Freelancer profile translated to English.
Back to original languageAbout Houssem
Lead Angular / Node.js Developer | Business Applications Specialist
With **8+ years of experience**, specializing in the design and evolution of critical business applications.
I primarily work on systems already in production, with strong challenges related to performance, reliability, and scalability.
Expertise
- Backend architecture design with Node.js and NestJS (API, microservices, event-driven)
- Complex frontend development with React, Next.js, and Angular
- Optimization of existing systems (performance, technical debt, reliability)
- Deployment and operation of applications (CI/CD, containerization, cloud)
Types of Interventions
I typically intervene in contexts where it is necessary to:
- Take over a complex production project
- Stabilize and make a critical application reliable
- Improve performance and scalability
- Accelerate delivery on an existing product
Stack
- Backend: Node.js, NestJS, Python
- Frontend: React, Next.js, Angular
- Data: PostgreSQL, MySQL, MongoDB
- DevOps: Docker, Kubernetes, CI/CD, ArgoCD
- Cloud: Amazon Web Services, Microsoft Azure
French
Native or bilingual
English
Fluent
Arabic
Native or bilingual
Can work on-site
Paris (up to 50km)
Experience
- SNCF RESEAU - DGNUM - Paris - AST&Digital
On Malt
Angular/Node DeveloperTRANSPORTATIONJune 2024 - April 2026 (1 year and 10 months)Saint-Denis, FranceContext:STR-SDR project ("LAMARR"), an internal application developed with Angular and Nest.js, intended for SNCF teams for railway regeneration work planning.The tool allows visualization and management of operations via a calendar interface connected to business systems (work bank), with strong requirements for data reliability and readability.My Added Value- Key role within an Agile team (4 developers, PO, business experts), contributing to technical decisions and prioritization of critical tasks
- Design and development of complex new features (planning screens, calendar visualization), with a focus on performance and user-friendliness
- Leading the migration to Angular: adapting components, managing breaking changes, and securing deployment
- Contribution to the industrialization of deliveries via Jenkins and deployment on Microsoft Azure
- Continuous improvement of code quality (refactoring, code reviews, reduction of technical debt)
- Liaising with business teams to clarify needs, secure functional rules, and ensure the consistency of displayed data
- DomifaFullstack Developer Node.js | Angular | AIPUBLIC SECTORJune 2025 - January 2026 (7 months)Châtillon, France
- Integration and adaptation of DSFR (State Design System), ensuring interface compliance with accessibility standards (RGAA) and harmonizing UI components across the application
- Design and implementation of complex features in collaboration with product teams, focusing on maintainability, scalability, and performance
- Continuous improvement of software quality: identification and resolution of critical bugs, fixing security vulnerabilities, and implementing best practices (code reviews, standards, refactoring)
- Design of an AI workflow for RGAA compliance correction based on language models (LLMs), combining automated analysis (Axe, Lighthouse) and generation of contextualized recommendations for Angular components, integrated into the development cycle (code reviews and CI).
- Implementation of endpoints for managing residents (creation, update, status), appointment scheduling (slots, availability, cancellations), and package tracking (receipt, storage, pickup)
- Camptocamp France SASNode.js Developer | Angular | KubernetesPUBLIC SAFETYApril 2022 - May 2024 (2 years and 1 month)Paris, FranceContext:NEXSIS project based on a distributed microservices architecture, using Node.js (NestJS), PostgreSQL (via Sequelize), and Angular.Inter-service communication via messaging with RabbitMQ in an event-driven context.My Added ValueIntegrated into a team of 5 talented developers, I work with the Scrum agile methodology, primarily on the backend with Node.Js and with Angular on the frontend.My daily tasks include:
- Backend development in Node.js and Nest.js, using event sourcing for real-time and employing the Domain Driven Development approach on a CQRS architecture.
- Major contribution to the design and evolution of a microservices architecture based on CQRS and Event Sourcing patterns, within a Domain Driven Design logic.
- Development of backend services with NestJS, managing real-time flows through an event-driven architecture.
- Setup and optimization of inter-service exchanges via RabbitMQ (message management, reliability, service decoupling).
- Design and optimization of high-performance APIs (response time reduction, load management).
- Active participation in architecture decisions and technical design phases (grooming, design sessions).
- Development and integration of frontend components with Angular in collaboration with UX teams.
- Contribution to system reliability: incident investigation, critical bug fixing, and production patch deployment.
- Involvement in the DevOps chain: containerization with Docker, orchestration via Kubernetes, and CI/CD with GitLab CI.
- Active participation in team skill development through peer reviews and sharing best practices.
Reviews
Recommendations
FJ
+3
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Education
- Master in Computer Science, Computer EngineeringESTIAM, Information Technology School Applied to Business2018Master en informatique, Ingénierie informatique
Certifications
- Front-End Web Development with ReactCoursera2021