Freelancer profile translated to English.

Description

AI Full-Stack Engineer and Tech Lead with over 15 years of experience in designing web, mobile, and SaaS applications. Specializing in modern architectures, multi-agent AI systems, RAG, hybrid embeddings, and controlled generation pipelines. Founder of JobMatch and Astraia. Experienced in mentoring teams, leading complex migrations, and delivering robust, scalable products.

Industry field of expertise

Languages

English
Fluent
French
Native or bilingual

Workplace preferences

Can work on-site

Metz (up to 50km), Paris (up to 10km)

Catalysia
AI Full-Stack Engineer & Founder
January 2025 - Today (1 year and 7 months)
Metz, France
Design of a multi-agent AI system with contextual orchestration.
- Advanced RAG pipeline: Python, hybrid embeddings, weighted scoring, vector DB.
- Full-stack development: Angular, Node.js, SQL, vector store, secure APIs.
- LLM provider switching (OpenAI, Ollama).
- Interpretation engine (astrology, dreams, numerology).
- Deployment, monitoring, structured logs, analytics.
- Conversational UX, user flows, rapid iterations
Angular Artificial Intelligence Node.js Python LLM
Autoentreprise
Full-Stack Web and Mobile Developer
December 2017 - Today (8 years and 8 months)
Metz, France
- Web/mobile apps: social networks, sports, real estate, e-commerce.
- Complete architectures: Angular, Flutter, Ionic, Node.js, Firebase, MySQL.
- Custom Capacitor plugins.
- Published apps: Dyspo!, Kompot, WePadel, Say Love, Whatboo
MySQL Firebase Cloud Messaging Angular Node.js Spring boot
Contentsquare
Team Leader Developer
June 2022 - January 2024 (1 year and 7 months)
Paris, France
- Mobile SDK development (iOS/Android).
- Mentoring 2 developers.
- Demo apps Ionic/React & Ionic/Angular.
- SDK published on NPM.
Ionic Angular Capacitor SDK Mobile application

Check out Romain's experience

Nicolas

Kompot

Reviewed on 2/11/2022

We hired Romain for the development of a cross-platform e-commerce mobile application. We are very satisfied with his service and recommend him without hesitation. He is serious, organized, and competent! Finally, he was proactive and used his experience to help us overcome the difficulties encountered.

Eric

OFSAD

Reviewed on 4/19/2021

Excellent first experience with Romain and our first trial of the Malt platform. Very good integration of our needs despite a very (too) basic specification from us regarding an old mobile application to be completely updated in terms of interface and technology. Technology chosen: IONIC 5.

Romain has chosen to hide 1 review

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Etienne De Kermoysan and 4 other people have recommended Romain

Agatha Frydrych

Backend Java Software Engineer

4.7

(3)

Baptiste Duhen

Fullstack developer

4.6

(4)

Amed Hamou

Senior Lead Developer

(2)

Audrey Champion

Web developer

4.3

(3)

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DESS Computer Science
Université Henri Poincaré de Nancy
2000

Romain Vincent

Fullstack / AI Engineer

About Romain

Experience

Reviews

4.8

Quality

4.7

Deadline

4.6

Communication

4.7

Nicolas

Eric

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