Freelancer profile translated to English.
Back to original languageAbout Walid
Senior Fullstack Developer with 10+ years of experience, specializing in TypeScript, Node.js, React, Next.js, and NestJS. I help companies design and evolve scalable and performant SaaS platforms.
I mainly focus on:
• End-to-end feature development (front + back)
• API design and backend architectures (microservices)
• Refactoring and improving existing code
• Integrating external APIs
• Performance and scalability optimization
• Implementing best practices (testing, CI/CD, clean code)
I have worked in startup/scale-up environments with a strong product and delivery culture.
🔧 Stack: Node.js • NestJS • React • Next.js • TypeScript • GraphQL • PostgreSQL • MongoDB
☁️ Cloud: AWS (Certified Cloud Practitioner), Docker, CI/CD
🤖 AI: Daily use + LLM integration (agents, automation)
French
Native or bilingual
English
Fluent
Arabic
Native or bilingual
Can work on-site
Paris (up to 50km)
Experience
- DGFiPTech LeadPUBLIC SECTORAugust 2025 - March 2026 (7 months)Paris, FranceTech Lead of a team composed of 7 developers, 1 QA, 1 Product Owner, and 1 Product Manager within the user experience department of DTNum.The project is a WYSIWYG Web Builder for mockups/prototyping based on NodeJS and VueJS frameworks, using the GrapesJS framework for the Drag & Drop part.
- Lead the technical team in the development and maintenance of the State Web Builder.
- Ensure the quality, performance, and security of software solutions, in close collaboration with stakeholders to guarantee that products meet user needs and regulatory requirements.
- Guide the development team in best development practices.
- Make strategic technical decisions for the project, ensuring the technical and architectural consistency of the product.
- Participate in fullstack Node.js / Vue.js development.
- Manage and participate in the maintenance of CI/CD pipelines, automation of deployment and monitoring processes.
- Ensure the availability, reliability, and security of applications in production.
- Vallourec (AE)Tech Lead / Fullstack Node.js & React DeveloperENERGY AND UTILITIESJanuary 2025 - August 2025 (7 months)Meudon, FranceDevelopment of an internal business entity management platform organized around an Nx monorepo structured into microservices (NestJS, PostgreSQL) and web and mobile applications (React, React Native).
- Evolution from fullstack developer to Tech Lead, with technical and managerial responsibilities.
- Structuring the monorepo with Nx and pnpm for better scalability and code sharing.
- Optimization of GitLab CI/CD.
- Complete refactoring of CI pipelines: reducing execution time from 30 min to 10 min.
- Integration of Fastlane for automation of mobile builds and deployments (iOS & Android) with management of flavors and schemes.
- Implementation of a serverless solution with AWS Lambda to offload certain backend tasks, optimize costs, and improve scalability.
- Enhancement of code quality:
- Integration of SonarQube, definition of quality rules.
- Setup of a shared linter (ESLint, Prettier) across the monorepo.
- Development of fullstack features: NestJS microservices on the backend, React/React Native interfaces on the frontend.
- Infrastructure & DevOps:
- Provisioning via Terraform, deployment on AWS (ECS/Fargate, Lambda, RDS), orchestration with Kubernetes.
- Technical mentoring & recruitment:
- Active participation in technical casting, interviews, and onboarding of new members.
- Daily support to the team (CLI scripts, documentation, custom tooling).
- Société GénéraleSenior Fullstack Developer & DevOpsBANKING AND INSURANCEJanuary 2023 - December 2024 (1 year and 11 months)Paris, FranceDevelopment of the web console to expose services of Société Générale's private and hybrid cloud.- Implementation of a progressive migration strategy to allow coexistence of the old and new versions.- Setup of CI/CD pipelines.- Migration from Jenkins to GitHub Actions.- Writing technical documentation.- MongoDB multi-replication architecture: Design and implementation of a MongoDB replication architecture to ensure high availability and increased resilience in case of failure.- Setup of backup strategies: Development and deployment of backup and recovery solutions for MongoDB databases, ensuring resilience in case of failure.- Backend development: Creation of performant and scalable backend services with NestJS, following best architectural practices.- Frontend development: Development of interactive and responsive frontends with Next.js, integrating modern designs and a fluid user experience.- Databases: Design and management of MongoDB databases, optimized for performance and rapid data retrieval.
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Education
- Software Engineering DegreeNational Engineering School of Sousse2016
- Preparatory CyclePreparatory Institute for Engineering Studies of Monastir2013
Certifications
- AWS Certified Cloud PractitionerAmazon Web Services (AWS)2024