# Mikaël Wawrziczny

> Senior Software & AI Engineer — Lead AI Engineer @ AI Sisters Lab. Freelance software & AI engineer with nearly 10 years of experience (developer since 2017, starting in e-commerce), founder of the Joys Lab studio (SASU). Lead AI Engineer at AI Sisters Lab (AI POCs and MVPs for IT departments) and senior front-end developer on WeSave's Vue 3 migration. TypeScript fullstack: Vue/Nuxt, React/React Native, Node.js/NestJS, LLMs in production since 2024 (RAG, agents, structured outputs). Currently pursuing the Claude Certified Architect – Professional certification (Anthropic). Accessibility built in by default (WCAG, RGAA). Before code, 15 years on the business side of digital and e-commerce: product sense, teaching skills, comfort in large-account environments.

Freelance through Joys Lab (SASU), based in Normandy, France, prefers full remote, hybrid accepted with at least 3 remote days per week. Contact: mikaelw@gmail.com. The site is bilingual (French / English) and its homepage hosts an AI assistant that answers questions about this profile.

## Links

- [Portfolio](https://mikaelw.com/): case studies, journey, skills and AI assistant
- [CV (English, PDF)](https://mikaelw.com/CV_MW_EN.pdf)
- [CV (French, PDF)](https://mikaelw.com/CV_MW_FR.pdf)
- [LinkedIn](https://linkedin.com/in/mikael-w)
- [GitHub](https://github.com/Mikael-W)

## Certifications

- Claude Certified Architect – Professional — Anthropic (in progress, 2026)

## Experience

- **WeSave · Amundi group** — Senior front-end developer — Vue 3 migration (2026 → ongoing): Amundi subsidiary (Crédit Agricole group). Multi-brand financial advisory application; wesave-components design system, ECharts evaluation, mobile PWA dashboard.
- **AI Sisters Lab** — Lead AI Engineer (2026 → present): Recurring client, fixed-price projects: AI POCs and MVPs for IT departments and Innovation teams — scoping, agents and LLMs, through to production.
- **Accor** — Senior Fullstack Engineer — Technical Lead (2023 → 2025): Front-end technical lead on the booking funnel.
- **Joys Lab** — Founder & Lead Developer — fixed-price projects (2022 → present): Fixed-price projects: SaaS, web and mobile apps, AI — MCI, Gritchen, Place2Be, Forenlyst, OSS Nation.

## Case studies

- **WeSave (Amundi group) — Vue 3 migration & design system** — Problem: A multi-brand financial advisory application on Vue 2, built on a UI kit (vue-material) incompatible with Vue 3. Solution: Vuex → Pinia, Pinia Colada for server cache, components replaced by the wesave-components design system. Impact: Code agents connected to Storybook via MCP check the design system's real props; UI scope re-estimated from 30 to 14 days.
- **AI Sisters Lab — AI POCs and MVPs** — Problem: IT departments and innovation teams who want to validate AI on their own use cases without committing to a long project upfront. Solution: Scoping and technical feasibility, then fixed-price AI POCs and MVPs: agents, LLM integration, RAG. Impact: AI use cases proven on real work, with a clear path to production.
- **Accor — booking funnel** — Problem: Modernise the Vue 2 booking funnel of a site served in 17 languages and countries. Solution: Vue 3 / Nuxt 3 rebuild, dedicated Node.js BFF, GraphQL with caching and fragments, hybrid SSR/CSR. Impact: Vitest + Playwright tests automated in CI; front-end architecture lead for a team of 12.

## Projects

- [Koifr](https://apps.apple.com/fr/app/koifr/id6787132127): Koifr — what to do around you: iOS app recommending events, concerts, restaurants, hikes and outings from natural-language requests. Live on the App Store. (iOS, AI, Natural-language search, Geolocation)
- [trimly](https://www.npmjs.com/package/@trimly/core): Open-source tool (TypeScript/Node CLI) to track token consumption for Claude Code. @trimly/core & @trimly/cli published on npm under Apache-2.0. (TypeScript, Node.js, CLI, npm, Apache-2.0)
- [Forenlyst](https://forenlyst.com/fr): Deepfake detection and forensic certification SaaS: Next.js front-end, NestJS back-end with Python microservices and cryptographic signing. (Next.js, NestJS, Python, microservices, Crypto)
- My Liste Chaude: React Native / Expo mobile app (Firebase Auth/Firestore, geolocation, deep linking, CSV/Excel import, XP/levels gamification), full EAS pipeline. (React Native, Expo, Firebase, EAS)
- [Chasse en Cours](https://play.google.com/store/apps/details?id=com.mw.chasse_en_cours&hl=fr): Flutter safety mobile app for hunters and hikers, published on the Play Store. V2 in development. (Flutter, Dart, Firebase, Firestore)
- [OSS Nation](https://oss-nation.com/): International BJJ platform for seminars & open mats with geolocation, AI analysis, advanced filters and full i18n. (Nuxt 3, Firebase, Firestore, Node.js, OpenAI API)

## Skills

- frontend: Vue 3, Nuxt 3, React, Next.js, Angular (as needed), TypeScript, Tailwind CSS, GraphQL/Apollo, Pinia, Storybook, Design System
- backend: Node.js, NestJS, Fastify, Express, BFF, microservices, Laravel / PHP, REST API, GraphQL, MongoDB, SQL, Firebase / Firestore, Auth0, Bun
- mobile: React Native / Expo, Flutter / Dart, EAS
- devops & testing: Vitest, Playwright, Jest, TDD, GitLab CI/CD, Docker, Netlify, Vercel, EAS
- ai: OpenAI API, Anthropic API (Claude), Prompt engineering, RAG / embeddings, Python microservices, Vector search, Intelligent chatbots, OpenAI TTS / STT, Autonomous agents, Qwen, AWS Bedrock, Google Cloud Platform
- quality: Accessibility (a11y, WCAG/RGAA), i18n (vue-i18n), SSR/CSR, SEO