Begin with the reason this custom retail ecommerce software development should exist, not a feature list. What kind of user will use the system, how many times a day, and what happens today? A vendor who understands the goal will suggest a simpler way to reach it; a team that receives only the requirements as given prices exactly what you asked for.
Set out the scope as user stories or scenarios: hire freelance vuetify developer who does what, and what happens next. Just as important, write down what the first release deliberately excludes. A written out-of-scope list prevents more disagreement during acceptance than the rest of the brief combined. Mark too which decisions are settled and which are still open — honest teams price those differently, and concealing the open questions helps no one.
Set out your constraints. The list covers systems you must integrate with, existing databases and their quality, regulatory obligations, traffic expectations, which devices matter and any technology you are committed to. If a deadline is real, explain what drives it: an experienced team is usually able to rearrange the plan to hit it, provided they hear about it early.
Define what completion means for each item. Clear acceptance criteria do not need any formal notation: a short list setting out the expected behaviour will do. This one section compresses acceptance testing considerably and eliminates the most common source of disputes.
To close, ask for a specific format. Request a breakdown by feature or hire react programmer module, a written list of assumptions, the main risks and an optimistic and a pessimistic figure. Take a broad range as a signal about the brief: it tells you where your description is thin. From there tighten that section and ask for a new estimate — the revised figure will be much more reliable.