Freelancer profile translated to English.
Back to original languageAbout Hassan
Expert Full-Stack Developer specializing in the design and implementation of robust and scalable web and mobile applications. Demonstrated mastery of technologies such as Node.js, React.js, Fastify, Electron.js, GraphQL, CI/CD, Docker, and AWS. Passionate about creating high-performing and intuitive applications that meet user needs.
English
Fluent
French
Native or bilingual
Can work on-site
Paris (up to 50km), Paris (up to 40km)
Experience
- KhomeFullstack DeveloperBANKING AND INSURANCENovember 2025 - Today (7 months)Hôtel de Ville, Paris, France• Development of a fullstack web application in React.js (TypeScript) and Node.js / NestJS.• Design of REST APIs with NestJS, modular and scalable architecture.• Implementation of an MCP Server (Model Context Protocol) for secure service exposure and AI tool orchestration.• Implementation of a secure authentication system (JWT / OAuth2 / RBAC).• Frontend integration with React (hooks, state management, modular architecture, design system).• Design and optimization of database schemas (PostgreSQL).• Implementation of containerization with Docker (multi-stage builds).• Deployment and infrastructure management on AWS (EC2 / ECS / S3 / RDS / CloudFront).• Management of environments (dev, staging, production) and configuration of variables/secrets.• Creation of IAC for deployment on new AWS environments via CDK.• Implementation of CI/CD pipelines (GitHub Actions).• Monitoring and observability (structured logs, metrics, alerting).• Writing technical documentation and participating in code reviews.• Optimization of frontend performance (lazy loading, memoization, code splitting).• Implementation of unit and integration tests with Vitest, E2E via playwright.
- SCORDeveloperBANKING AND INSURANCEApril 2024 - October 2025 (1 year and 6 months)Paris, France• Development of a web app in React.js, integrating Zustand and Tailwindcss.• Development and maintenance of the web app (React, TypeScript, GraphQL, Apollo Client, Storybook).• Use of Figma mockups for front-end integrations, alignment with the existing design system.• Creation and exposure of APIs and microservices (NestJS, Node.js) in GraphQL/REST.• Implementation of Strapi as a headless CMS / data catalog.• Typing and generation of GraphQL clients (GraphQL Code Generator).• Authentication via SharePoint (enterprise SSO, group and permission management).• Docker containerization (multi-stage images, Azure Container Registry).• Deployments on Microsoft Azure (AKS / App Service), secrets in Key Vault.• CI/CD: Jenkins and GitLab CI pipelines (lint, tests, build, image, deployment).• Code quality: Jest, React Testing Library, ESLint, Prettier, Husky hooks + lint-staged.• Observability: Application Insights / Azure Monitor (logs, metrics, traces).• Technical documentation (ADR) and Storybook as living documentation of components.• Collaboration: pair programming, code reviews, PO/data team interactions.• Design and implementation of a backend using Nest.js.• Implementation of unit tests with Jest.
- Allisone.aiLead DeveloperHEALTH AND WELLNESSJanuary 2022 - April 2024 (2 years and 3 months)Paris, France• Design and POCs of several ideas before implementation.• Development and maintenance of a RESTful API for partners with Node.js and Fastify.• Development and maintenance of the web application with a React.js frontend, Graphql, Redux, Websockets.• Creation of various backend microservices on Express, Fastify, Hasura, and Nest.js.• Implementation of an OAuth authentication system via Keycloak.• Writing tests with Jest.• Design and development of a desktop application for users with Electron.js and React.js.• Feature development, bug fixes, and technical debt management.• Participation in the design and selection of technical solutions for various features.• Mentoring developers.• Implementation of coding standards, code reviews, and unit test integration.• CI/CD implementation on various projects via GitLab, then GitHub.• UX/UI design of graphical interfaces and their integration.
Reviews
Recommendations
FU
+3
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Education
- Architecte en technologies du numérique, Computer Engineering422016Architecte en technologies du numérique, Ingénierie informatique
- Microcomputer and Network Maintenance Technician Level 4, Computer ScienceIPI Institut Poly Informatique2014Technicien de maintenance en micro-informatique et réseaux niveau 4, Informatique