Freelancer profile translated to English.

Description

Full Stack Developer specializing in modern web applications and SaaS solutions. I help companies design and develop high-performing, secure, and scalable platforms with a strong focus on product and user experience.

Expert in Frontend and Backend development with modern JavaScript/TypeScript technologies: Angular, Next.js, React, Node.js, NestJS, and MongoDB/PostgreSQL.

I also work on electronic signature, document management, electronic invoicing, and business automation solutions, with particular attention to security, scalability, and regulatory compliance in France.

Founder of the SaaS project “To Sign It”, a platform dedicated to electronic signature and professional document management.

Languages

French
Native or bilingual
English
Fluent
Arabic
Native or bilingual

Workplace preferences

Can work on-site

Paris (up to 50km)

To Sign It
Founder & Lead Architect
April 2023 - April 2026 (3 years)
To Sign It — B2B SaaS Platform for Signatures & Invoicing
Founder & Lead Architect · Full Stack · 2023 – Present · tosignit.com

• Complete architecture of a secure PDF, Word, and Excel document visualization engine (high-fidelity rendering in a sandboxed environment)
• Implementation of a custom proxy and security middleware with strict CSP rules, domain filtering, and Supabase RLS policy for document compliance and legal signature lifecycle
• eIDAS compliance, 2026 electronic invoicing reform (Factur-X / UBL), legal archiving, immutable audit trail with SHA-256 hash
• Stripe Billing integration (Individual & Business plans, monthly/annual billing, usage quotas enforcement)

Technologies: Next.js 15 · NestJS 10 · TypeScript · Supabase RLS · PostgreSQL · Clerk Auth · Stripe · AWS S3/SNS/SES · Cloudflare WAF · Tailwind · shadcn/ui
NestJs Next.js Typescript PostgreSQL External API Integration
To Sign It
Lead Mobile Developer · Expo 52 / React Native
December 2023 - April 2024 (4 months)
Signature-on-the-Go — React Native Mobile Application
Lead Mobile Developer · Expo 52 / React Native ·

• Offline-First Architecture with real-time synchronization via Supabase Realtime and automatic conflict resolution
• Integrated Mobile CRM module: lead qualification, signature pipeline tracking, contextual push notifications (signature events, reminders, validation)
• Mobile eIDAS Security: biometrics (expo-local-authentication), JWT in Keychain/Keystore, device fingerprinting, certificate pinning, session timeout
• High-fidelity document rendering pipeline (PDF, Word, Excel) in a secure viewer with Reanimated gestures, native zoom, and encrypted download from AWS S3

Technologies: Expo 52 · React Native 0.76 · Reanimated · NestJS 10 (API) · Supabase Realtime · AWS S3 · Upstash Redis · expo-secure-store
React Native NestJs Redis External API Integration Mobile App Deployment
To Sign It
Architect & Lead Developer · eIDAS / PAdES / GDPR
July 2025 - January 2026 (6 months)
Vanguard — High-performance Java Microservice · Document Security & Integrity
Architect & Lead Developer · eIDAS / PAdES / GDPR · 2024 – 2025

• Integration of AI Agentic (Gemini 1.5): document reasoning engine for automated risk audits, signatory extraction, and semantic classification
• Vanguard Privacy Shield (GDPR compliance): real-time PII masking engine (emails, phone numbers) before any cloud AI transmission, via custom DLP regex
• PAdES/eIDAS Cryptographic Engineering: advanced digital signatures with BouncyCastle and PDFBox, active integrity verification via document hash
• Legal non-repudiation evidence system: generation of structured audit JSON tracing the chain of custody, for enterprise compliance

Technologies: Java 17+ · Spring Boot 3 · Spring WebFlux · LangChain RAG · Gemini 1.5 API · BouncyCastle · PDFBox · Docker · Nginx · OVH Cloud
Java Spring boot Spring Webflux BouncyCastle Data Privacy