Begin with domain experience, not the number of logos on the website. Ask for three or four case studies that resemble your stack, and then ask whether those engineers are still with the company. A solid partner is happy to connect you with the engineers. Vague answers at this stage usually mean you are talking to a reseller.

The agreement needs a slower read than the pitch. Three sections matter more than the rest: ownership of the code, non-disclosure, and exit terms and handover. All the work product must transfer to you as it is paid for, along with source code, designs difference between laravel and symfony infrastructure as code. Watch for any clause that keeps so-called reusable libraries outside the transfer, because that is often the part you cannot replace later.

Ask how they estimate. A credible estimate arrives with a written set of assumptions, a breakdown per feature and a best case and a worst case. A fixed-price contract works only when the scope is genuinely frozen; when the scope is still moving the provider adds a risk premium and you fund the buffer regardless. A time-and-materials model moves the risk back to the client, azure consulting services so it requires visible weekly reporting and a spending cap.

The delivery process matters as much as the number of developers. Establish how a new requirement enters the plan, who defines done and what the QA setup looks like. A well-run team will be able to show you a live build at the end of each sprint. Acceptance criteria in writing remain your only real protection against an argument at delivery time.

Before signing, think about the end of the engagement before it becomes urgent. Insist that the source repository stays in your organisation 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 says yes immediately; a long negotiation over it tells you quite a lot.