How to create custom layer on top of OpenstreetMap on server side?

Question

OpenStreetMap

The task is as follows: You need to place your objects (point symbols of several types) and links between them (lines)
on top of the map (local, using a local tile server with a fragment of the desired region). There can be up to 10,000 objects, or even more.
It is necessary that all this be processed on the server and displayed in the browser as a separate layer on top of the map and work autonomously on the server, regardless of third-party services and tools. It is necessary to minimize the time to load the page and the load on the browser.
What is the best way to organize this?

We need more specifics in what format and where it is best to store the coordinates (they are on a third-party server in some kind of subd in an incomprehensible format and they still most likely will have to be automatically transferred to the right place in the right format), which programs are best to use etc. Better yet, links to some articles and / or manuals on the topic with examples and / or descriptions of how to configure everything.

A lot of things are found how to implement something similar in the browser using Leaflet, but this is not entirely suitable. It is necessary to minimize its role and shift the maximum work to the server.

PS Paid solutions are not considered yet...

Answer 1

https://mapserver.org
geoserver.org