Leonard Roussard
Open for opportunities

Leonard Roussard

Freelance developer specialized in Web, AI and Design

Picture of Leonard Roussard
user laptop
Professional Profile
I bring a deep passion for creating digital solutions that harmonize design and functionality. My journey began with a fascination for seamless, intuitive experiences inspired by industry leaders like Apple, shaping my dedication to crafting user-centered products that go beyond aesthetics to enhance efficiency and simplicity.
Based in Paris, France
Next Adventure
Seeking a 6-month internship abroad (not in France) in one of these exciting fields:
  • Human-Computer Interaction & Interface Design
  • Creative Technology & Design Engineering
  • Applied AI & Machine Learning

Starting January/February 2025 • International Opportunities

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Work Experience

Freelance developer and entrepreneur with expertise in web development, focusing on premium design and user-centered experiences.

Freelance Developer

2021 - Present
Self-employedFull-Time
Paris, France

Specialized in full-stack development, design, AI, and Discord bot development. Created custom solutions using Node.js, Next.js, MongoDB, and various API integrations. Notable projects include LDV Sentinel for esports management and Piepacker support system.

2018 - 2021
LDV EsportManagement
France

Managed esports teams using NLP and psychology techniques. Responsible for player recruitment, team organization, and conflict resolution. Developed custom management tools and scheduling systems on discord.

2021 - 2022
Etude AlphaPart-Time
Paris, France

Provided comprehensive tutoring in mathematics, French, English, and physics up to high school level. Developed personalized teaching approaches for individual student needs.

2020 - 2024
Barry Rogliano SallesInternship
Paris, France

Completed a 3-month internship. Created a monitoring dashboard for the IT team using Centreon, and exported data that was locked by third party using Node.js and Postman.

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Education

Currently studying data and AI, with a focus on applying these technologies to web development and design.

Master in Data & AI Engineering

ESILVData Science & AI
2019 - Present

Online UX/UI Design Course

MemoriselyUX/UI Design, Figma
2023 - 2024

Lower Sixth year IB

Scarborough CollegePhysics, Maths, Chemistry, Economics
2018 - 2019

Web Development, algorithms & data structures

Self-TaughtFrontend & Backend
2018 - Present

3D CAD Autodesk Course

Stanford USA - ID Tech3D CAD
2014
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Notable Projects

Significant projects and technical achievements.

2025
Next.js, Trigger.dev, Vercel AI SDK, Browserbase, NLP, RAG, OpenAI Embeddings

Built a data-driven restaurant recommendation platform for Paris using web scraping techniques. Developed an elegant interface to analyze and display restaurant reviews, ratings and insights. Implemented custom scraping algorithms and data processing to help users find the best dining experiences based on aggregated review data.

Redis, Next.js, OpenAI API, Vercel AI SDK

Developed a modern portfolio platform with a focus on developer profiles. Features include dynamic content management, real-time Markdown editing, and seamless project showcasing. Built with a premium design aesthetic and optimized performance.

Revenue Management System

2024
Galadrim - Agence CrehoPostgreSQL, Adonis.js, Inertia

Developed a revenue management platform for hotels, focusing on data analytics and PMS integrations. Optimized PostgreSQL for large datasets and implemented complex data visualization features.

ImpulseNext.js 14, TypeScript, Tailwind CSS, Framer Motion

Designed and developed a premium landing page for my web development agency. Features smooth animations, responsive design, and modern UI components. Implemented advanced scroll animations and interactive elements to showcase our expertise in creating high-end digital experiences.

Offline-First PWA

2024
Galadrim - CEANext.js, Service Workers, Vercel Blob, Payload CMS

Built a robust Progressive Web App with complete offline functionality for sensitive industrial environments. Implemented advanced caching strategies and secure media handling with Vercel Blob storage.

AI Support Chatbot

2023 - 2024
Barry Rogliano SallesOpenAI API, Next.js, Assistants API, Vercel AI SDK

Created an AI-powered IT support chatbot with data visualization, CSV conversion, and Microsoft Graph integration. Leveraged OpenAI's Assistant API for intelligent file-based queries.

2023 - 2024
MongoDB, Redis, Next.js

Led development of a dating app featuring personality-based matching, QR code scanning, and Typeform-inspired onboarding. Implemented MongoDB, Redis caching, and deep learning for user compatibility.

Node.js, MongoDB, Discord.js, OpenAI API, Notion API

Advanced Discord bot for esports association management. Features Notion DB synchronization, AI-powered scheduling, ticketing system, and automated planning using OpenAI functions API.

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Technical Skills

Comprehensive expertise in web development, from frontend design to backend architecture and AI integration.

Frontend Development

Next.js
React
TypeScript
Tailwind CSS
Mobile-First Design
Responsive Design
PWA Development
UI/UX Design
Service Workers

Backend Development

PostgreSQL
Adonis.js
Redis
MongoDB
API Design
Performance Optimization
Database Architecture

AI & Data

OpenAI Integration
AI Chatbots
Data Visualization
Data Analytics
Machine Learning
AI Streaming
Languages

Fluent in multiple languages, enabling effective communication with clients and teams worldwide.

franceFrench

Native

united statesEnglish

Fluent

germanyGerman

Notions
Profile

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© 2025 Leonard Roussard. All rights reserved.