flow for the TENET AI ecosystem. Built with Replit: Rapid Prototyping: Used Replit's instant preview environment to iterate on the UI/UX design in real-time without local server setup. Frontend Performance: Optimized assets and code splitting directly within the Replit editor to ensure high Lighthouse scores. Zero-Config Dev: Leveraged Replit's pre-configured templates to jumpstart the development of the responsive layout. Stack: HTML5, Tailwind CSS, JavaScript (Developed in Replit).
0
112
Fullstack Engineer(3)
Fernando Freitas's avatar
Fernando Freitas
São Bernardo do Campo, Brazil
AI & ML Engineer | Full Stack, data-driven solutions expert
AI & ML Engineer | Full Stack, data-driven solutions expert
Cover image for Copilot | AI assistant for data exploration
Copilot | AI assistant for data exploration
3
10
Cover image for Insights AI | Web app for auto data analysis
Insights AI | Web app for auto data analysis
3
11
Cover image for 2048 | Full-stack replica in a web app
2048 | Full-stack replica in a web app
4
9
Cover image for Gmail AI | AI agent for email auto labeling
Gmail AI | AI agent for email auto labeling
3
20
Fullstack Engineer(3)
Eduardo Batalha's avatar
Eduardo Batalha
São Paulo, Brazil
Creative Fullstack Engineer 🚀
Creative Fullstack Engineer 🚀
Cover image for Adress Info Verificator app
Adress Info Verificator app
0
11
Cover image for Registration System
Registration System
0
0
Cover image for Product Management API
Product Management API
0
15
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Fullstack Engineer(2)