There are a number of SaaS and other offerings that offer C drivers. E.g. postgres, mongodb, oracle, snowflake all have C drivers or company-backed C work that

There are a number of SaaS and other offerings that offer C drivers. E.g. postgres, mongodb, oracle, snowflake all have C drivers or company-backed C work that isn't embedded systems. But as "framework" level code, I would expect pretty extensive knowledge and experience requirements.