Rayen Fassatoui

• Designed and architected an AI-powered Applicant Tracking System to modernize recruitment workflows for HR teams and decision-makers. • Implemented PostgreSQL with pgvector to build semantic CV-to-job matching using embeddings and vector search. • Engineered LLM workflows for OCR-based resume processing, structured candidate scoring, and interview-question generation. • Built an AI chat interface allowing managers to query recruitment statistics and dashboard metrics in natural language. • Developed a type-safe application with Next.js 16, TypeScript, React Server Components, Drizzle ORM, FastAPI, RBAC, Tailwind CSS, and shadcn/ui.

• Built a job-matching platform with Next.js, Laravel, and AI matching algorithms to improve hiring efficiency and candidate-company fit. • Developed dynamic interfaces with React, TypeScript, Tailwind CSS, and shadcn/ui; integrated REST and GraphQL APIs. • Improved performance with SSR and code splitting, increasing user engagement by 60% and reducing time-to-hire by over 40%.

• Delivered practical full-stack development training using real-world examples, project-based exercises, and hands-on coding sessions. • Helped students strengthen debugging and problem-solving skills, contributing to a 15% increase in cohort employability.

• Built conversion-focused landing pages with Next.js 15, React 19, TypeScript, Tailwind CSS, and shadcn/ui. • Implemented backend data models and API endpoints with Prisma ORM on Neon serverless PostgreSQL. • Developed secure Next.js Server Actions with Auth.js v5 and integrated Gemini Flux AI generation workflows.

• Developed internal maintenance and project-tracking modules with Spring MVC, JSF, Oracle, SQL, HTML, and CSS. • Increased operational visibility by 30% and reduced reporting time by 40% through improved internal tooling. • Built an analytics dashboard for employee presence, tasks, and invoices, reducing decision-preparation time from 2 days to 30 minutes. • Created web and email notifications for expiring contracts and due invoices, reducing missed maintenance sessions to 1%.

• Built a responsive promotional website for the ’Japan New Year’ event using React, Chakra UI, and SCSS, successfully handling all visitors and increasing attendee engagement by 40% compared to flyers. • Engineered robust RESTful backend services using Node.js and Express.js, integrating with MongoDB and MySQL to ensure 99.5% uptime and streamline client data handling during peak traffic.

• Engineered a secure investment platform frontend (React, Chakra UI) and backend (Node.js, Express.js, PostgreSQL), achieving 99.9% uptime with zero security breaches while processing user requests around Tunisia. • Optimized database queries (PostgreSQL) and collaborated on new features, improving application responsiveness by 20% and increasing user trust scores by 25% compared to old website design

• Developed dynamic frontend interfaces for client websites using React.js, incorporating engaging animations and advanced filtering, increasing average user session duration by 30%. • Implemented backend solutions and RESTful APIs using Node.js, Express.js, and SQL, improving data retrieval speeds by 40%

• Developed full-stack features for client websites using Blazor and ASP.NET on .NET 6, successfully delivering assigned tasks on time and contributing to team productivity