A number produced without questions counts as a warning, not a service level. A competent team will come back with questions first: about who owns the data and what happens on failure. A vendor that prices without asking anything is probably guessing, and that guess becomes a change request later — on your budget.
Watch for any distance between the dedicated development team in the pitch and those who eventually appear in the repository. Request named engineers in the agreement, with wording that requires notice before anyone is swapped. A vendor that will only describe a pool of resources and custom rust development never names people is keeping the option to staff you with whoever is free.
Insist on access to the repository from the first week. A partner that hands over nothing between demos is inviting you to trust a black box. Visible commits reveal how many people are really working far better than a slide deck. The same holds for the CI pipeline: if nothing runs automatically, kotlin web development company quality claims remain nothing more than words.
Loose wording in the contract around code ownership is never a formality. The document needs to state in plain terms that the code, designs and documentation become the property of your business upon settlement of the relevant invoice. Also check the governing law and hire vue storefront developer the payment schedule: a request for most of the money up front with nothing due in return for weeks eliminates the only leverage you have.
Last, pay attention to how they communicate. Establish how many hours you will share with your working day, which named person handles questions and how quickly. Four hours of overlap generally works; zero overlap converts each small question into a twenty-four hour round trip. Careless writing in the proposal will not improve once the work starts.
