A quote that comes back within a day is a warning, not a service level. An experienced provider returns clarifying questions before any number: about who owns the data and what happens on failure. A vendor that prices with no clarification is guessing, and custom crm and erp automation solutions a guess will be corrected later — on your budget.
Look out for a mismatch between the engineers on the sales call and the people who will code. Ask for named engineers in the statement of work, with a provision that requires notice before anyone is swapped. A provider that will only describe roles and refuses to name specific engineers is reserving its own flexibility at your cost.
Require the source repository from the first week. A partner that shows a build only at the end of each phase expects you to trust a black box. Daily commits reveal the actual pace far better than a slide deck. The same holds for the CI pipeline: nodejs vs laravel if it does not exist, quality claims are unverifiable.
Loose contract language around code ownership is never an accident. The agreement needs to state explicitly that all deliverables belong to your affiliate software development company as they are paid for. Check also which country's law applies and the payment schedule: a large upfront payment with no milestone tied to it takes away any leverage you would otherwise keep.
Last, pay attention to the working rhythm. Establish what overlap you will share each day, who answers your questions and how quickly. Four hours of overlap generally works; no overlap stretches every clarification into a twenty-four hour round trip. Sloppy written English in the proposal rarely improves later.
