Start with domain experience, not the number of logos on the website. Ask for typescript web development service three or four case studies that sit close to your technology stack, and then ask which engineers actually built it. A solid partner will introduce you to the engineers. Evasive answers at this stage generally mean you are talking to a reseller.
The agreement needs more scrutiny than the proposal. Three sections matter more than the rest: assignment of intellectual property, confidentiality, and notice periods and handover. All the work product must transfer to you as it is paid for, together with documentation, pipelines and aws web development company deployment scripts. Watch for any clause that leaves reusable components outside the transfer, because that is often exactly the piece that locks you in.
Ask where their numbers come from. A credible estimate arrives with the assumptions behind it, a breakdown per feature and a best case and a worst case. A fixed price is only reasonable when the requirements are stable and documented; software development company in uae any other case the provider pads the number and you pay for uncertainty either way. Time and materials moves the risk back to the client, so it needs visible weekly reporting and blockchain web development company a spending cap.
The delivery process beats the number of developers. Find out what happens when the scope changes, who defines done and how testing is organised. A team can walk you through a live build at the end of each sprint. Written acceptance criteria are the practical protection against endless rounds of rework.
Before signing, plan for the day you no longer need this vendor while the relationship is still good. Require that the repository sits on infrastructure you own from the first commit, and that documentation is written as you go rather than left to the end. A provider confident in its own work will agree quickly; resistance at this point tells you quite a lot.