Claude API Developer for AI Assistant

We need an experienced developer to build a client-facing AI assistant powered by Anthropic’s API. The assistant should understand user requests, retrieve relevant information, perform selected business actions, and provide helpful responses within defined permissions. The work includes API integration, backend development, API connections, prompt and workflow architecture, authentication, error handling, and production deployment. Experience with Anthropic API, Claude, Node.js, MCP, REST APIs, and AI-agent architecture is highly desirable.