Notes from a working CTO.
Costs, audits, due diligence, nearshore and MVPs, written for founders who have to make the call.
Factur-X and the 2026 French e-invoicing mandate: what a founder needs to know technically
Factur-X and France's 2026 e-invoicing mandate for founders: deadlines, Plateformes Agréées, formats, profiles, statuses and a SaaS invoicing checklist.
Read the articleFractional CTO vs freelance CTO vs agency: which one for a pre-seed startup?
Fractional CTO, freelance CTO or agency at pre-seed? An agency for a fixed build, a freelance CTO for full-time coding, a fractional CTO for decisions.
Read the articleHow I ship an MVP in 4 weeks with an AI-assisted workflow (and what still needs a senior)
An MVP in 4 weeks with AI works when a senior owns scope, data model, auth and security. My week-by-week plan, and where AI coding agents really help.
Read the articleHow to audit a codebase in two weeks: my exact process
A codebase audit in two weeks: ten working days covering history, architecture, security, GDPR, infra, tests and team, ending in a ranked risk register.
Read the articleNearshore to Tunisia vs offshore: time zone, GDPR, cost, language, honestly compared
Nearshore development in Tunisia vs offshore: Tunis keeps Paris office hours and speaks French, but costs more than Asia and GDPR transfers need SCCs.
Read the articleTechnical due diligence: the 25 things investors check before a seed round
Technical due diligence before a seed round covers 25 points: architecture, security, GDPR, infra, tests and IP. What reviewers check, what to fix first.
Read the articleWhat does a fractional CTO cost in 2026? (France / Europe benchmarks)
A fractional CTO in France typically costs €3,000 to €10,000 a month for 1-2 days a week. See how that compares with a salaried CTO, agency or freelance.
Read the articleYour Firebase / no-code MVP is about to cost you €40k. Here's how to tell.
A Firebase or no-code MVP gets expensive when it hits its ceiling and you rewrite late, under pressure. Ten scored signals, the €40k maths, a cheaper fix.
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