LothaireEpee

Full Stack Developer

FrançaisEnglish
Based inParis - Berlin
lothaire.epee@gmail.comOpenMail client opened

A full-stack developer with 5+ years of experience building web applications and digital products

Lothaire Epee's portrait

I have contributed to the development of SaaS platforms in the renewable energy sector, as well as to a large-scale survey management system as part of a European open-source project. These experiences allowed me to work with React, TypeScript, Django and Python on data-driven applications and complex systems used in real-world contexts.

In addition, I have built responsive commercial websites and e-commerce solutions for private clients, adapting to specific needs and delivering practical, user-oriented results.

My focus is on writing clean, well-tested code and following industry best practices. I keep learning and enjoy solving technical challenges. My goal is to improve the product and to deliver a better experience for both clients and end users.

Throughout my career, I have maintained a consistent direction, aiming to contribute to meaningful projects

Skills and Expertise

A frontend and backend toolkit centered on React, TypeScript, Node.js and Django to build clear interfaces and reliable web applications.

Stack

Frontend

  • React
  • Next.js
  • Angular
  • TypeScript
  • JavaScript
  • Tailwind CSS
  • Material-UI
  • Shadcn/ui
  • HTML5
  • CSS3 / SCSS
  • Framer Motion

Backend

  • Node.js
  • Django
  • Express
  • NestJS
  • REST API
  • GraphQL
  • PostgreSQL
  • MongoDB
  • Drizzle
  • Firebase

Languages

  • TypeScript
  • JavaScript
  • Python
  • SQL
  • Bash

Tools

  • Git
  • GitHub / Gitlab
  • Vite
  • Figma
  • Postman
  • Docker
  • Vercel
  • Netlify
  • Notion

Expertise

  • SOLID principles, design patterns, modular & maintainable design
  • Enterprise and Software as a Service (SaaS) web application development
  • RESTful API Design & Secure Services
  • Relational Databases, SQL & ORM Patterns
  • Asynchronous Programming & Performance Optimization
  • Cloud Services Integration
  • Authentication & Authorization (OAuth, JWT)
  • Role-Based Access Control (RBAC)
  • Agile / SCRUM & Collaborative Development
  • AI integration & AI-driven features (LLMs, automation)
  • Unit & end-to-end testing

Experience and career path

Sept. 2025 — Today

Freelance Developer

Delivered custom web solutions for business and product websites, including product launches and online sales. Built responsive interfaces with JavaScript, TypeScript and Node.js, focusing on performance, accessibility and elegant design.

  • Creating elegant landing pages and design systems
  • Built reusable UI components
  • Integration of selling/transaction interfaces
  • Integration of responsive pages from Figma
  • Improving accessibility and performance
  • Working closely with clients
  • Implementation of animations and transitions
  • Collaboration with art direction teams

Stack

  • Javascript
  • Typescript
  • Node.js
  • Shopify
  • Tailwind
  • E-Commerce
  • WordPress

Jan. 2024 — Jul. 2025

Full-Stack Developer

Lumenaza GmbH

Berlin, Germany

Designed and developed API-driven SaaS applications and microservices for the renewable energy sector, using React, TypeScript, Django and Python.

  • Built reusable UI components
  • Product configuration for B2B partners
  • Dynamic pricing, and customer self-service portals with role-based access control (RBAC, OAuth, JWT)
  • Enabling real-time pricing and consumption monitoring
  • Multi-step contract onboarding flow and their management for both producers and consumers.
  • Worked closely with designer and product owner
  • Use of AI tools to support code development and documentation.

Stack

  • React
  • Django
  • TypeScript
  • Python
  • Redux
  • Git
  • Docker
  • JWT
  • Selenium
  • Linux

Sept. 2021 — Sept. 2023

Developer Conceptor

Centre de Données Socio-Politiques - Science Po

Paris, France

Maintained and developed features for the Web Panel Sample Service (WPSS), a Django and Python application used to manage large-scale samples of more than 13,000 panelists and surveys across Europe.

  • Enabling secure role-based access for both social scientist and panelists
  • Providing multilingual interfaces to conduct surveys throughout 13 European countries
  • Ensured data integrity and their regulatory compliance (GDPR)
  • Automatization of invitation sendings and follow-up messages (emails, SMS)
  • Maintained component libraries
  • Tracking of message delivery, failures detection, and response rates monitoring.
  • Ensure operational stability through ORM-based data management and CI-supported production workflows
  • Use of AI tools to support code development and documentation.

Stack

  • Django
  • Python
  • Git
  • Docker
  • Linux
  • Javascript
  • HTML
  • CSS

Selected projects

VisitGithub

2026

De Nouveau

Product Design / Full Stack Development / CMS Architecture / Deployment

Portfolio website for an architecture studio, built around project showcases, a headless CMS, and an efficient media management system.

Designed and developed a premium portfolio website for an architecture studio, featuring a minimalist editorial aesthetic focused on showcasing architectural projects.

Implemented a headless CMS using Payload CMS, enabling the client to manage pages, projects, categories, images, videos, and SEO metadata through a dedicated administration interface.

Built a full-stack architecture using Next.js, PostgreSQL via Neon, Cloudflare R2 media storage through an S3-compatible setup, Vercel deployment, and automatic cache revalidation after content updates.

Created reusable project layouts — default, editorial, gallery focused, and minimal — allowing each project to be presented according to its visual or narrative requirements.

Configured a CI workflow with GitHub Actions to automatically run linting, formatting checks, tests, and production builds before deployment.

The resulting editorial workflow gives the studio direct control over its content and media while keeping each project presentation consistent.

Stack

  • Next.js
  • React
  • TypeScript
  • Tailwind CSS
  • Payload CMS
  • PostgreSQL
  • Neon
  • Cloudflare R2
  • S3 Storage
  • Vercel
  • Vitest
  • GitHub Actions
  • ESLint
  • Prettier

2026

Reusable Executive Portfolio SPA

Design / Frontend Development & Integration

Reusable React and TypeScript CV portfolio for an executive in a car insurance company.

Designed a reusable Single Page Application for integration into an existing client application, while respecting its technical stack and integration constraints.

The objective was to build a content-driven portfolio without hardcoded data, combining a minimalist editorial design, smooth animations, a responsive layout, and light and dark themes.

Implemented the portfolio with React, TypeScript and React Router, including client-side routes and a dedicated 404 page.

The result is a reusable component whose content and presentation can be adapted to different executive profiles without rebuilding the interface.

Stack

  • React
  • Tailwind
  • React Router
  • TypeScript
  • shadcn/ui
  • Framer Motion
  • Lucide React
  • next-themes
  • CSS
Visit

2025

Ribelmais Buch

Design / Frontend & CMS Development

WordPress and Shopify e-commerce website dedicated to the publication, launch, and online sale of a book.

Design and development of a website for a Swiss client to coincide with the launch of their book, including Shopify integration for online management and sales.

The goal was to build a precise e-commerce website with the minimalist design requested by the client.

Combined WordPress for editorial content with Shopify for product and order management, resulting in a clear path from discovering the book to purchasing it online.

Stack

  • JavaScript
  • WordPress
  • Shopify
  • E-Commerce
© 2026 Lothaire