Yesterday, building custom software cost €30,000 and took 6 months.

Today it takes 1 day and costs €1,200

The quality hasn't changed, only the methods.

Which means you can save money and time.

A custom tool is a huge competitive advantage, and it used to be reserved for the giants. I'm making it available to anyone with a project!

Youssef, founder of Growth with Flow

Hey, that's me

I'm a French software engineer. After my studies I left a consulting job at an investment bank and went freelance, with one mission: helping people who want to do things differently actually get their projects built.

Examples of what we can do

The kind of tools we can build together during a session.

Doable in three days

A tool that fills in a grant's documents

The right template, the values already filled, the file saved in the right place.

  • The funder's template, picked on its own
  • Values arrive from the team's own software
  • The file named and saved, no retyping
See the details
Doable in one day

Quote follow-ups that send themselves

A quote goes out, the follow-ups follow on the right day, by themselves.

  • Written once, they apply to every quote
  • The quote moves, the email goes out
  • You see who opened and who clicked
See the details
Doable in three days

One calendar for every venue

Several venues, dozens of rooms, thirty people: everyone looks at the same schedule.

  • Every room of every venue, at a glance
  • On hold or confirmed: each slot says so
  • The quote's details land on the slot
See the details
Doable in one day

An app to track your money

Budget, bank, invoices, tax: all in one place, kept up to date on its own.

  • The bank sends the expenses in
  • Every expense lands in the right budget line
  • Invoices sent, payments tracked, tax computed
See the details
Doable in three days

Know where every grant stands, every morning

25,000 lines of hours, about ten grants, the money already spent computed every morning.

  • Every hour logged attached to its grant
  • The amount computed: hours × hourly cost
  • The funder's report, in one click
See the details

Two kind messages from happy clients

Careful, I'm going to blush.

“Nobody had taken the time, or had the curiosity, to really understand what was blocking us.”

“I get so much praise for that website. It's so different, exactly like my school.”

A workshop is three things.

A way of working that didn't exist before, where we meet in person and build a custom application together.

In the morning

A real consulting session.

We look at how you work today, what takes time, what gets stuck. And we decide together what the tool should do.

In the afternoon

The development.

I build the application with Claude Code, tailored to the way you work. You sit next to me and watch the tool take shape.

After the workshop

The follow-up.

You are not left alone with the tool. Support when something gets stuck, maintenance, advice, and new features as the project grows.

The sessions

Together we build an application designed around your own processes.

Two ways to pay

Pay upfront

You pay for the session upfront. Then you choose: I keep the app online and maintain it, or you take it over if you have a technical team.

Pay monthly

You pay monthly for a year. Everything is included: the session, going live, the upkeep. After a year, same choice: I carry on, or you take it over.

Simple software

A one-day session

€1,200

One process, tooled end to end.

I keep the app online: €90 / month, optional.

Complex software

A three-day session

€3,000

Several processes that feed into each other.

I keep the app online: €150 / month, optional.

Coffee, lunch and access to The Social Hub included.

Five days on a retreat

We go away and take on the thing you keep putting off. Airbnb, all inclusive: we unplug, we cook, we get some air. And we genuinely move on what's been dragging for a year.

from €8,000

depending on the place

And afterwards?

Consulting session, 1h€300
Adding a feature€500

Tell us about your project, leave with a workshop plan

Describe what weighs on you day to day, in your own words. The assistant pins down the real problem with you, then shows you what you'd have by the evening, in one day or three. The next step is a call with Youssef.

0 / 1000 characters

Frequently asked questions

€1,200 for the one-day session, €3,000 for three days, from €8,000 for a five-day retreat. Everything is included: the framing, the development, going live. Every format can be spread over twelve months, and the first 5 then get 2 months free.

Yes, for one process. In the morning we frame your business, in the afternoon we build with Claude Code, by the evening the tool is online. What used to take a team six months now takes a day. The quality hasn't changed, only the methods.

You do. The same evening if you pay upfront, at the end of the year if you pay monthly.

You, on your own servers. Or me, for €90 / month with no commitment (€150 / month for the three-day format).

In Toulouse, at The Social Hub. Access is included, so are coffee and lunch. For the five-day retreat we go away to an Airbnb, all inclusive.

Consulting sessions at €300 per hour, and new features at €500 per feature.

No. In the morning we frame your business and your processes, and I advise you so we're sure we're building the right tool.

I use Claude Code, and the subscription is affordable for anyone. But delegating to an AI a task you have no skills in yourself is a bad idea: you won't be able to judge what it produces. That's where I come in.

Yes, it's the very demo of my workshop: a compliant e-invoicing app, designed and put online in one hour. Electronic invoicing becomes mandatory in France from September 2026, so you may as well own your tool rather than rent one more subscription.

Me, Youssef. I'm based in Toulouse, I design and build custom business tools for small and medium companies and for people starting out, and I'm your only point of contact, from framing to going live.

We should talk!

If you've made it this far, it might be worth carrying on with an actual call?

Grab a virtual coffee with me ☕