YoussefSahih
Frontend & Fullstack Engineer
Fullstack Engineer with 3+ years building production systems across the entire stack — React/Next.js frontends, NestJS/Node.js backends, PostgreSQL databases, and containerized cloud deployments. Experienced in real-time architecture, REST API design, JWT/OAuth authentication, CI/CD pipelines, and AI-powered integrations.
Fullstack Engineer with 3+ years building production systems across the entire stack — React/Next.js frontends, NestJS/Node.js backends, PostgreSQL databases, and containerized cloud deployments. Currently a Frontend Developer at Im'enSe, building QHSE-sector web applications with React 18 and TypeScript.
Pursuing an Advanced Software Engineering degree (Équivalent Bac +5) at 1337 — part of the 42 Network — with a curriculum built on systems programming, algorithms, network architecture, and peer-to-peer collaboration with no lectures and no instructors.
Frontend
Backend
Auth & Security
Database
DevOps & CI/CD
AI & LLM
Testing & Tools
My professional journey and key accomplishments in the tech industry.
Frontend Developer
Im'enSe
Building QHSE-sector web applications with React 18 and TypeScript.
Key Achievements:
- Developed and maintained 30+ React 18 modules using TypeScript, Redux Toolkit, and RTK Query in production
- Reduced page load time by 35% via code splitting, lazy loading, and SSR/SSG optimization
- Resolved non-deterministic hook ordering bugs and optimistic UI timing issues through precise cache lifecycle management
- Delivered end-to-end i18n pipeline across 7 languages; collaborated with backend on REST API contracts and payload design
Fullstack Developer (Freelance)
Fiverr
Delivered custom web applications for international clients.
Key Achievements:
- Delivered 20+ custom web apps for international clients using React.js, Next.js, Node.js, and PostgreSQL
- Built REST APIs with JWT auth, input validation, rate limiting, and error handling middleware; deployed via GitHub Actions CI/CD
- Managed full project lifecycle — scoping, architecture, development, deployment — across multiple concurrent engagements
Architected full-stack end-to-end: Next.js frontend, NestJS REST API, PostgreSQL/Prisma backend. Implemented JWT auth with OAuth 2.0, 2FA, refresh token rotation, rate limiting, and guard middleware. Engineered real-time multiplayer with Socket.io, matchmaking, and full chat system with public/private channels. Containerized with Docker Compose.
Dual-pipeline Electron desktop app: offline local Whisper inference + cloud AssemblyAI diarization. Node.js backend for audio chunking, model orchestration, and streaming JSON updates to React UI. Claude API for transcript-grounded research chat; packaged via Electron Builder with GitHub Actions CI/CD.
Internet Relay Chat server implementing the IRC protocol to C++98 standard with multi-client support, channel management, and operator commands.
A Bash-like Unix shell written in C. Implements command execution, built-ins (cd, echo, pwd, export, exit), input/output redirection (<, >, >>, <<), pipelines, environment variable expansion, and Unix signal handling (Ctrl+C/Ctrl+\/Ctrl+D).
A Python tool that fetches Common Vulnerabilities and Exposures (CVE) data from the National Vulnerability Database (NVD), filters and processes it with pandas, and surfaces vulnerability descriptions for analysis.
Docker-based multi-container infrastructure with Nginx, WordPress, and MariaDB. Custom Dockerfiles only — no pre-built images. TLS via self-signed certificates.
First-person 3D raycaster in C using miniLibX. Implements DDA algorithm for wall rendering, texture mapping, and player collision detection.
My academic background and educational qualifications that have shaped my skills and knowledge.
1337 Coding School — 42 Network
Advanced Software Engineering Program (Équivalent Bac +5)
📍 Khouribga, Morocco
Algorithms & Data Structures, System Programming, Network Programming, Web Architecture, Relational Databases
Chouaïb Doukkali University
Associate's Degree in English Studies
📍 El Jadida, Morocco
Have a project in mind or want to collaborate? I'd love to hear from you.