Customer-Facing Real-Time API Development

I need an end-to-end build of a public API that my customers can call directly. Its first job is to push real-time updates from our platform; the rest of the dataset is still being defined, so the codebase must be modular and easy to extend... (Budget: ₹37500 - ₹75000 INR, Jobs: API Development, CI/CD, Cloud, Data Modeling, Documentation, GraphQL, Microservices, Security)