Node.js Agency

The budget depends on the scope: number of functions exposed, connections to existing systems, volume of exchanges to handle and level of security required. A simple mobile API, connected to a single database, costs markedly less than a back end synchronising five business tools with different data formats. Every Node.js project is priced on quotation, once your integrations have been listed precisely, before a single line of code is written for your project.

A standard API takes 21 to 60 days between technical scoping and production release; a project with many integrations to existing systems calls for closer to 60 days. That time covers development, load and security testing, as well as a progressive deployment rather than a risky single switchover. When the back end has to feed a mobile application and a website in parallel, we coordinate the schedules of the teams involved so that a delay on one front does not block the other.

Node.js suits the vast majority of the web and mobile projects we run, especially when your interfaces are already in React or Next.js: the same language flows from front to back, which simplifies development and maintenance. Another language becomes preferable for work that is very intensive in pure computation, which remains rare in the API or business-tool synchronisation projects we support. We assess this point from the scoping stage, according to the actual nature of the processing your project expects.

Yes, we regularly take over APIs developed by another team. The initial audit covers the code, the dependencies used, their maintenance status and the security of the access already in place, often the most fragile point on an API taken over from a previous provider. This step separates what can be kept from what has to be reworked before adding new functions. We then hand you an action plan ranked by priority, so you know where every euro invested goes before committing.

An optional annual maintenance package can be put in place after production release, priced according to the actual scope of your API: dependency updates, availability monitoring, fixes and small developments. A back end that feeds several applications at once deserves regular follow-up, because an outage there often affects all your tools at the same time rather than just one. This package is never compulsory: the code remains entirely your property from production release onwards, whatever you choose afterwards.

Yes. Code repository, server and hosting access, technical documentation: everything belongs to you from delivery onwards, with no dependency clause towards our agency. For an infrastructure feeding several applications at once, this independence matters particularly, since it lets you develop or audit your back end with any technical team afterwards, without depending on us in the long run nor on a single developer who alone would know how the system works.

A back end is never read directly by search engines, but it conditions the speed of the site that rests on it: a well-built API reduces the response times of a Next.js or React site, a criterion Google takes into account in its ranking. It also makes it possible to keep the content displayed up to date automatically, with no manual re-entry, which limits outdated pages and expired product sheets. Search visibility remains carried by the front end, but a reliable back end is one of its conditions, not a secondary detail.