You explain it once
You describe your business to the person who will write the code. There is no meeting report to review, no specification document to sign off, no brief translated three times before it reaches a developer.
About
A direct line between the need and the system that gets built.
Nathan Goutagny, founder of NateSystem, takes your call, scopes the work, delivers it and trains your team.
So there is no intermediary between the original request, the technical choices and what actually ships: and no lock-in either: the code, the accounts and the data are in your name, on a standard stack another developer can pick up.
You explain it once. And you depend on no one to keep going.
In a conventional project, your problem is heard by a consultant, written up, passed on, translated into specifications, then coded by someone who has never spoken to you. Every handover costs precision.
Here there are none. That is the main advantage of working this way: and its counterweight is stated openly: the code, the accounts and the data stay with you, your team is trained until it is autonomous, and documentation is a deliverable rather than a favour.
What it changes in practice
Six verifiable consequences.
Built around what you already run
The system is built around your existing tools, not next to them. Your CRM stays the source of truth; what gets added are the links, the actions and the views that were missing.
Documentation as a deliverable
A user guide and an administrator guide are handed over at go-live. These are not end-of-project appendices: they are the documents that let you carry on without us.
Training to autonomy
At least two people are trained to run the loop on their own. Until that is true, the engagement is not finished.
Knowledge transfer
The point of an engagement is not to make you dependent. Build & Run exists for teams who would rather delegate day-to-day running: not because there is no alternative.
You own the accounts and the data
Subscriptions are opened in your name and paid by you. The source code is yours. You depend neither on a closed platform nor on a supplier to reach your own data.
Why this offer exists
I am Nathan Goutagny, founder of NateSystem. I have spent the last few years building custom business software for SMEs: built on their real processes, not on a vendor’s. Every engagement ended on the same observation: they did not have a tool problem, they already had too many tools. They had a usage problem.
The clearest case was a consultancy. Its audit method was worth more than any software I could have sold it, but it lived only in its founder’s head and spreadsheets. Three quarters of his time went into re-entering and reformatting. Making the method self-sufficient did not give him a tool: it gave him his profession back.
Then an audit inside an engineering consultancy: terabytes of studies and project files accumulated over the years, everything archived, almost nothing reused. At a time when anyone can produce fast, that stock is the one advantage a competitor cannot copy. It was lying dormant. This offer comes from there.
A previous engagementThe case on its own page, with the five checks
Their audit method was their asset. It became their production tool.
This firm does not sell hours: it sells a way of assessing an operation, with its own grids, its benchmark thresholds and its way of scoring. That method already existed, in full. It simply could not be used by anyone other than the person who wrote it.
An operational performance consultancy. It audits its clients on site and hands them a costed action plan.
This case comes from a custom business software engagement that predates the offer sold on this site. It demonstrates no acquisition result and is not presented as one.
Client not namedThis case is published without the client’s name: we have not yet asked for their consent. They will be named once they give it, not before. Everything described below can be verified in the delivered system.
What was built
- 14 analysis domains
- 283 indicators, each with its formula, its benchmark threshold and its weight in the final score.
- 14 field audit modules
- 707 check points recorded on site, tied back to the indicators they explain.
- A deterministic calculation engine
- Scores come out of a formula, never a model. Two identical audits give the same result.
- Reports written from the results
- The AI formats and prioritises what has already been calculated. It scores nothing and decides nothing.
- Four engagement formats
- From a short diagnostic to a full audit, each with its own scope of indicators and modules.
- An account for every end client
- Their clients read their own reports and action plan, walled off from one another.
The system does not belong to me.
The code repository, the database and the hosting moved onto their own accounts, under a perpetual licence. NateSystem keeps a maintenance access, revocable by them. This is not a contract clause we are showing you: it is a transfer that took place, and this site could not claim it if the client could not confirm it.
What the client reported
- Around ten hours a week freed up on producing their reports.
- A win rate on proposals that went from 4% to 12%.
Both figures come from the client and concern their own business. They were not measured by NateSystem, and they relate to the custom software engagement described here, not to the acquisition offer sold on this site. Everything else in this case can be verified in the delivered system.
What this case demonstrates
- That a method held by one person can become a system others can use, without being watered down.
- That a scope of this size really does get delivered, documented and handed over.
- That AI can write without ever deciding, as long as the calculation stays deterministic.
What it does not demonstrate
- No commercial result was measured by NateSystem. The two figures above are reported by the client, on their own business, and relate to a custom software engagement.
- This is not an engineering firm or a design office. The mechanism is the same, the sector is not.
- The Diagnostic did not yet exist in its current form when this engagement started. The path described on this site is therefore not the one that was followed.
Proof, without staging
What exists. What is designed. What is illustrative.
This offer has not yet been delivered to a client. So there is no case study, no reply rate and no meeting count to show you, and we are not going to fabricate any. Here is what you can verify before committing to anything, not after.
What exists
Built, delivered, measured
- A custom CRM that replaced an entire software stack.
- Internal HR, inventory and operations tools, built on scattered data.
- The transfer of code, data and accounts to the client.
- The method, operated by hand with the assistance of AI and existing software.
- The client workspace where the Diagnostic will be delivered.
- The Norevia demonstrator, navigable, on fictional data, flagged as such.
- A previous AI software engagement: around ten hours a week freed up and a conversion rate that went from 4% to 12%, as reported by the client, the former custom software offer, not the offer sold on this site.
What is designed
Planned in the offer, not yet delivered
- The Diagnostic, in seven to fourteen working days.
- Build & Transfer: the infrastructure connected to your sources.
- Build & Run: running that infrastructure after acceptance.
- The automation of the steps the Diagnostic retains.
- The approval workspace.
What is illustrative
Public example, clearly labelled
- The account file published on this site.
- The interface captures on this site.
- The weekly volumes, a target cadence, not a measurement.
The first Diagnostics will produce the first measured proof, and it will be published as it comes out, including if it disappoints.
Compliance
How we prospect.
We only use professional data that is relevant to the person’s role. The source and the reason for the contact are documented. The sender is clearly identified. Unsubscribing is simple, immediate and permanent: the contact goes onto a suppression list. Campaign data is minimised, access-restricted, and hosted in the European Union whenever possible. You remain the owner of your data and your accounts.
This describes a practice, not legal advice: processing responsibilities are defined engagement by engagement.
Elsewhere
natesystem.com covers the full activity: custom business software, every sector. This site is dedicated to firms that sell expertise: consultancies, engineering firms, design offices, technical agencies and project-based B2B services.
A question before going further?
Nathan answers, and Nathan is the one who will build it if we work together.
or email directly at nathan@natesystem.com- Free, with nothing to prepare
- You leave with a read on your situation, even if it goes no further
- If the timing is wrong, we say so