Mariel Desailly

Begin with domain experience, not the size of the portfolio. Ask for a couple of engagements that sit close to your technology stack, and then ask specifically whether those engineers are still with the company. A serious vendor will introduce you to the tech lead. Vague answers at this stage usually mean the demo work came from somewhere else.

The contract warrants more scrutiny than the proposal. 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, along with documentation, pipelines and deployment scripts. Look closely at any clause that leaves framework code in the vendor's hands, since this is frequently the part you cannot replace later.

Find out how the estimate was built. An honest estimate comes with a list of assumptions, a breakdown by feature or retail ecommerce software development services module and a best case and a worst case. A fixed price only makes sense when the requirements are stable and docker web development company documented; in any other case the supplier pads the number and you fund the buffer regardless. Time and materials shifts that risk to you, so it requires a sprint cadence, demos and a budget cap.

How the work is run matters as much as team size. Establish what happens when the scope changes, who defines done and how quality assurance works. A team will be able to walk you through a working build every one or two weeks. Acceptance criteria in writing remain the only reliable protection against an argument at delivery time.

Finally, think about the end of the engagement before it becomes urgent. Insist that the repository stays on infrastructure you own from the first commit, and that documentation is updated as part of the work. A provider confident in its own work will agree quickly; hesitation here tells you a great deal.