Start with the problem you are solving, not a feature list. Who will use this, how many times a day, and what does the process look like without it? An estimator who grasps the purpose will suggest a simpler way to reach it; one who only sees a feature list can only price exactly what you asked for.

Define what is included as concrete flows: a walk through each important path. Every bit as useful, list what the first release deliberately excludes. An explicit exclusion list removes more friction later than the rest of the brief combined. Also mark which decisions are settled and which are still open — the difference changes the price, and hiding it helps no one.

Write down the hard constraints. This means existing systems the typescript software has to talk to, hire golang web developer the data you already hold and its condition, compliance requirements, traffic expectations, which devices matter and infrastructure that is already decided. If a deadline is real, explain what drives it: an experienced team will often cut the right scope to meet it, provided they hear about it early.

Write down what completion means for the important items. Acceptance criteria do not need any formal notation: a short list describing what a user should be able to do will do. This one section reduces the review at the end dramatically and removes most late-stage disagreement.

One last thing, state what you want in the response. Ask for an itemised estimate, a written list of assumptions, the main risks and a low number and a high number. Treat a wide range as a signal about the brief: outsource ecommerce development it normally identifies the part of the brief that needs work. From there tighten that section and ask again — the next version will be far closer to reality.