Freelancer profile translated to English.
Back to original languageAbout Clément
Looking for an operational CTO?
I take technical responsibility for your project, whether it's for a few weeks of audit, the delivery of an MVP, or long-term support.
What guides my every technical decision: **profitability for your business, time-to-market, and user experience**. I speak business and product as much as code, with a CEO as with a development team.
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What I do concretely
- CTO / Tech Lead:Technical vision, architecture, MVP development. My approach is hands-on: I design and I code.
- Audit & Scoping:I evaluate your stack, identify risks and quick wins, and deliver a prioritized roadmap with business impact/cost/timeframe.
- Legacy Modernization:Taking over unmanageable systems. Observability, CI/CD, version upgrades, documentation: I make your tech maintainable and scalable again.
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Augmented by AI
I use Claude Code daily. I deliver alone what required a team two years ago. An MVP in weeks, not months. If a Tech team is already in place, I onboard them: continuous improvement of practices, allowing everyone to perform at their best.
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My background
CTO of Santafoo:
- AWS -> OVH cloud migration (reduction from €55k -> €7k annually, performance x5),
- Observability across all systems,
- CI/CD automations,
- BI migration PowerBI -> Superset,
- Overall maintainability restored
Co-founder & CTO of Olympe:B2B platform built from scratch, 12,000+ corporate sports sessions organized
Tech Lead:Projects developed from A to Z and delivered to clients of various sizes (from SMEs to large corporations)
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For whom?
Founders, executives, or project leaders needing a CTO to launch, structure, or modernize their technology.
French
Native or bilingual
English
Fluent
Can work on-site
Marseille (up to 15km)
Experience
- SantafooCTOE-COMMERCEMarch 2025 - Today (1 year and 3 months)Marseille, FranceTechnical management of a food e-commerce startup (order taking mobile app, last-mile delivery, warehouse management).Challenge: internalize technical expertise, historically held by a Dutch IT service company (backend offshore to India) and an independent frontend developer. No Tech Lead or architect for several years, significant technical debt.Taking Over
- Complete mapping of data flows
- Systematic error monitoring (Sentry)
- Stack version upgrades
- Streamlining synchronizations between application components
- Exhaustive system documentation
Migrations and Optimizations- AWS cloud migration → OVH (self-hosted): costs divided by 8 (€55k/year → €7k/year), server capacity x5
- API Performance: response times divided by 80 (median 4s → 50ms)
- BI Migration: PowerBI Pro → Apache Superset (open source, self-hosted)
Structuring and Management- Recruitment and briefing of freelance contractors
- Technical roadmaps, planning, budgets
- Business specifications: SAP, warehouse (barcode scanners), purchasing (stock forecasting), marketing (Marketing Automation migration)
- SaaS partner negotiations: Stripe commission reduction, Algolia overcharge recovery
- Sale of a platform license to an international partner
AI-augmented workflow (Claude Code).Stack:React Native, Node.js, Saleor/Django, Next.js, SAP B1 (SAP HANA), PostgreSQL, Ansible, Kubernetes. Infra: AWS, then OVH (sovereign cloud), self-hosted. - Peaks MéditerannéeTechnical LeadDIGITAL AND ITSeptember 2024 - February 2025 (5 months)Aix-en-Provence, FranceTechnical Lead at an IT service company specializing in software solutions(~25 consultants in the Aix branch): architecture, data, project management, development for large corporations.
- Tender responses: architecture, technical, human, and budget sizing
- Technical recruitment: process, profile qualification, interviews
- Coordination and development of client projects and internal tools
- SPIE Global Services Energy (Thailand)
On Malt
Lead Full-Stack DeveloperENERGY AND UTILITIESJune 2024 - September 2024 (4 months)Bangkok, ThailandWeb platform for ingesting and processing data (CSV, Excel) for industrial system maintenance and inspection in the energy sector.Context of high volume and demanding performance and security requirements.- Architecture and technical specifications based on the functional requirements document
- Full-stack development React/Next.js, PostgreSQL, Pipeline Builder
- Processing large files (100+ MB, 100,000+ lines): browser preview without server transit (front-end Web Workers), bulk imports via backend subprocesses
- Dynamic RBAC permissions system: roles and authorizations configurable on the fly
- Search engine with streaming results
Stack:React, Next.js, Prisma, PostgreSQL, Material UI, DataGrid, Docker, Nginx.
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Education
- General Engineer - Software and Networks SystemsIMT Atlantique2008
- Lean Six Sigma - Green BeltCentrale Paris2015