Freelancer profile translated to English.
Back to original languageAbout Julien
Hi, I'm Julien 👋
Former Android engineer turned cross-platform developer, I now assist startups and SMEs as a Freelance CTO —
not to code, but to structure, decide, and manage.
Specifically, I help you to:
🔍 Audit your existing stack (mobile, web, cloud) to identify
technical debt, risks, and areas for optimization.
🗺️ Frame your project before starting development: technical
specifications, technology choices, realistic cost and time estimates.
🧱 Choose the right architecture according to your stage (MVP,
scale, redesign) — Flutter, KMP, Firebase, Supabase, cloud
functions... I know the pitfalls from the inside.
🤝 Manage your service providers or technical team: recruitment,
code review, rituals, deliveries. I serve as the interface between your
business vision and technical reality.
💡 My advantage? I'm still an active developer. I don't theorize:
I know exactly what's possible, in how much time, and at what cost.
If your project needs a hand with development, I can also handle that part.
This profile is for founders, executives, and product managers who
need an expert technical perspective without hiring a full-time CTO.
French
Native or bilingual
English
Conversational
Remote only
Primarily works remotely
Experience
- FactureZen-XCEOJanuary 2026 - Today (7 months)I am building a simple solution that allows entrepreneurs to create their invoices and automatically convert them to Factur-X format, in compliance with the 2026 reform.
- ASO KraftCEOFebruary 2026 - Today (6 months)Generate your App Store and Google Play listings with AI, audit your score in real-time, and track every improvement over time.
- Freelance Fractional CTO @ MTP-RunningFractional CTOSPORTSNovember 2024 - Today (1 year and 9 months)FranceMTP Running revolutionizes personalized sports coaching. As Fractional CTO, I manage the technological vision of the application to ensure a seamless experience between coaches and athletes. My role: transform the ambition for performance into a robust, scalable, and user-centered tech architecture.
Recommendations
Be the first to recommend Julien
Help this freelancer shine by sharing your experience working together.
These freelancer profiles also match your criteria
Agatha Frydrych
Backend Java Software Engineer
4.7
(3)
2
Baptiste Duhen
Fullstack developer
4.6
(4)
5
Amed Hamou
Senior Lead Developer
4
(2)
7
Audrey Champion
Web developer
4.3
(3)
4
Education
- Discover object-oriented programming with Python. Learn to code with JavaScript. Manage your data locally to have a 100% offline application.Découvrez la programmation orientée objet avec Python Apprenez à coder avec JavaScript Gérez vos données localement pour avoir une application 100 % hors ligne
- Level 6 Diploma (Bachelor's/Master's degree)OpenClassrooms2022diplôme de niveau 6 (Bac+3/4)