Raphaël Léger

- Health: Implemented optical character recognition for insurance cards using AI workers + set up automated mobile end-to-end tests (iOS & Android) for a pre-seed stage Health-sector startup. - Music: Fully designed and developed an app targeting dance teachers and students. Iterative development based on direct user feedback and passive via analytics. Creation of tempo analysis algorithms and integration of music providers API, all orchestrated with AWS. - Linguistic: Fully designed and developed linguistic web and mobile apps (French, Polish and Ukrainian). Implementing grammatical rules, setting up learning acquisition and reinforcement learning algorithms, gamification. FRONTEND: React, React Native, TanStack, pnpm, biome, Swift, SwiftUI, Android, Kotlin, iOS BACKEND: Node.js, Next.js, tRPC, Payload CMS, Pulumi, Expo, EAS, Amazon Web Services (Textract OCR, Lambda, S3), Google Cloud Platform (GCP Text-To-Speech AI and Speech-To-Text AI), Azure, Youtube Data API, Spotify API, AI, PostgreSQL, OpenAI MISC: Docker, N8N *new* FAVORITE AI COMPANIONS: Cursor / Claude / Gemini

- Designed and developed a new service enabling Apple as a flagship merchant to offer a complete split payment solution to its customers, both in Apple stores and online. FRONTEND: React, Vue.js, JavaScript, TypeScript, Cypress BACKEND: Python, FastAPI, SQLAlchemy, Docker, Docker Compose, Serverless, Terraform, Google Cloud Platform

- Over two years, I took part in building from scratch the technical infrastructure of the company, a majority of the services and products. Less than 10 people then, now counting 70+ people, a dozen of developers and +10 products used daily. - I designed, developed, tested and deployed web applications enabling brokers and underwriters to determine the prices of parametric insurances against poor climate and natural catastrophes: drought, wildfires, cyclones, frost, hail. - I also helped recruiting developers by leading technical interviews and ensured the newcomers follow good practices. FRONTEND: React, JavaScript, TypeScript BACKEND: Node.js, Nest (NestJS), Python, Django, Numpy, Pandas, GeoPandas, PostgreSQL, Postgis, Docker, Kubernetes, Azure DevOps, Serverless, Terraform, Terratest (Go), AWS: Lambda, Cognito, DynamoDB, API Gateway, Athena, Glue, SQS, AWS Batch, ECR, EC2, S3, Route 53, CloudFront, IAM, KMS.

- Set-up a digital platform designed to gather memories of the pandemic and actively serve research in order to emerge strengthened from this ordeal and prepare for future crises. FRONTEND: React, Next.js BACKEND: Next.js, Node, Express, Prisma, Jest, PostgreSQL, Docker-compose Misc: Vercel

- Led the development of front-end widgets to be displayed on a french high-traffic website. The widgets were built from scratch and display real-time soccer matches scores and statistics as well as team and players statistics. FRONTEND: React, hooks, JavaScript, Preact, Preact Habitat, Webpack.

- Accompanied individual students willing to become Developers over a one-year learning path. This role included sharing knowledge, setting appropriate weekly goals and following up.

- Led technical interviews to assess candidates developing skills, using a drill down approach.

- Designed and developed a fully functionnal component-based video player to replace the existing legacy video player. - Trained employees to use React efficiently, shared general development good practices and React-specific practices, performed audits on existing projects, set up long-term tools to ensure the applications are robust and easy to update. FRONTEND: React, Redux, JavaScript, Webpack, Video.js, npm.

- Designed and developed a platform enabling machine learning technology to be at the disposal of scientists to augment medical and biology research. - Evolved this platform from a proof-of-concept to a fully usable application by plugging in the first machine learning algorithms and by working on the user experience and the user interface. FRONTEND: React, Redux, JavaScript, Webpack BACKEND: Node.js, Express, Socket.io, Python, Django, Celery, Numpy, Pandas, Docker, Ansible, Jenkins, API REST, Google Cloud Platform GCP: Google Compute Engine

- Led the design and development of the public website, drastically improved the user acquisition and the conversion rate by working on the user experience (UX) and the user interface (UI). - Designed and developed the web application ensuring the efficient preparation of the ~500 products delivered each day from several kitchens in Paris by providing tools making this daily task convenient, fast and letting significantly less place to human errors. - Designed and developed web interfaces saving the internal teams hours of work-time every day - daily operations, sales, communication. FRONTEND: React, JavaScript, AngularJS, Grunt, Gulp, Webpack BACKEND: Node.js, Express, Amazon Web Services (AWS: ELB, IAM, ECS, EC2, S3, ROUTE53, CLOUDFRONT), Redis, PostgreSQL, Analytics, Segment, Zapier, Socket.io, API REST