Fluvio is an open source data pipeline project [1] w/ plugin wasm modules for data transformations as "SmartModules"[2]. In our case we can run wasm plugins on frontend or backend (none of which require a browser). Feel free to come by our Discord if you have any questions. Disclosure: I work as a engineer for Infinyon backing the project.
[1] https://github.com/infinyon/fluvio
[2] https://www.fluvio.io/smartmodules/