Kouseila Messas

Context: Within the digital division of Radio France, I design, develop, and maintain microservices (APIs and workers) that power the group's digital platforms.

Missions:

- Development and maintenance of microservices in Clean Architecture, with strict separation of layers and CQRS pattern.

- Design and exposure of REST and GraphQL APIs, including BFFs dedicated to front-end applications.

- Integration of external services and APIs (marketing CRM, media partner APIs like France Télévisions...).

- Development of RabbitMQ workers for asynchronous processing.

- Monitoring and observability of services (Elastic, Grafana).

- Unit and integration tests (Vitest, Jest, ava).

- API documentation (Swagger/TSOA) and code reviews.

- Participation in team rituals (daily, grooming, planning, demo, retro).

Technical Stack: TypeScript · Node.js · NestJs · Fastify · GraphQL · RabbitMQ · Kubernetes · Elastic · GitLab CI/CD

Context:

Within the development team at FDJ Gaming Solutions, I contributed to the development of games for international clients using an internal framework based on TypeScript.

Missions:

- Skill development on the internal framework.

- Development and maintenance of games in compliance with each lottery's guidelines.

- Implementation of unit tests with Jest.

- Continuous integration with GitLab CI/CD.

- Documentation (logic/game rules, test coverage, project configuration).

- Code review.

- Participation in team rituals (daily/estimation/project kickoff).

Technical Stack:

Languages: TypeScript.

Framework: Internal framework.

Technologies: Jest, GitLab CI/CD.Context: Within the development team at FDJ Gaming Solutions, I contributed to the development of games for international clients using an internal framework based on TypeScript. Missions: - Skill development on the internal framework. - Development and maintenance of games in compliance with each lottery's guidelines. - Implementation of unit tests with Jest. - Continuous integration with GitLab CI/CD. - Documentation (logic/game rules, test coverage, project configuration). - Code review. - Participation in team rituals (daily/estimation/project kickoff). Technical Stack: Languages: TypeScript. Framework: Internal framework. Technologies: Jest, GitLab CI/CD.

Context: Organic subscription e-commerce platform, built on an event-driven architecture of approximately 20 NestJS microservices in production on AWS (EKS), with a GraphQL API Gateway.

Missions:

- Design and development of about ten Node.js/NestJS microservices (REST APIs and workers), communicating via pub/sub using AWS SNS/SQS.

- Progressive migration from a Symfony monolith to decoupled microservices.

- Integration of numerous external services: Shopify (API, webhooks), Stripe (payments and subscriptions), Prismic (CMS), and bidirectional synchronization with two ERP/WMS.

- Synchronization of the product catalog from PIM Akeneo to Shopify, the internal OMS, and two successive ERP/WMS (migration from the first to the second): modeling and transformation of product sheets (attributes, variations, channels) to feed each system; progressive migration from a Symfony monolith to decoupled microservices.

- Utilization of PIM Akeneo data (weight, volume, dimensions) to feed the order split algorithm, determining the number and type of cartons per order based on the carrier.

- GraphQL API Gateway (Apollo Server) aggregating various data sources.

- Product search with Elasticsearch and Algolia; DynamoDB persistence and Redis cache.

- Kubernetes deployment (EKS) with Helm, Terraform infrastructure, Datadog observability (APM, logs, metrics).

- Resolution of production incidents and bugs.

Technical Stack: TypeScript · Node.js · NestJS · Apollo GraphQL · PostgreSQL · DynamoDB · Redis · Elasticsearch · Algolia · BigQuery · Firebase · AWS (SNS/SQS, Lambda, S3, EKS) · Docker · Kubernetes · Terraform · Datadog · Jest