Background
About
Christophe Cosnefroy, founder of Yelty: thirty years of information systems architecture, from developer to CTO, now dedicated to enterprise AI.
I am Christophe Cosnefroy. For more than thirty years I have been designing information systems: I started as a developer in 1993 and held my last salaried position as CTO of a SaaS software vendor, sitting on its executive committee.
In between, I have been a developer, architect, consultant, head of architecture teams, DevOps and cloud specialist. This path taught me one thing: a system only has value once it runs in production, reliably, securely and under control. That is exactly what most AI projects lack today.
Why Yelty
Companies have multiplied generative AI experiments. Few have managed to take them into production. The problem is rarely the model: it is integration with existing systems, security, costs, operations, compliance. In other words, architecture.
I founded Yelty to put that experience at the service of this transition, with three simple services: taking a POC to production, providing shared-time technology and AI leadership, and preparing systems for the AI Act.
Career
- 2020 – 2026 · iObeya, SaaS software vendor — Head of Architecture then CTO, member of the executive committee. Technology and AI strategy, design and development of generative AI features (chatbots, RAG, agents, on-premise LLMs).
- 2018 – 2020 · Independent consulting and Wynd — API management expert for Louis Vuitton, cloud and DevOps architect for Veolia Water Technologies, then Head of Architecture at Wynd (microservices, Kafka).
- 2017 – 2018 · Palo-IT — Head of Architecture; design of a monitoring platform for BNP Paribas.
- 2011 – 2017 · Neoxia — senior architecture consultant: audits and architecture for Valeo, Arkadin, AFPA, ESSEC, CFDT and several public bodies.
- 2009 – 2011 · PMU — enterprise architect for the online business.
- 2002 – 2009 · SwissLife — architect, then head of the Architecture and Integration department.
- 1993 – 2002 — developer, then software engineer.
Certifications and education
- Google Cloud Professional Cloud Architect and Associate Cloud Engineer (2019)
- TOGAF 9.1 Certified (2016)
- Udacity Deep Learning Nanodegree Foundation (2017)
- University diploma in software and network project management, Polytech Nantes (1998)
What guides my work
- Clarity — saying what will work and what will not, even when it is not what people hope to hear.
- Trust — documented, justified decisions, and teams that become autonomous.
- Impact — one system in production is worth more than ten demos.
Based in the Loire Valley
I work from Montrichard, in the Loire Valley, remotely and on site, across France and Europe. In English and in French.