Freelancer profile translated to English.
Back to original languageAbout Walid
Expert TypeScript, specializing in Node.js, NestJS, and AWS serverless architectures: I deliver scalable, maintainable solutions, on time.
I design high-performance TypeScript backends and modern web applications for growing companies.
🎯 WHAT I DO FOR YOU
✓ Robust and documented REST/GraphQL APIs
✓ Fullstack applications (Next.js + React + headless CMS)
✓ JS → TypeScript migration without service interruption
✓ Backend architecture on AWS (Lambda, DynamoDB, CloudWatch)
✓ Refactoring and optimization of existing applications
✓ Performance audit and architecture consulting
Recent example: optimization of a critical DynamoDB API at Allianz Trade (from 16s to 2s), impacting 50K+ daily users in 38 countries.
🛠 TECHNICAL STACK
Node.js • NestJS • TypeScript • React • Next.js • AWS • PostgreSQL • MongoDB • Railway • Vercel
💼 AVAILABLE FOR FREELANCE
→ Short, medium, or long-term projects
→ Consulting and technical audit
→ From-scratch development
📅 Free discovery call (30min): cal.com/walid-mos/30min
🌐 nextnode.fr
French
Native or bilingual
English
Fluent
Can work on-site
Paris (up to 50km), Lille (up to 50km), Grenoble (up to 50km), Lyon (up to 50km), Bordeaux (up to 50km)
Experience
- Maison de luxe francaiseSenior Software EngineerLUXURY GOODSNovember 2025 - March 2026 (4 months)Paris, FranceDesign and development of 2 iOS applications deployed in about twenty high-end stores internationally, for an emblematic French luxury house.→ QR Code Printing Management Application: scalable backend architecture (Node.js/Express), integration of an industrial printing system, real-time queue management, and monitoring dashboard.→ Store Management & Appointment Booking Application: omnichannel solution (mobile + web) covering client appointment management, store schedule organization, and VIP visit tracking.Implementation of an API-first architecture with secure authentication, role management, and real-time synchronization between applications. React Native / Expo mobile development integrating iOS 26's Liquid Glass design system.Stack: Node.js, Express, React Native (Expo), React, PostgreSQL, AWS (S3, Lambda).
- Allianz TechnologySoftware EngineerBANKING AND INSURANCEMarch 2024 - August 2025 (1 year and 5 months)Paris, FranceOverhaul and migration of JS projects to TypeScript, serving as the expert on TypeScript and DynamoDB. Implementation and optimization of serverless APIs on AWS (Lambda, DynamoDB, CloudWatch). Advanced management of user permissions within the User Management team.Technical stack: AWS (Lambda, DynamoDB, CloudWatch), NodeJS, TypeScript.
- IgocreateFullstack DeveloperSOFTWARE PUBLISHINGFebruary 2022 - November 2023 (1 year and 9 months)Paris, FranceDevelopment of a CRM back-office for the client Certigo: design and implementation of the CRM trainee, trainer, and product management module, including an interactive training calendar, available on web and mobile applications. Complete overhaul of the internal Igowall project under SvelteKit, with modernization of the architecture and user interface.Stack: Node.js, Ansible, SvelteKit.
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Education
- Master of Management and Consulting in Information Systems, Project ManagementESGI2020Master Management et Conseil en Systemes d'Informations, Management de projet
- BTS in Information Systems Services, SLAM option, Computer ScienceLycée Voillaume2017BTS SIO option SLAM, Informatique