Look first at domain experience, cost comparison nearshore vs offshore development not the number of logos on the website. Ask to see three or four engagements that resemble your domain and your stack, and then find out which engineers actually built it. A solid partner is happy to connect you with the people who would work on your project. Answers that name nobody at this stage almost always mean the delivery team is not the team you were shown.

The paperwork deserves more scrutiny than the proposal. Three sections matter more than the rest: ownership of the code, hire senior nodejs expert confidentiality, and notice periods and handover. Every artifact should transfer to you as it is paid for, along with documentation, pipelines and deployment scripts. Watch for any clause that keeps so-called reusable libraries in the vendor’s hands, because that is often the part you cannot replace later.

Find out how the estimate was built. A credible estimate comes with a written set of assumptions, a breakdown per feature and aws consulting services a range rather than a single number. A fixed price is only reasonable when the scope is genuinely frozen; otherwise the provider pads the number and you pay for uncertainty either way. Time and materials moves the risk back to the client, so it demands visible weekly reporting and a spending cap.

How the work is run beats team size. Establish how a new requirement enters the plan, who defines done and how quality assurance works. A team should be able to show you a live build at the end of each sprint. Acceptance criteria in writing stay the practical protection against endless rounds of rework.

Before signing, consider the end of the engagement before it outsourcing london becomes urgent. Require that the code repository sits in your organisation from day one, and that documentation is written as you go rather than left to the end. A partner who is comfortable with this accepts it without argument; resistance at this point tells you quite a lot.