Look first at domain experience, not the number of logos on the website. Request two or three engagements that sit close to your stack, and then ask which engineers actually built it. A serious vendor is happy to connect you with the tech lead. Answers that name nobody at this stage usually mean the demo work came from somewhere else.
The agreement deserves more attention than the sales deck. Three clauses do most of the work: intellectual property assignment, the NDA, and notice periods and handover. All the work product must transfer to you once invoices are settled, including documentation, pipelines and deployment scripts. Be careful with wording that leaves so-called reusable libraries with the vendor, since it is usually the part you cannot replace later.
Find out how the estimate was built. A serious estimate arrives with a list of assumptions, a breakdown by feature or module and a range rather than a single number. A fixed price works only when the requirements are stable and documented; when the scope is still moving the provider pads the number and should you outsource or hire in house pay for it anyway. Time and materials moves the risk back to the client, so it requires a sprint cadence, demos and software development process a budget cap.
How the work is run matters more than team size. Establish how change requests are handled, who writes the acceptance criteria and how quality assurance works. A well-run team can walk you through running software development companies in qatar rather than status reports. Clear, written acceptance criteria remain the only reliable protection against an argument at delivery time.
Last, azure software development company think about the day you no longer need this vendor while the relationship is still good. Require that the source repository stays under your account from the beginning, and that the documentation is refreshed in every sprint. A provider confident in its own work will agree quickly; hesitation here tells you quite a lot.