Youssef El Mkhantar

Within the Banking squad of SEQINO (Crédit Mutuel Arkéa Group), I participate in the development of the banking component of an electronic invoicing platform for accounting firms. This solution allows accountants to offer their professional clients the opening of a bank account directly from the application.

I am mainly involved in the backend part (80%), designing and developing microservices, REST APIs, and integrations with banking partners and compliance services.

Tasks

Development of microservices in Node.js and TypeScript.

Design and development of REST APIs for bank account opening workflows.

Integration of third-party services (KYC, KYB, document management, banking partners).

Development of asynchronous processing within an event-driven architecture (Kafka).

Implementation of audit and traceability mechanisms for banking operations.

Performance optimization (Redis, PostgreSQL).

Participation in technical design, code reviews, and architecture choices.

Development of front-end features in React when necessary.

Technical Environment: Node.js, TypeScript, React, PostgreSQL, Redis, Kafka, Keycloak, Docker, REST API, Microservices, DDD, Clean Architecture, Claude Code.

Telemedicine Platform — Video Conferencing & Patient Management

Involvement within a product team on a telemedicine platform integrating medical video conferencing and patient management, in a critical context with strong constraints on real-time, data security, and scalability.

Technical Environment

• React.js, Next.js, Node.js, TypeScript

• NestJS (modular architecture)

• WebRTC, mediasoup, Socket.io

• AWS: EC2, ECS, S3, Lambda, AWS SDK

• MongoDB, Event Sourcing

• Jest, React Testing Library, Vitest

• Agile Methodology (PO, UX/UI)

Achievements

✅ Development of critical medical video conferencing features on the front-end and back-end.

✅ Advanced WebRTC integration with mediasoup and connected medical devices.

✅ Implementation of an audit trail system based on Event Sourcing with MongoDB to ensure traceability of medical actions.

✅ Complete migration of the front-end from CRA to Vite.js + TypeScript to improve performance and maintainability.

✅ Optimization of application performance: caching, optimistic rendering, indexing, and reduction of loading times.

✅ Redesign of the medical document generation system with Next.js SSR and AWS Lambda/S3.

✅ Development and evolution of NestJS REST APIs.

✅ Development of an AI chatbot for assistance and automation of certain business workflows.

✅ Implementation of unit tests and improvement of software quality with Jest, RTL, and Vitest.

✅ Technical leadership and mentoring of a team of 2 developers.

Results

🚀 Improved real-time interaction performance.

🚀 Strengthened traceability and security of medical actions.

🚀 Modernized frontend architecture and improved overall maintainability.

State Web Conferencing Platform — Apitech

Contribution to the development of a critical web conferencing platform used by state services, with high requirements for security, scalability, and reliability.

Technical Environment

• React.js, TypeScript, Vite

• NestJS, legacy Express.js migration

• Microservices architecture

• RabbitMQ (event-driven architecture)

• MongoDB (sharding), Grafana

• Docker, Nginx, GitLab CI/CD

• Electron.js, Office Add-in React

Achievements

✅ Development of NestJS microservices: registration, user management, messaging, document management, etc.

✅ Development of the front-end from scratch with React.js & TypeScript.

✅ Implementation of a Design System with Storybook to harmonize the UI and accelerate development.

✅ Integration of OpenID Connect authentication systems: FranceConnect & AgentConnect.

✅ Progressive migration of legacy Express.js services to NestJS.

✅ Development of a data collection and visualization module with MongoDB (sharding) and Grafana.

✅ Development of a desktop application using Electron.js.

✅ Development of an Outlook extension (Office Add-in React).

✅ Optimization of front-end performance, accessibility, and user experience.

✅ Industrialization of deployments with Docker and GitLab CI/CD.

Results

🚀 Improved platform maintainability and scalability.

🚀 Standardization and industrialization of deployments.

🚀 Enhanced application performance and accessibility.