A number produced without questions is a bad sign. An experienced provider returns a list of questions: about who owns the data and what happens on failure. A provider that commits to a figure before understanding the scope is probably pricing a guess, and that guess becomes a change request later — on your budget.
Be wary of a gap between the team in the pitch and the developers actually assigned. Request named engineers in the agreement, with a clause about substitutions. A team that will only describe a pool of resources and will not commit to individuals is preserving its own flexibility at your cost.
Require commit-level visibility from day one. A partner that delivers a build an affiliate platform only at the end of each phase is asking you to trust a black box. Daily commits reveal the actual pace far better than a weekly report. The same holds for the automated test suite: if there is no pipeline, assurances about quality remain just talk.
Ambiguous wording in the contract around intellectual property is rarely a formality. The document must state in plain terms that the code, designs and top golang development companies documentation belong to the client on payment. Check also the jurisdiction and how payments are structured: heavy prepayment with no deliverable attached eliminates any leverage you would otherwise keep.
Finally, examine how they communicate. Confirm how much working-time overlap the teams will share with your timezone, which person handles questions and vue.js vs react on what response times. Some genuine overlap is normally sufficient; none at all stretches each small question into a day of delay. Careless writing in the proposal will not improve once the work starts.
