A quote that comes back within a day is a red flag rather than good service. Any serious team responds with clarifying questions before any number: about who owns the data and what happens on failure. A provider that prices without asking anything is simply guessing, and the gap resurfaces as a change order — and you will pay for it.
Look out for a mismatch between the people you meet and the hire remote developers actually assigned. Request specific people rather than roles in the contract, with why hire a dedicated team instead of freelancers clause that requires notice before anyone is swapped. A vendor that will only describe roles and refuses to name people is reserving the option to staff you with whoever is free.
Insist on access to the repository from day one. A partner that delivers nothing between demos expects you to trust a black box. Daily commits tell you the actual pace far better than a weekly report. This extends to the CI pipeline: if it does not exist, assurances about quality remain nothing more than words.
Ambiguous phrasing around IP is never an oversight. The contract must state plainly that all deliverables transfer to your company upon settlement of the relevant invoice. Also check the governing law and how payments are structured: heavy prepayment with no milestone tied to it eliminates your only leverage.
Last, vue vs livewire look at how they communicate. Establish what overlap the teams will share with your working day, which person handles day-to-day questions and on what response times. A few hours of overlap is normally sufficient; no overlap converts every clarification into a twenty-four hour round trip. Careless writing in the proposal does not improve once the work starts.