Freelancer profile translated to English.
Back to original languageAbout Sébastien
Over 20 years of experience: coder, tech lead, CTO, business owner, trainer, with a 3-year focus on AI.
I design and deploy real-world systems that respect your IT, regulatory, budget, and security constraints.
I have never stopped coding throughout my career, so I am capable of creating the projects I work on from scratch. As a business owner, I also have a deep understanding of issues related to product, marketing, acquisition, and business in general. This dual role allows me to discuss on equal footing with all parties involved in the creation of many types of projects to maximize their chances of success.
What I have delivered:
🏦 Intelligent conversational agent (public/banking sector) — RAG + tool calling, business guardrails, source grounding, fallback to a human advisor.
💬 Automation of customer review responses — 900 reviews/day processed with contextualized responses.
🧾 Invoice recognition and accounting extraction — OCR pipeline + structured extraction, deployed in a legacy IT system.
💳 Bank transaction categorization — ML model in production (Bridge/Bankin').
📸 OCR on bank card receipts.
📝 Automatic correction of code exercises.
Beyond code: I have managed teams of 3 to 25 engineers in startups and large corporations. As a member of the executive committee of several companies, I know how to talk to executives as well as technical teams. Direct experience with regulatory constraints (GDPR, ISO 27001) in banking, healthcare, and accounting.
In summary:
→ Lead / Head of AI on-site — Lead your AI team, structure, deliver.
→ AI Architecture & production deployment — Transform your POC into a scalable product.
→ AI Audit & scoping — Evaluate your initiatives, recommend a realistic roadmap.
→ CTO / AI Technical Direction — Lay the foundations and support scaling.
English
Fluent
French
Native or bilingual
Can work on-site
Paris (up to 10km), Rennes (up to 10km)
Experience
- Net ConsultFreelance Chief Technology OfficerJanuary 2017 - Today (9 years and 5 months)Île-de-France, FranceMissions carried out for Renault, Vinci, Orange, Deloitte, La Banque Postale, Louis Vuitton and startups such as Josiane, Klaro (ToutesMesAides), Ekimetrics, Ordoclic, ToutCeQueJeVeux, OkaMedia etc. I work on digital transformation projects / product creation:- management and strategy- product design support- development of mobile and web applications in Angular, React, NodeJS, Typescript, RxJs, Firebase, MongoDb, graphQL, Algolia, HTML5, CSS3, etc.- structuring, recruiting and managing technical teams- implementation of architectures: serverless, micro-services, CDN, high availability, real-time, security, etc.
- OpeneatChief Technology OfficerFebruary 2022 - March 2024 (2 years and 1 month)FranceManaged and recruited a team of 10 senior developers. Implemented and monitored product improvements and evolutions in conjunction with Support teams, Product Owners, and company founders. Participated in the Executive Committee. Implemented the entire company stack on AWS and Google Cloud: micro-services, Aurora and Dynamo databases, API gateway, authorizers under COGNITO with advanced security management and WAF, CDK, SKS, lambda steps, React and Angular front-ends, NodeJS back-end, React Native mobile application, Machine Learning, LLM, deployment and continuous integration, unit tests, integration tests. Implemented the SCRUM methodology with one-week sprints, organized SCRUM ceremonies and trained the team, set up a product backlog with task prioritization, product versioning, best practices on JIRA, etc. Organized the development team: platform engineering, peer coding, code review, coding best practices, writing tests, etc. Business and reporting tools: Datadog, Looker, Hubspot, SalesForce, Sigma, WebFlow, etc. R&D work related to machine learning and generative AI. Implemented POCs and partnerships with companies and startups with similar challenges to OPEN.
- White Rabbit FormationFounder / Chief Executive Officer / Chief Technology OfficerNovember 2018 - January 2021 (2 years and 2 months)Île-de-France, FranceWhite Rabbit offers training, certified by La Grande Ecole du Numérique, in Javascript: Node, Angular, and React. Highly specialized training with a high level of pedagogical rigor that guarantees students are job-ready by the end of the course. Guaranteed permanent employment upon diploma validation. 10 free spots every year, open to disadvantaged individuals.
Reviews
Vincent
OXYCAR
Reviewed on 9/11/2020
Very good mission! Sébastien met our expectations, despite a complicated project!
This will allow us to meet the deadline for our application delivery!
I recommend him!
Vincent
OXYCAR
Reviewed on 8/21/2020
Top!
Recommendations
AS
+3
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Education
- Digital Project Manager Web DeveloperEFREI2011