Developer Profile
Vivien Tassing — System Information
Vivien Tassing
ACTIVEFounder & Full-Stack Engineer
Full-stack engineer building complete products: mobile apps, real-time APIs, admin consoles and edge infrastructure. Founder of Maureen, a WhatsApp marketing automation platform on the Cloudflare edge, and full-stack developer on WaitNous, a ridesharing product for the Canadian market. Author of six-plus production APIs on Feathers, Hono and Cloudflare Workers. Signature stack: TypeScript, React Native, Refine, PostgreSQL and Cloudflare D1.
Development Philosophy
Schema-First Design
APIs are contracts. TypeBox schemas are designed first and shared across API, mobile and console clients, so every product evolves from a single source of truth.
Ship on the Edge
Cloudflare Workers, D1 and Queues deliver production-grade performance at minimal cost. When the workload fits the edge, I deploy there.
Products, Not Demos
I build complete suites — app, API, back office, website — designed to run in production for years, like Factory Management since 2023.
Experience Timeline
Founder & Full-Stack Engineer
Maureen (Cloudflare)
WhatsApp marketing automation platform on the Cloudflare edge — Hono, D1/Drizzle, R2, Queues, Workers AI. Evolved from Karl, a personal project started in 2023.
Full-Stack Developer
WaitNous (Canada)
Building the WaitNous ridesharing product for the Canadian market: React Native/Expo app, Feathers real-time API, Refine back office and bilingual compliance website.
Full-Stack Architect & Developer
Factory Management · Breeding Management
Two enterprise suites carried by the same long-term trusted client: an industrial management platform in production since 2023 (Feathers 5 API, React Native floor app, Refine + Mantine back office, S3 storage and scheduled background jobs) and, since 2025, a livestock breeding suite (Koa, TypeBox, PostgreSQL, Node 22) with its Refine console and React Native mobile app.
Backend & Product Developer
Oubuntu · Karl · Treethy
The Oubuntu commerce platform (Feathers API, Refine console, payments and OTP) plus personal projects: Karl, which later became Maureen, and Treethy — currently paused, planned to resume soon.
Software Developer
Pointo · Génie 4.0 · WeFly
Web platforms, a Java school management system and early full-stack work — progressively specializing in typed API stacks and mobile development.