Small bug-fix project

We’re looking for an experienced Full Stack Developer to troubleshoot and fix bugs in an existing AI-powered SaaS web application. The project is already developed, so this is not a ground-up development project. We need someone who can quickly identify technical issues, implement clean fixes, and ensure the application works reliably across the affected features. What You’ll Work On: •⁠ ⁠Fix React and Next.js frontend issues •⁠ ⁠Troubleshoot Node.js/API problems •Resolve UI, responsive design, and functionality bugs •⁠ ⁠Debug AI API integrations such as OpenAI or Claude •⁠ ⁠Fix authentication or user-access issues •⁠ ⁠Troubleshoot REST API and third-party integrations •⁠ ⁠Resolve database-related issues where required •⁠ ⁠Identify JavaScript/TypeScript errors •⁠ ⁠Improve performance of affected components •⁠ ⁠Test fixes and ensure existing functionality remains stable Required Skills: React • Next.js • Node.js • TypeScript • JavaScript • Full Stack Development • AI Integration • OpenAI API • Claude API • REST API • Bug Fixing • API Integration • SaaS Development • Web Application Development • PostgreSQL • MongoDB • GitHub What We're Looking For Someone Who Can: ✓ Quickly diagnose the root cause instead of applying temporary fixes ✓ Understand an existing codebase and work without extensive hand-holding ✓ Make clean, maintainable changes ✓ Communicate clearly about the issue and proposed solution ✓ Test fixes before delivery ✓ Avoid introducing regressions into existing functionality Project Details: Budget: $100–$150 fixed price Timeline: 2–3 days Start: Immediate If the initial fixes go well, there may be opportunities for additional React, Next.js, AI integration, SaaS development and ongoing bug-fixing work. When applying, please share: •⁠ ⁠A relevant React/Next.js or AI SaaS project •⁠ ⁠The type of bugs or technical issues you've resolved •⁠ ⁠Your availability to start