👨‍💻 Hamza El Moueddane

Full-Stack Engineer | SaaS Architect | 42 School Graduate | Open Source Contributor

I'm a Senior Full-Stack Engineer with a passion for building production-grade SaaS platforms, scalable systems, and innovative solutions. Currently architecting Fider — a comprehensive ERP system for car-rental agencies in Morocco.

With a strong foundation from 42 School and hands-on experience across the entire tech stack, I transform complex business requirements into elegant, maintainable code. I'm equally comfortable designing databases, architecting microservices, building responsive UIs, or optimizing DevOps pipelines.

• Frameworks: NestJS, Express.js, Fastify, Node.js
• Databases: PostgreSQL, MongoDB, Redis, MySQL, Prisma ORM
• Patterns: Clean Architecture, SOLID Principles, Microservices, Event-Driven
• Security: JWT Auth, OAuth2, RBAC, HMAC, Rate Limiting, IDOR Prevention
• APIs: RESTful APIs, GraphQL, WebSockets, Real-time Systems
• Payment Systems: Invoice reconciliation, Decimal precision math, Subscription management

• Frameworks: React 19, Next.js 16 (App Router), Vue.js
• Styling: Tailwind CSS v4, SCSS, Styled Components, CSS Modules
• Languages: TypeScript, JavaScript
• State Management: Redux, Zustand, Context API
• Performance: Core Web Vitals, Bundle Analysis, Code Splitting
• UI/UX: Responsive Design, Accessibility (WCAG 2.1), Mobile-First

• Containerization: Docker, Docker Compose
• CI/CD: GitHub Actions, Automated Testing, Deployment Pipelines
• Cloud: AWS, Azure, DigitalOcean, Vercel, Netlify
• Linux: Shell scripting, System administration, Process management
• Monitoring: Logging, Performance monitoring, Error tracking

• Application Security: OWASP Top 10, Input Validation, SQL Injection Prevention
• Database Security: Transaction safety, Encryption, Secure migrations
• Authentication: JWT, OAuth2, Session management
• Data Protection: GDPR compliance, Data privacy, PII handling
• Audit Trail: Compliance logging, Action tracking

• Financial Systems: Payment processing, Invoice management, Accounting
• Multi-Tenant Architecture: Tenant isolation, Cross-tenant security
• Subscription Management: Billing cycles, Plan limits, Usage metering
• Analytics & Reporting: Data aggregation, KPI tracking, Business intelligence

Production-grade multi-tenant car-rental management system for Morocco

Tech Stack:

• Backend: NestJS + Prisma + PostgreSQL
• Frontend: React 19 + Next.js 16 + Tailwind CSS v4
• DevOps: Docker, Docker Compose, GitHub Actions

Key Achievements:

• ✅ 11 Production Phases Completed — From security hardening to SaaS business layer
• ✅ 22 Domain Models — Agency, User, Car, Booking, Invoice, Payment, Trust Network, etc.
• ✅ Multi-Tenant Architecture — Complete tenant isolation with cross-tenant trust network
• ✅ Capability Engine (5A) — Fine-grained role-based access control with presets (OWNER/MANAGER/AGENT)
• ✅ Consent & Privacy (5B) — Secure renter document vault with time-boxed consent grants
• ✅ SaaS Business Layer (11) — Plan catalog, subscription management, usage metering, founder impersonation
• ✅ Financial Precision — Decimal-based money math, invoice reconciliation, payment processing
• ✅ Security Hardening (Phase 0-1) — IDOR prevention, rate limiting, audit logging, identity hashing
• ✅ Phase 12 Design Rebuild — Premium "Fider Lux" UI with warm graphite/brass aesthetic

Phase Status: 11/12 complete | Design rebuild in progress

📖 Full Documentation | 📊 Architecture Guide

Multiple full-stack e-commerce implementations showcasing modern web technologies:

• Next.js + Saleor Integration — Modern headless commerce with GraphQL
• Tailwind E-commerce Sites — Responsive, accessible shopping experiences
• Product Catalog Systems — Inventory management, filtering, search optimization

TypeScript-based portfolio platform demonstrating:

• Modern React patterns
• Interactive UI design
• Image optimization
• Portfolio management systems

Flutter-based mobile app showcasing:

• Cross-platform development
• Real-time data synchronization
• Mobile-first UI/UX
• Food delivery/ordering system

• Microservice Log Aggregation (microservice-logscape) — Distributed logging system
• Instagram Analytics Tool — Social media data analysis
• macOS Locker — System security tool with shell scripting
• CTF Helper — Cybersecurity competition utilities

Foundation coursework in systems programming and algorithms:

• LIBFT — Custom C standard library implementation
• PRINTF — Printf function recreation in C
• MINITALK — Inter-process communication using signals
• IRC Server — Internet Relay Chat server in C++
• 42 Projects Collection — Full coursework portfolio

Total Repositories    ████████░░ 40+ projects
Primary Languages     ████████░░ TypeScript, JavaScript, Python, C
Full-Stack Projects   ████████░░ 15+ applications
Open Source Contrib   ████████░░ Active contributor
42 School Rank        ████████░░ Advanced level

• 42 School (1337-Med) | Systems Programming, Data Structures, Algorithms

  • Curriculum: C programming, Unix systems, shell scripting, sorting algorithms
  • Projects: Complete coursework with 100+ coding hours

• Self-Directed Learning | Modern web technologies, cloud architecture, SaaS patterns

  • Focus: Full-stack JavaScript ecosystem, DevOps, system design

Building production-grade multi-tenant systems with:

• Tenant isolation & security
• Subscription management
• Usage-based metering
• Audit trails & compliance

Designing money-critical applications:

• Decimal-precision arithmetic
• Invoice reconciliation
• Payment processing
• Accounting integrations

Implementing secure systems:

• IDOR prevention
• Authentication & authorization
• Rate limiting & throttling
• Audit logging
• Data privacy & GDPR compliance

Delivering fast, scalable applications:

• Database query optimization
• Caching strategies (Redis, browser)
• Bundle size reduction
• Core Web Vitals optimization
• Microservices architecture

• ✅ Architected and deployed Fider — a production-grade multi-tenant SaaS with 11 phases completed
• ✅ Implemented fine-grained RBAC with capability presets and cross-tenant trust networks
• ✅ Built secure payment systems with Decimal precision and invoice reconciliation
• ✅ Created DevOps pipelines with GitHub Actions for CI/CD automation
• ✅ Established 42 School coursework excellence in systems programming
• ✅ Designed responsive, accessible UIs following WCAG 2.1 standards
• ✅ Mentored & collaborated on multiple full-stack projects

🎯 Actively Building: Fider SaaS Platform — Phase 12 (Design rebuild) → Phase 13 (Deployment & hardening)

🎨 Design System: "Fider Lux" — Premium, warm aesthetic with graphite/brass/violet color palette

📚 Learning: Advanced system design, Kubernetes orchestration, AI integration patterns

I'm enthusiastic about:

• 🚀 Startup challenges — Building MVPs and scaling products
• 💼 Consulting — Architecture design, code reviews, technical guidance
• 🎯 Open Source — Contributing to community projects
• 📚 Technical Content — Writing blogs, sharing knowledge, mentoring developers