I will build full stack web app with react nextjs nodejs ai saas API integration

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Charles W
build full stack web app with react nextjs nodejs ai saas API integration
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build full stack web app with react nextjs nodejs ai saas API integration

About this gig

Looking for a senior full-stack software engineer to build a modern, scalable, and high-performance web application?


With 8+ years of professional experience building enterprise software, SaaS platforms, APIs, dashboards, and cloud-based applications, I develop reliable solutions using modern technologies and best engineering practices. My experience includes React, Next.js, Node.js, TypeScript, Python, PostgreSQL, AWS, Docker, Kubernetes, OAuth integrations, and AI-assisted development workflows.


Services include:

  • Full Stack Web Applications
  • React & Next.js Development
  • Node.js Backend Development
  • REST & GraphQL APIs
  • Authentication (OAuth, JWT)
  • Dashboard Development
  • SaaS MVP Development
  • AI-Powered Applications
  • Third-Party API Integration
  • Database Design
  • Performance Optimization
  • Bug Fixes & Feature Development
  • Responsive UI
  • Cloud Deployment


You'll receive clean, scalable, maintainable code with security, performance, and future growth in mind.


Let's build a fast, modern web application that delivers real business value.

  • Programming language

    • Python

  • Expertise

    • Debugging
    • Performance
    • Security
    • Design
    • Databases

  • Frontend framework

    • Next.js
    • React.js
    • Tailwind CSS
    • Vue.js

  • Backend framework

    • Django
    • Express.js
    • FastAPI
    • NestJS
    • Next.js

  • AI & low/no code builders

    • Claude
    • Cursor

Get to know Charles W

Charles W

Senior Software Engineer

  • FromUnited States
  • Member sinceJul 2026

  • Languages

    English, French, Spanish, German, Italian
I am a Senior Software Engineer with over 8 years of experience designing and delivering API-first, full-stack platforms. I specialize in building secure, scalable applications handling sensitive PII and financial data, leveraging AI-assisted tools like GitHub Copilot to accelerate delivery and maintain high code quality.

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