Begin with relevant experience, not the number of logos on the website. Ask to see three or business process automation company four projects that resemble your domain and your web development tech stack, and then ask specifically whether those engineers are still with the real estate app development company. A serious vendor will introduce you to the engineers. Answers that name nobody at this stage generally mean the demo work came from somewhere else.

The paperwork needs more scrutiny than the proposal. Three clauses do most of the work: assignment of intellectual property, confidentiality, and termination and handover. All the work product has to transfer to you on payment, together with documentation, pipelines and deployment scripts. Be careful with wording that leaves framework code with the vendor, since this is frequently exactly the piece that locks you in.

Ask where their numbers come from. A serious estimate comes with a written set of assumptions, a task-level breakdown ios and android app development company a best case and a worst case. A fixed price is only reasonable when the specification is complete; when the scope is still moving the vendor pads the number and you pay for it anyway. A time-and-materials model puts the risk on your side, so it demands visible weekly reporting and a spending cap.

How the work is run beats team size. Ask how change requests are handled, who signs off on a feature and how quality assurance works. A team will be able to walk you through a working build every one or two weeks. Written acceptance criteria are the only reliable protection against the it-was-never-in-scope conversation.

Finally, plan for the handover before it becomes urgent. Insist that the repository stays on infrastructure you own from day one, and that a readme and architecture notes are kept current as the code changes. A vendor with nothing to hide says yes immediately; hesitation here reveals a great deal.