A number produced without questions is a bad sign. A competent dedicated web team will come back with clarifying questions before any number: about who owns the data and what happens on failure. A provider that prices before understanding the scope is guessing, and a guess resurfaces as a change order — and you will pay for it.
Watch for node js development services any distance between the people you meet and the hire developers in dubai actually assigned. Request specific people rather than roles in the statement of work, with a provision covering replacement. A provider that will only describe abstract roles and refuses to name individuals is preserving its own flexibility at your cost.
Ask for the source repository from day one. A provider that shows nothing between demos is asking you to take delivery on faith. Regular commits and pull requests tell you who is really on the project far better than a slide deck. This extends to the build and deployment setup: if nothing runs automatically, assurances about quality are just talk.
Ambiguous wording in the contract around intellectual property is not an accident. The contract needs to state in plain terms that the code, designs and documentation transfer to your company on payment. Also check the jurisdiction and the milestone terms: heavy prepayment with no milestone tied to it eliminates your only leverage.
Last, look at how they communicate. Confirm how many hours you will share with your timezone, who is expected to answer day-to-day questions and on what response times. A few hours of overlap generally works; no overlap turns a five-minute question into a day of delay. Careless writing in the sales phase does not improve under delivery pressure.