Senior Full-Stack Developer (React + Python) — API & Bug Fixes

I’m looking for an experienced Full-Stack Developer with strong React and Python skills to review, debug, and improve an existing web application. The application is already set up and actively being developed, so this is not a from-scratch project. I need someone who can jump into an existing codebase, quickly understand how the frontend, backend, database, and APIs are connected, identify issues, and implement clean, reliable fixes. The main focus will be codebase review, bug fixing, API development/integration, backend improvements, and frontend functionality. I’m looking for someone who is comfortable taking an existing project and saying, “I understand what’s happening here, here’s what needs to be fixed, and here’s the cleanest way to fix it.” What You’ll Be Working On Audit and review the existing codebase Identify bugs, broken functionality, and inconsistent logic Debug existing frontend and backend issues Fix React/JavaScript/TypeScript functionality Frontend React.js JavaScript / TypeScript Modern frontend development API consumption and integration State management Debugging browser/network issues Responsive UI functionality Backend Python REST APIs API endpoint development and debugging Backend business logic Authentication and authorization Error handling and validation Database integration Ideal Developer You’ll be a strong fit if you: Have solid professional experience with React + Python Have worked extensively with existing/legacy codebases Are confident debugging full-stack applications