Frequently asked questions

An experienced technical leader who joins your company 2 to 5 days a week, with no hiring process and no payroll overhead. They own architecture, stack decisions, development and recruiting, at a fraction of the cost of a full-time CTO.

Between €7,000 and €15,000 per month depending on involvement (2 to 5 days per week). The French fractional CTO market sits between €800 and €2,000 per day. Three-month commitment, no hiring risk, no payroll charges.

Below 8 to 10 developers, a full-time CTO is rarely 100% busy with actual technical leadership. A fractional CTO covers architecture, structural decisions and technical management, and you switch to a full-time hire when team size justifies it.

Remote by default, for clients in France and abroad: weekly video check-ins, written reporting, asynchronous code reviews. Based in Paris, I travel for key moments (kick-off, steering committees, hiring). For a long-term engagement, on-site presence in the Paris area is possible.

A full audit of what exists (code, infrastructure, team, processes), quick wins shipped within the first two weeks, then a technical roadmap aligned with your business goals, with reporting you can share with investors.

I code. That is the core of the offer: a hands-on CTO who ships the architecture AND the features, augmented by AI to produce the output of a team. Advice without execution is exactly what this format avoids.

I structure the team: code standards, code reviews, CI/CD, mentoring and hiring. At TF1, I am Tech Lead of a 4-developer squad within a multi-squad organization; that same playbook applies directly to your existing team.

3 months, renewable, to guarantee technical continuity, with a one-month notice period and no penalty. If the format no longer fits, you stop, with clean documentation and handover.

The first mobile engineer of a company: the person who picks the stack, designs the architecture, builds the first version of the app and sets the standards (tests, CI/CD, releases) every future hire will inherit. A founding role, too risky for a junior profile.

React Native in 90% of cases: one codebase for iOS and Android, time-to-market cut in half and a much larger hiring pool. I build native Kotlin/Swift modules when a feature requires it, as done at PMU and TF1.

A well-scoped mobile MVP costs €6,000 to €14,000 as a fixed-price project. For ongoing support (first mobile engineer), budget €7,000 to €15,000 per month depending on pace. The online calculator gives you an estimate in 2 minutes.

Expect 4 to 8 weeks from kick-off to the first public version: 2 to 4 weeks building the MVP, one week of polish and TestFlight, then Apple review (1 to 3 days). Developer accounts can be created on day one.

Remote by default, including at TF1 and PMU: asynchronous communication, weekly video demos, code visible continuously. A 3 to 4 hour time difference is not a problem. For a long-term engagement, on-site presence in the Paris area is possible.

Yes. Audit of the code, crashes and release pipeline, then consolidation: exactly the work done at Zeturf on a production betting app. A free 30-minute audit gives you an honest picture of your app's real state.

It is a fair question. The answer has three parts: the scope is written and frozen before the clock starts, the data is mocked so no time goes into plumbing, and I reuse building blocks I know inside out. The Art Fusion Sénégal site, CMS included, was built in under fourteen hours. The dates are in the Git history and I can walk you through them on a call.

Because my workflow is rehearsed. Scoping is scoped, the stack is decided in advance, the building blocks carry over from one project to the next, and the build is assisted by Claude Code and agents I wrote for my own needs. One day with that tooling produces what used to take a week without it. The price follows the real time, not what it would cost someone starting from scratch. It is also a way to meet over a deliverable rather than a quote.

Yes, and it is often the best starting point: the copy is written, the structure is known, the search ranking is earned. In 24 hours we can rework the design, restructure it for SEO or add the missing feature, all on staging. Your live site keeps running, untouched.

Going to production, wiring your real data, user accounts, payments, load handling, full GDPR compliance and app store releases. The deliverable is a private staging link, not a site open to the public. The full list is higher up this page, and it is repeated in black and white in the proposal.

Then we do not do 24 hours. During scoping we either find the journey that fits the format, or I offer you a longer engagement on the same fixed-price principle. You pay nothing until that is settled.

Yes, 100%. The GitHub repository is in your name from the first commit, along with the documentation and hosting access. No dependency on me: any developer can pick the project up the next day.

Remote by default, for clients in France and abroad; on site or hybrid is possible in the Paris area for long-term engagements. Based in Paris, I travel for key moments. The rituals: video kick-off, continuously visible progress, weekly demos.

A free 30-minute call: you describe the need, I tell you honestly whether I am the right profile and in which format (fixed price, long-term engagement, fractional). Written proposal within 48 hours, start possible the following week.

A fixed-price “MVP in 24 hours” project usually starts within 1 to 2 weeks. A fractional engagement (2 to 5 days per week) is set up within 2 to 4 weeks depending on current workload. The booking calendar shows real availability.

Fixed price announced before kick-off for scoped projects; monthly for fractional work. Standard French invoicing with VAT, 30% deposit on fixed-price projects, balance on delivery.