Builders and especially less technical people need an easier way to ingest on-chain data and power their applications. It can also be used a system for anyone to create dashboards with no code or regular crypto natives to add their own support for protocols where their tokens are without needing to wait for developers to add support on their portfolio tracker.
Rust (https://github.com/actix/actix-web) or typescript (https://github.com/fastify/fastify). Etherscan API to fetch ABI, and we can cache ABIs to reduce reliance on etherscan.