If more than one client must talk to the same business rules—web, mobile, partner, shop—you need a backend with a clear API, not logic trapped in a page.
Signs you are ready
- The same rule is copied in two places
- A partner asks for a stable interface
- You plan a mobile app on the same data
- AI or automation must call your systems safely
We build this under API & Backend Development, often next to application or AI work.