Freelancer profile translated to English.
Back to original languageAbout Ulrich Sêmassa
Web & AI Tech Lead, I industrialize AI in high-stakes contexts: finance, fintech, cybersecurity, regulated environments.
For 12 years, I have been supporting product and tech teams on backend architecture and LLM integration in production. My dual expertise in Web Tech Lead + Applied AI allows me to deliver solutions that pass real-world constraints of PCI-DSS, GDPR, and ISO 27001 audits.
WHAT I DELIVER CONCRETELY
- Production-ready RAG Architectures (LangChain + Anthropic Claude + GPT + Mistral) on internal security documentation
- Automation of banking security access requests (Symfony + PCI-DSS + Python/Flask microservices)
- PCI-DSS certified fintech platform PayPlug — scalable Symfony backend on Google Cloud + Kubernetes
- AI Agents + automation workflows (Claude + MCP + n8n) for product teams and second brain
- Mentoring 3+ developers and leading PI Planning ART for 60 people
STACK AND EXPERTISE
- **AI**: RAG, AI Agents, LangChain, Anthropic Claude, GPT-4, Mistral, MCP (Model Context Protocol), vector DBs (Pinecone, Chroma), prompt engineering, fine-tuning
- **Backend**: Node.js, TypeScript, Python, Symfony, NestJS, Next.js, PostgreSQL, microservices, REST API
- **Frontend**: ReactJs, NextJS, Shadcn, TailwindCSS
- **Cloud and DevOps**: Docker, Kubernetes (CKAD certified), Terraform (HashiCorp Associate), GitLab CI/CD, GCP, AWS
- **Security and Compliance**: PCI-DSS, regulated environments, OWASP, GDPR, ISO 27001
MASTERED CONTEXTS
- Finance (BNP Paribas)
- Fintech (PayPlug)
- Cybersecurity (Orange Cyberdefense)
- Tech scale-ups, regulated environments.
METHOD
- Scoping - POC - Industrialization.
- Agile (Safe Agile, PI Planning ART),
- Skills transfer included, systematic code review.
Ready to discuss your AI or backend project? I respond within 1h on weekdays.
French
Native or bilingual
English
Fluent
Remote only
Primarily works remotely
Experience
- Orange CyberdefenseTech LeadDIGITAL AND ITMay 2022 - May 2026 (4 years)Nanterre, France
- Technical lead on critical web applications in cybersecurity — Symfony / Node.js / Python stack, high-security contexts (GDPR, ISO 27001)
- Implementation of an iTOP CMDB, automation, and data migration
- Design and maintenance of secure REST APIs (API Platform) for exposing sensitive business data
- Microservices architecture and Docker / Kubernetes deployment — highly available multi-DB infrastructures (PostgreSQL, Redis, MongoDB)
- GitLab CI/CD pipeline + automated tests on projects subject to strict security standards
- Mentoring, code review, and skills transfer for 3+ developers
- BNP PARIBAS SALead Developer (Fullstack)BANKING AND INSURANCESeptember 2021 - July 2022 (11 months)Montreuil, France
- Design and technical lead of a security access request automation platform — transition from a manual process to an industrialized web solution (Web App + API + scripts) in a regulated banking environment
- Python microservices architecture (Flask) + Angular/TypeScript, Swagger-documented REST APIs, asynchronous processing via Celery
- Kubernetes / Docker deployment, high-availability PostgreSQL, Jenkins + GitLab CI/CD pipeline
- Guarantee of compliance with BNP Paribas security requirements (audits, traceability, access controls, GDPR)
- Agile Scrum management, Jira tracking, team rituals
- La Forge
On Malt
Fullstack Developer NodeJs/AngularDIGITAL AND ITApril 2022 - June 2022 (2 months)Short mission (2 months) in parallel, delivery on Node.js / Angular web project for an agency team- Redesign and evolution of an Angular application based on AdobeXD mockups delivered by the design team
- Maintenance and evolution of Node.js APIs: refactoring, optimization, new routes
- Independent work on defined scope, delivery within deadline
Reviews
Recommendations
These freelancer profiles also match your criteria
Agatha Frydrych
Backend Java Software Engineer
4.7
(3)
2
Baptiste Duhen
Fullstack developer
4.6
(4)
5
Amed Hamou
Senior Lead Developer
4
(2)
7
Audrey Champion
Web developer
4.3
(3)
4
Education
- BTSHECM2013Brevet de Technicien Supérieur en Informatique de Gestion
- Software Architecture LicenseESGIS2015Licence en Architecture des Logiciels
Certifications
- CKAD: Certified Kubernetes Application DeveloperThe Linux Foundation2020
- HashiCorp Certified: Terraform AssociateHashiCorp2021