A quote that comes back within a day should be treated as a warning, not a service level. A competent team will come back with a list of questions: about who owns the data and what happens on failure. A supplier that prices without asking anything is probably working from a template, and that guess becomes a change request later — on your budget.
Look out for a gap between the people you meet and the people who will code. Insist on specific people rather than roles in the contract, with wording that requires notice before anyone is swapped. A provider that will only describe roles and azure web development company never names people is reserving the right to assign anyone it likes.
Require the source repository from the start. A team that shows code only at milestones expects you to accept a black box. Visible commits show you how many people are really working far better than a slide deck. The same holds for the CI pipeline: if it does not exist, promises about quality are unverifiable.
Vague contract language around IP is rarely an accident. The contract must state in plain terms that all deliverables belong to the client upon settlement of the relevant invoice. Check also the jurisdiction and the milestone terms: a large upfront payment with no deliverable attached eliminates the only leverage you have.
Lastly, rust erp look at how they communicate. Ask how many hours you will share with your working day, which named person handles your questions to ask a software development company and on what response times. Some genuine overlap is normally sufficient; none at all converts a five-minute question into a lost day. Unclear written communication in the proposal rarely improves once the work starts.