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Start with domain experience, not the size of the portfolio. Ask to see a couple of projects that resemble your stack, and then find out which engineers actually built it. A serious vendor will introduce you to the tech lead. Answers that name nobody at this stage almost always mean you are talking to a reseller.

The paperwork needs a slower read than the pitch. A few clauses carry most of the weight: assignment of intellectual property, non-disclosure, and exit terms and handover. Everything produced has to transfer to you on payment, together with documentation, pipelines and deployment scripts. Be careful with language that leaves so-called reusable libraries with the vendor, since it is usually the dependency that makes switching painful.

Ask how they estimate. request a project estimate 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 scope is genuinely frozen; when the scope is still moving the supplier pads the number and you fund the buffer regardless. A time-and-materials model puts the risk on your side, so it demands visible weekly reporting and angular software development company a spending cap.

Process matters more than headcount. Ask how change requests are handled, who writes the acceptance criteria and how testing is organised. A mature team will be able to show you a live build at the end of each sprint. Acceptance criteria in writing stay the only reliable protection against the it-was-never-in-scope conversation.

Last, plan for custom crm development company the day you no longer need this vendor at the start rather than at the end. Ask that the code repository stays under your account from day one, and better than php that documentation is updated as part of the work. A provider confident in its own work says yes immediately; a long negotiation over it tells you quite a lot.