Telmi & Helloïz AI Chatbot
First generative AI chatbot in a major European bank. Built end-to-end with Svelte + Node.js, powered by Mistral AI and Rasa NLU. Presented at VivaTech 2025.
- 66% → 35% Escalation rate
- +3 M Users
- VivaTech 2025 Showcase
Full-stack engineer in FinTech, EdTech, SaaS, AI products and Web.



First generative AI chatbot in a major European bank. Built end-to-end with Svelte + Node.js, powered by Mistral AI and Rasa NLU. Presented at VivaTech 2025.
Real-time live course platform with student-teacher matching, back-office management and API infrastructure. Scaled to thousands of daily active users.
Augmented reality duty-free kiosk and mobile back-office for Giorgio Armani. Multi-market deployment with full i18n support.
Project enabling on-demand student-teacher matching in under 24 hours. Designed the full data model, endpoints and notification system from scratch.
Mobile sales management application for duty-free staff. Multi-language, multi-market deployment on Electron with AWS-backed sync.
Front-end components for a SaaS occupational health platform used by company physicians. Focus on reliability, accessibility and full test coverage.
Back-office for managing teacher teams and class schedules at scale. Handles 100+ classes per week with complex assignment logic and a rich admin UI.
Custom web application for one of the world's most visited museums. Led front-end architecture and delivery under tight deadline as technical referent.
SaaS web platform and Outlook plugin for enterprise meeting optimisation. Built the full product from zero — front-end, back-end and plugin integration.
Peer-to-peer engineering school — project-based, no teachers, no lectures.
Core skills
Full-stack video streaming platform — torrent-based ingestion, real-time transcoding, OAuth2, subtitles and multi-source search.
Real-time dating app with geolocation matching, live notifications, instant chat and profile management.
Instagram-like web app with real-time filters and photo compositing — built in vanilla PHP without any framework.
Web security audit — identify and exploit vulnerabilities (SQL injection, XSS, CSRF, path traversal, brute force) on a target web app.
Ray-casting first-person 3D engine inspired by Wolfenstein 3D, built from scratch with MiniLibX.
3D wireframe terrain renderer using isometric projection, with zoom, translation and rotation controls.
8 years building fullstack products in TypeScript, across EdTech, FinTech, retail and health. I like being close to product decisions, not just the implementation.
Currently at BNP Paribas, working on the first generative AI chatbot deployed in a major European bank. Showcased at VivaTech 2025.
A reward for scrolling all the way down.
Cat · Senior Staff EngineerSleep & Supervision. Doesn't do standups — not agile either, in any sense of the word.