Fractional CTO for Startups & AI ProductsValentin Mercier
A senior technical partner for non-technical founders, from pre-seed to Series A. I own your product architecture and ship code myself, so you get a CTO who builds, not one who only advises.
What you get
Technical roadmap and architecture decisions
Hands-on development on Next.js, Supabase and TypeScript
AI features with Claude, OpenAI or Mistral (agents, RAG, automation)
Hiring help and code reviews when you grow a team
Tech due diligence prep for your fundraise
How it works. A monthly retainer, from 1 to 5 days a week. Async-first with daily written updates, overlapping US East Coast and EU hours.
Track record. 20+ products shipped, clients raised €7M+, founded and sold a startup (Tastyn, 2024), lead dev at a fintech handling €15M GMV/month.
Starting at $3,500/month. Book a 30-minute call to scope it.
Example work
Valentin's other services
Starting at$3,500 /mo
Tags
CTO
Frontend Engineer
Web Developer
Service provided by
Valentin Mercier Paris, France
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Fractional CTO for Startups & AI ProductsValentin Mercier
A senior technical partner for non-technical founders, from pre-seed to Series A. I own your product architecture and ship code myself, so you get a CTO who builds, not one who only advises.
What you get
Technical roadmap and architecture decisions
Hands-on development on Next.js, Supabase and TypeScript
AI features with Claude, OpenAI or Mistral (agents, RAG, automation)
Hiring help and code reviews when you grow a team
Tech due diligence prep for your fundraise
How it works. A monthly retainer, from 1 to 5 days a week. Async-first with daily written updates, overlapping US East Coast and EU hours.
Track record. 20+ products shipped, clients raised €7M+, founded and sold a startup (Tastyn, 2024), lead dev at a fintech handling €15M GMV/month.
Starting at $3,500/month. Book a 30-minute call to scope it.
Example work
Valentin's other services
$3,500 /mo