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Custom Development
When nothing off the shelf fits, an application built to last
Sometimes no off-the-shelf software fits the way you work. You juggle three tools, Excel files and a lot of copy-paste. Or an old internal app is stuck, and nobody dares touch it.
I build what you need: an internal app, a customer portal, an API that connects your systems, or taking over an old project. Python and Django at the core, React for the screens, Docker and Kubernetes to keep it all running.
I work with Claude AI to move faster, but I design it and I make the calls. Every line is reviewed, tested and documented. It's also the solid base behind my automations and integrations.
The result: a fast, stable application you can grow without technical debt that costs you later. 20 years of experience behind every project.
// Approach
How I work
For a custom application, the written plan matters even more: we agree on what ships first, then the application grows in stages.
- 01
Let's book a quick chat
20 minutes to talk about your project, your goals and your constraints. No commitment, and nothing to prepare.
- 02
A written plan and estimate
You get a written plan and estimate. You know what will be done, in what order and at what price, before I start.
- 03
Delivery in stages
The project moves forward in small stages, with regular demos. You validate along the way, and we adjust as needed.
- 04
Built with AI, reviewed by me
I work with Claude AI to move faster. I review and test every stage myself before it reaches you.
// How I help
What I build
When no off-the-shelf software fits the way you work.
Web applications and APIs
An internal app, a customer portal or a custom API, in Python and Django.
Screens that are easy to use
Web and mobile interfaces in React, designed for the people who use them every day.
Your systems connected
An API that links your software, so information flows without copy and paste.
Taking over an old project
An internal app nobody dares to touch: I take it over, document it and modernize it in stages.
Infrastructure and DevOps
Docker, Kubernetes and the cloud to keep everything running smoothly.
Tested and documented
Automated tests, continuous integration and documentation: every line is reviewed, including the ones written with AI.
// Project types
Examples of projects
Local small businesses that have outgrown Excel files and workarounds.
- 01
A customer portal
Your customers track their orders, documents or requests online, without having to call you.
- 02
An internal management app
Quotes, schedules or inventory in a single tool, instead of three apps and a few Excel files.
- 03
An API that links your systems
Your site, your CRM and your accounting talking to each other: one entry instead of three.
- 04
Modernizing an old application
An aging internal app taken over, documented and updated, without rewriting everything at once.
- 05
A solid production setup
An existing application moved into Docker and deployed reproducibly, with tests on every change.
Examples to give you an idea. Your project starts from your own situation.
// Pricing
The price, before we start
No surprises: you know the price before I start the work.
$120 an hour
or a fixed price, on a written estimate
Fixed price
For a well-defined project: a set price for the work described in the written plan. You know exactly what you're paying for.
Hourly
For a project that evolves, adjustments or ongoing support: you pay for the time spent, based on an estimate agreed upfront.
- A written estimate before we start, always
- The first 20-minute call is free, no commitment
- We pick the option that fits your project together
What affects the price
The size of the application. A well-defined project can be done at a fixed price, stage by stage; ongoing development and support are usually hourly.
// Technologies
The technologies I use
Proven, widely used technologies: your application stays easy to take over, by me or someone else.
- Python
The heart of my applications: clear, solid and widely used.
- Django
The Python framework for web applications and their admin screens.
- FastAPI
For fast, well-documented APIs.
- PostgreSQL
The reliable database behind most of my projects.
- React
For lively web and mobile interfaces that are easy to use.
- Next.js
For fast sites and portals, built on React.
- Docker
Every application runs in the same environment, from my machine to production.
- Kubernetes
To run and scale larger applications.
// FAQ
Frequently asked questions
Why custom software instead of something off the shelf?
If off-the-shelf software works for you, I'll tell you. Custom is worth it when the way you work doesn't fit any box, or when several systems need to be connected.
Can you take over an existing application?
Yes. I read it, document it and modernize it in stages, without rewriting everything at once.
Does AI write the code for you?
I work with Claude AI to move faster, but I design and make the calls. Every line is reviewed, tested and documented.
// No commitment
Interested in this service?
Tell me what you want to simplify: a 20-minute chat, no commitment.