i'm also using a "type safe" templating engine (for kotlin, as a gradle plugin) of my own design that goes the other way - instead of embedding a model class into the template, a template class is generated that takes all the values as parameters.

i.e. MyTemplate.tpl.html

    {if $foo}hello world, {$myname}!{else}goodbye, world.{/if}

    MyTemplate(
      foo = true,
      myname = "bar"
    ).toString()

https://codeberg.org/h34tnet/tempolin

warning: so far i'm the only user though, so don't use it in production. also, i'm working on some improvements right now which haven't been pushed yet.