Custom web application & software development

A tool built around the way you work: web app, SaaS, business software or automation that saves you hours every week. From scoping to production.

Who it's for
Startups launching a product, small businesses replacing a spreadsheet or a manual process, companies that need their tools to talk to each other.
Area
All of France and abroad, remotely, or on site in the Paris region
Quote
Free, within 24h, no commitment
Request a free quote

What's included

  • Requirements scoping and screen design before development
  • Full-stack web app: React / Next.js interface, API, database
  • User accounts, roles and admin area
  • Third-party API integration and automated data collection
  • Desktop software with Electron when needed
  • Production launch, hosting and maintenance

From business need to live product

Every project starts with understanding your business: what wastes your time, what your customers expect, what should be automated. I then design an application that's simple to use, on a solid architecture that can grow.

I work across the whole stack: React and Next.js interfaces, Node.js APIs and servers, Python data processing, MongoDB or SQL databases, and C++ modules when performance is critical.

Real projects

Pool Nexus, Nexus System's connected box, brings together ESP32 firmware, microservices, five web apps and a mobile app. DentalCheck, my price comparison tool for dental practices, collects six supplier catalogues every day and matches over 61,000 references. ISIAudit, a Windows application, audits large volumes of files to check their compliance.

How your project runs

  1. 01 · ConversationA call or video meeting to understand your business, goals and constraints.
  2. 02 · Free quoteA detailed proposal within 24h: scope, schedule and price, with no commitment.
  3. 03 · DesignMockups of the main screens, approved with you before any development.
  4. 04 · DevelopmentShort iterations with regular demos so we can adjust along the way.
  5. 05 · Launch & follow-upDeployment, SEO, then maintenance and new features if you wish.

Related work

  • Pool Nexus →Nexus System's connected box that measures and regulates pool water on its own: two ESP32 boards, a microservices platform, five web apps and an iOS and Android mobile app.
  • DentalCheck →The dental supplies comparison tool: six supplier catalogues collected daily, over 61,000 matched references and a cart automatically split to the best price.
  • ISIAudit →Windows software that audits large volumes of files and checks their compliance with organization rules. Electron and React interface, C++ modules for fast analysis.

Frequently asked questions

Which technologies do you use?

Mainly React, Next.js and Node.js for the web, Python for data and automation, MongoDB or SQLite for storage, Electron for desktop software and C++ for heavy processing.

Can you build a complete SaaS?

Yes: sign-up, Stripe subscriptions, user roles, admin area, transactional emails and hosting. That's exactly what I built with DentalCheck.

How does a project run?

A conversation to understand the need, a detailed quote, screen design, then development in stages with regular demos until production launch.

Do you provide maintenance after launch?

Yes. I can handle maintenance, security updates and new features for your application over time.

My other services

  • Showcase website design →Custom showcase websites, fast and optimized for Google, for craftspeople, freelancers and small businesses. Freelance web developer based in Paris.
  • E-commerce website development →Custom online stores with secure Stripe payments, product catalogue and admin area. Freelance e-commerce developer based in Paris, working remotely.
  • SEO & web performance →Technical SEO audit and optimization: speed, Core Web Vitals, meta tags, structured data and local SEO. Freelance SEO consultant based in Paris.

Let's talk about your project

Tell me what you need: I'll reply within 24h with a first proposal.

Contact me