Full Stack Developer — AI Character Chat Platform (Full-time / Long-term / Remote)

We are building an AI-powered character chat platform where users can create, customize, and interact with AI characters. The platform features subscription management, token-based transactions, real-time chat, image and video generation, and comprehensive analytics. Our backend is built using a microservices architecture with both Node.js and Python services. The product is already live, and you will be joining an existing team. Tech Stack Requirements - Frontend (Must Have): * React 18+ with TypeScript * React Router for navigation * Tailwind CSS for styling * State management * Real-time features and animations * Responsive design and a mobile-first approach Backend (Must Have): * Node.js with TypeScript * Python for microservices * Fastify framework (Node.js) * PostgreSQL database * RESTful API design * Microservices architecture Additional Technologies (Nice to Have): * Python frameworks (FastAPI, Flask, or similar) * Socket.io for WebSocket connections * Redis for caching * Docker for containerization * AWS services (S3, CloudFront, EC2) * Analytics integration (Amplitude, Facebook Pixel) Key Responsibilities - Frontend Development: * Build and maintain user-facing React applications * Develop responsive UI components and pages * Implement form handling and validation * Integrate real-time features and third-party services * Create an admin dashboard for system management and analytics Backend Development: * API Development * RESTful API endpoints for all features (Node.js and Python) * Authentication and authorization * Request validation and error handling * Rate limiting and security Database Design and Management: * Schema design and optimization * Prisma migrations * Query optimization * Data relationships and integrity Microservices Integration: * Service-to-service communication (Node.js and Python services) * Error handling and circuit breakers * Caching strategies * Webhook handling Required Skills and Experience - Must Have: * 5+ years of full-stack development experience * Strong proficiency in React and TypeScript * Strong proficiency in Node.js and TypeScript * Experience with Python for microservices development * Experience with Fastify, or willingness to learn quickly * Experience with Prisma ORM * Experience with PostgreSQL * Experience building RESTful APIs * Experience with responsive web design * Good understanding of async/await and Promise handling * Experience with Git and version control Nice to Have: * Microservices architecture (Node.js and Python) * Python frameworks (FastAPI, Flask, Django) * Real-time features (WebSockets, Socket.io) * Subscription-based applications * Analytics integration * Docker and containerization * AWS services * Payment processing systems * AI/ML integrations What We Are Looking For - * Problem-solving skills: ability to debug complex issues and find efficient solutions * Code quality: write clean, maintainable, well-documented code * Communication: clear communication in English, with regular * progress updates * Self-motivated: able to work independently and take ownership of features * Attention to detail: pixel-perfect implementations and careful handling of edge cases * Testing mindset: write tests and ensure code quality before deployment