Billy Girboux
18+ years of experience driving technical vision and execution: software architecture, AI/LLM, and end-to-end SaaS product delivery.
About
CTO and Tech Lead with over 18 years of experience, I drive both technical vision and execution: software architecture, engineering team leadership, and end-to-end SaaS product delivery. Used to thriving in startup environments, I'm comfortable at every layer of the stack, from backend to production deployment.
Proven expertise in AI and LLM application development, language model integration, and GPU inference. Beyond the technical, I've developed a strong product sense: the ability to step back from what's being built, identify what's slowing things down or missing, and keep the long-term vision on track.
Skills
AI & LLM
Backend
Frontend & Mobile
Infra & DevOps
Data & Architecture
Languages & Misc
Personal Projects
Munr
Founder & Solo Developer
2025 -present
Infrastructure observability SaaS platform hosted in France. Logs, metrics, alerts, and errors centralized in a single tool. A sovereign alternative to Datadog, not subject to the CLOUD Act.
Hello Wellington
Founder & Solo Developer
2025 -present
Advanced conversational AI application. LLM fine-tuning (qLora), dedicated GPU infrastructure, full-stack and Flutter mobile development, complete DevOps and production inference management.
Maison Nourson
Solo Developer & Game Designer
2023 -present
Independent video game development studio. Design and development of two 2D games in Java, from engine architecture to store publishing.
Experience
CTO
Teelt.io
2022 · 2026
Remote
Full technical leadership. Platform design, infrastructure management, technical oversight and architecture. Integration of AI solutions into the product.
Lead Developer & Co-founder
Fragmnt.io / Soyoutrip
2018 · 2022
Sophia Antipolis
Built Soyoutrip: a travel planning application with geographical itinerary optimization. Full architecture, full-stack development, production deployment.
Freelance Trainer
Engineering Schools & Companies
2014 · present
France
Java and Mobile training at engineering schools and within companies.
Tech Lead / Software Architect
Option Way
2014 · 2018
Sophia Antipolis
Built the web application from scratch. Full stack: Java/Spring backend, Ember.js frontend, batch jobs. Developed an intelligent virtual travel agent. Technical lead for 4 years.
Integration Engineer
Login People
2013
Sophia Antipolis
Development of a strong authentication solution (digital DNA® technology). Intranet and extranet tools.
Android Mobile Engineer
AndroMC Systems
2012
Nice
Android app paired with a USB accessory: smart breathalyzer with integrated ride-home services.
Software Engineer
Humanis / Aprionis
2008 · 2012
Blois / Malakoff
Application development: pricing tools, extranets, contract management software.
Contact
Available for CTO, Tech Lead, or Architecture engagements. Feel free to reach out.