Freelancer profile translated to English.
Back to original languageAbout David
Senior full-stack developer and architect with 20 years of experience, including several years as Associate CTO and founder of tech products.
I work on both from scratch projects and existing ones, with strong expertise in SaaS platforms, complex business tools, and the integration of AI in production.
🔹 Concrete Case — Affinicar
Associate CTO, I designed from scratch a claims management application integrating several AI models for file analysis.
→ Processing time reduced from 48h to 12h
→ Effective work time per file divided by 3
This type of mission — taking an existing business process and enhancing it with AI — is what I do best.
🔹 Applied AI Expertise
My expertise goes beyond chatbots:
→ Integration of LLMs (OpenAI, Gemini, Anthropic) into business workflows
→ Design of intelligent voice agents (OpenAI Realtime API, Vapi, SIP/Asterisk)
→ Automated document analysis
→ Associated infrastructure: GitLab CI/CD, Kubernetes deployment (EKS, MicroK8s), monitoring
🔹 Background
→Lead developer at Deezer
→ Several mobile applications in production (e.g., ChefclubTV)
→ E-commerce platforms and internal tools for Groupe Corso
→ Co-founder of Onekia (AI voice agents for real estate)
→ Several products launched as founder/CTO — product and business vision beyond code
🔹 Main Stack
Node.js / NestJS / TypeScript, React / Next.js, React Native, PostgreSQL, Docker, Kubernetes, LLM integration (OpenAI, Gemini, Anthropic)
English
Fluent
French
Native or bilingual
Remote only
Primarily works remotely
Experience
- AFFINICARAssociate CTOSOFTWARE PUBLISHINGJanuary 2024 - Today (2 years and 7 months)Aix-en-Provence, FranceAssociate CTO of a SaaS platform for mechanical breakdown warranties in the automotive sector. Design and development from scratch of the entire platform.Complete architecture: NestJS API, React frontend, AWS EKS infrastructure (Kubernetes), GitLab CI/CDIntegration of AI (Gemini 3 Pro) for automatic analysis of quotes and claims files → processing time reduced from 48h to 12h, work time per file divided by 3Stripe Connect payment system (Custom accounts, embedded components)Integration of YouSign electronic signatureMulti-tenant management, RBAC, complex business workflows
- OnekiaCo-founder CTOREAL ESTATEAugust 2025 - Today (1 year)Marseille, FranceCo-founder and CTO of an AI voice agent for real estate agencies.The product automatically answers incoming calls from tenants and candidates, qualifies requests, and schedules viewings.
- Complete architecture: NestJS, PostgreSQL, Scaleway Kubernetes
- Integration of OpenAI Realtime API for real-time voice conversation
- Integration of SIP/Asterisk for telephony
- Intelligent call qualification and routing system
- Exhibited at the RENT Paris 2025 trade show (real estate innovation fair)
- Groupe CorsoLead Developer / DevOpsE-COMMERCEJanuary 2024 - March 2026 (2 years and 2 months)Aix-en-Provence, FranceLead dev and DevOps for the group's e-commerce platforms (Maison du Menuisier,).Responsible for the entire cycle: development, deployment, infrastructure, CI/CD.From Scratch development of a custom carpentry marketplace with 3D rendering and configurator, integrated Mangopay then migrated to LemonWay.Setup of a MicroK8s cluster with Helm deployment, cert-manager, and Kubernetes dashboard.Complete CI/CD pipeline (GitLab Agent, Kaniko, semantic versioning, automatic deployment by tags)Next.js frontend and NestJS backend developmentTechnical documentation and developer onboarding
Reviews
Elie
Web Avenue
Reviewed on 9/15/2022
Very professional and efficient, I recommend David without hesitation!
AD
Account deleted
Reviewed on 5/6/2020
David was attentive and understood our needs well. He asks the right questions and helped us a lot in anticipating future problems by improving some of our processes. The application is of impeccable quality and doesn't seem to have any bugs. We would gladly rely on him for future features and improvements, as well as for support.
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Education
- Master MIAGEUniversité Paris Dauphine2009License de Mathématiques Suivi d'un Master MIAGE (méthodes informatiques appliquées à la gestion des entreprises)
Certifications
- Ultra-fast applications with Node.jsopenclassroom2020
- Optimize your deployment by creating containers with DockerOpenClassrooms2020