Rayen.
Hi, I'm Rayen — Tunisian Web DeveloperTN

Crafting the intelligence of the web.

Passionate Fullstack AI Engineer with experience architecting and developing intelligent web applications. Specialized in modern technologies like Next.js, React, Node.js, and PostgreSQL, while deeply integrating AI capabilities such as LLMs, RAG pipelines, and vector databases (pgvector). Skilled in bridging the gap between robust backend systems, dynamic user interfaces, and advanced AI models to deliver practical, scalable, and user-focused digital solutions.

Experience

My career journey.

Full Stack AI Engineer

Capgemini EngineeringHybrid

Designed and architected an AI-powered Applicant Tracking System (ATS) to modernize the recruitment pipeline for HR teams and decision-makers. Implemented pgvector in PostgreSQL to create a semantic search engine matching CV pools with job requirements using AI embeddings. Engineered an 'Autopilot' feature utilizing LLMs to parse and score candidate resumes (OCR) and dynamically generate structured interview questions. Built an AI chat interface allowing managers to query complex recruitment statistics and dashboard metrics using natural language. Developed a type-safe, feature-driven application using Next.js 16, TypeScript, and Drizzle ORM. Crafted a responsive, minimalist interface with Tailwind CSS and shadcn/ui, featuring custom AI loading states and role-based dashboards (RBAC).

Feb 2026Present

Full-stack Developer

Aquil AppContract

Built a job-matching platform using Next.js, Laravel, and AI algorithms to solve inefficiencies in traditional hiring. Implemented dynamic UIs with shadcn/ui, integrated REST and GraphQL APIs, and optimized performance with SSR and code splitting. Boosted user engagement by 60% and reduced time-to-hire for companies by over 40%.

Jul 2025Oct 2025

Full-stack Developer

Storegen.aiContract

Built modern landing pages with Next.js 15, React, TypeScript, Tailwind CSS, and shadcn/ui components to maximize visitor-to-customer conversion. Implemented backend data models and API endpoints using Prisma ORM on Neon serverless PostgreSQL, exposing Next.js Server Actions and securing routes with Auth.js v5. Integrated AI generation workflows via Gemini and Flux API within Server Actions, persisting AI-generated data through Prisma.

Jan 2024Apr 2024

Freelance Trainer

FRTN Technologies Tunisie

Fostered a hands-on learning environment using real-world examples, enhancing student problem-solving skills and contributing to a 15% increase in cohort employability.

Oct 2024Dec 2024

Web Developer

Générale Tunisienne De L'Informatique | GTI

Developed and integrated new modules for internal maintenance and project tracking tools using Spring MVC, JSF, and Oracle, increasing operational visibility by 30% and reducing reporting time by 40%. Architected and implemented a full-stack analytics dashboard to monitor employee presence, tasks, and invoices. Created a web and email notification system to inform employees of expiring contracts or due invoices.

Feb 2023Jul 2023

Web Developer

AJico GroupRemote

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%. Engineered robust RESTful backend services using Node.js and Express.js, integrating with MongoDB and MySQL to ensure 99.5% uptime.

Dec 2022Feb 2023

Web Developer

CIN Group

Engineered a secure investment platform frontend and backend, achieving 99.9% uptime with zero security breaches. Optimized database queries and collaborated on new features, improving application responsiveness by 20% and increasing user trust scores by 25%.

Aug 2022Jan 2023

Web Developer

Smart Kokusai

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

Jul 2022Aug 2022

Junior Developer

Alidade Tunisia

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.

Jul 2022Jul 2022

Education

Academic background.

Engineer's Degree, IRM-Opt. Embedded and Mobile Systems Engineering

Polytech Intl
2024Expected 2026

Bachelor's Degree, Computer Science

Polytech Intl
20212024

Certifications

Continuous learning.

MTA: Introduction to Programming Using Python

Microsoft

Foundational C# with Microsoft

Microsoft / freeCodeCamp

IT Specialist - HTML and CSS

Certiport

Fullstack Development Certificate

Professional Certification

Skills

Technical stack.

LLMs
RAG Pipelines
Vector Databases
LangChain
AI Agents
Prompt Engineering
NVIDIA NIM
OpenAI API
Next.js
React & React Native
TypeScript
JavaScript
Tailwind CSS
Shadcn UI
Framer Motion
Python
Node.js
FastAPI
Express.js
Java
Spring Boot
PostgreSQL
Prisma
Drizzle ORM
MongoDB
Supabase
Firebase
Docker
Git
RESTful APIs
Auth.js
CI/CD
Testing (Jest, JUnit)

Values & Expertise

What I bring to the table.

Frontend Engineering
Full-Stack Development
API Design & Integration
AI Systems Engineering

Selected Work

A showcase of minimal aesthetics and complex logic.

PharmAI
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PharmAI

Production-grade, multi-tenant RAG platform for pharmaceutical regulatory compliance powered by NVIDIA NIM and pgvector.

PythonFastAPITypeScriptNext.jspgvector
ClearSprint AI
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ClearSprint AI

AI-powered Linear ticket management. Connect your workspace, edit tickets with generative AI, review visual diffs, and sync changes.

Next.jsTypeScriptLinear SDKshadcn/uiOAuth
AltScore AI
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AltScore AI

Advanced API scoring model platform. Analyzes 32 dynamic feature categories to assign secure scoring for applicant profiles and risks.

FastAPIPythonMachine LearningREST APIDocker
FlowMatic
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FlowMatic

Powerful visual workflow builder and automation engine. Create complex step-by-step automations, client portals, and track requests.

Next.jsTypeScriptPrismaTailwind CSSZustand
NeonSchemaPilot
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NeonSchemaPilot

AI-Powered Database Studio. Interact with your Neon DB using an AI Assistant, generate data visualizations, and monitor query performance.

Next.jsAI AssistantPostgreSQLNeonChart.js
WriteFlow
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WriteFlow

Sophisticated SaaS platform leveraging artificial intelligence to streamline and enhance content creation for modern marketers.

Next.jsOpenAI GPTPostgreSQLPrismaTailwind CSS
Entretien AI
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Entretien AI

Interview practice platform offering instant AI feedback. Land your dream role by practicing situational and technical questions.

Next.jsReactAI generationTailwindCSSPostgreSQL
OptimumCV
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OptimumCV

AI-Powered CV creator. Import existing CVs, optimize with AI suggestions, and export beautiful PDF documentations perfectly formatted.

Next.jsTypeScriptGenerative AIReact PDF
AI Powered Data
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AI Powered Data

A modern web application providing AI-powered data analysis, dashboard metrics, and rich visualization capabilities.

Next.jsTypeScriptLangChainTogether AIPrisma
Indigenes
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Indigenes

Investment platform focused on agricultural opportunities in Africa. Empowering investors to utilize their land assets for farming.

ReactViteNode.jsExpressMongoDB