Senior Full stack

Senior Full Stack Developer (AI & Automation) – Healthcare Marketplace We're looking for an experienced Senior Full Stack Developer to help complete and launch our AI-powered healthcare marketplace. The core platform has already been built using Base44, and we need someone to finalize the remaining features, improve the UI/UX, fix bugs, optimize performance, and prepare the application for production. Responsibilities * Complete frontend and backend features. * Improve UI/UX and overall user experience. * Fix bugs and optimize performance. * Refactor and improve existing code. * Integrate AI features, automations, and third-party APIs. * Ensure security, scalability, and production readiness. * Collaborate on technical decisions and recommend improvements. Requirements * Strong Full Stack development experience. * Experience with AI integrations, AI agents, or workflow automation. * Experience with Base44 is preferred (or the ability to learn it quickly). * Strong problem-solving and debugging skills. * Good communication and attention to detail. This is a project-based freelance role with the potential for long term collaboration as we continue expanding the platform. Preferred Tech Stack #FullStack #AI #Base44 #React #NextJS #TypeScript #NodeJS #NestJS #Python #FastAPI #MongoDB #PostgreSQL #OpenAI #Claude #Gemini #LangChain #LangGraph #RAG #AIAgents #n8n #Automation #RESTAPI #Docker #AWS #TailwindCSS #ShadcnUI #Stripe #WebSockets #UIUX #PerformanceOptimization