Backend Development for SaaS Application

I already have a SaaS application frontend for an ERP-like platform. I need a SaaS architect who can build the backend foundation, help choose a framework, set up CI/CD, guide on the stack, and add backend APIs. The ideal candidate will have experience in SaaS applications and be proficient in backend development, API integration, and notification systems. You'd also need to integrate LLMs like Claude and leverage that in your development process for faster cycle time. Note: Knowing the frontend is a plus, as you might sometimes want to update the UI yourself to match the API. Our preferred stack is AW, NodeJS, and NextJS, but we're open to other options. You'd create: - APIs and middleware - Reusable Utilities - CI/CD pipeline (we use BitBucket) - Service/repository layers with tenant-based authorized data access - Integrate external APIs and create jobs (where needed) to be fed to the dashboard - Some widgets would require a WebSocket for real-time charts - Some searches need to be made more advanced using LLMs and NLP - RDBMS/DocumentDB design