Begin with domain experience, not the length of the client list. Request three or four case studies that sit close to your technology stack, react native development agency and then ask specifically who actually wrote that code. A serious vendor php portal development will put you on a call with the tech lead. Evasive answers at this stage almost always mean the demo work came from somewhere else.

The contract deserves a slower read than the pitch. Three clauses do most of the work: assignment of intellectual property, non-disclosure, and termination and handover. Everything produced has to transfer to you once invoices are settled, along with designs, scripts and infrastructure configuration. Be careful with any clause that keeps reusable components in the vendor's hands, typescript web framework because this is frequently the part you cannot replace later.

Ask how they estimate. A serious estimate comes with a written set of assumptions, government it software a task-level breakdown and an explicit range. A fixed-bid deal is only reasonable when the scope is genuinely frozen; otherwise the supplier pads the number and you fund the buffer regardless. Time and materials puts the risk on your side, so it needs a cap, regular demos and transparent reporting.

Process beats headcount. Ask how a new requirement enters the plan, who defines done and how quality assurance works. A mature team should be able to walk you through a live build at the end of each sprint. Acceptance criteria in writing stay the only reliable protection against an argument at delivery time.

Before signing, consider the end of the engagement at the start rather than at the end. Insist that the source repository stays on infrastructure you own from day one, and that documentation is written as you go rather than left to the end. A vendor with nothing to hide accepts it without argument; resistance at this point reveals most of what you need to know.