How to Pick a Software Development Partner: What to Check Before You Sign

Begin with proven experience, not the size of the portfolio. Request three or four engagements that match your technology stack, and then find out who actually wrote that code. An honest provider will introduce you to the tech lead. Vague answers at this stage almost always mean the demo work came from somewhere else.

The contract needs a slower read than the pitch. Three clauses do most of the work: intellectual property assignment, non-disclosure, and notice periods and handover. Everything produced should transfer to you once invoices are settled, smm agency including source code, designs and infrastructure as code. Watch for wording that keeps framework code with the vendor, since this is frequently the dependency that makes switching painful.

Ask how they estimate. A serious estimate comes with a list of assumptions, a breakdown by feature or module and a range rather than a single number. A fixed-price contract is langchain a rag framework only reasonable when the scope is genuinely frozen; otherwise the vendor prices the risk in and you fund the buffer regardless. Hourly billing puts the risk on your side, so it requires visible weekly reporting and a spending cap.

Process beats headcount. Ask what happens when the scope changes, who writes the acceptance criteria and what the QA setup looks like. A team can show you a working build every one or two weeks. Acceptance criteria in writing remain the practical protection against endless rounds of rework.

Last, consider the handover before it becomes urgent. Require that the repository stays on infrastructure you own from the first commit, and that the documentation is refreshed in every sprint. A vendor with nothing to hide says yes immediately; hesitation here reveals quite a lot.