Custom application development

1. 01 /Custom design
2. 02 /Turnkey delivery
3. 03 /AI integration when relevant
4. 04 /Testable & maintainable code
5. 05 /Project management: live tracking

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  TypeScript

  Static typing
• 

  PHP

  Server language
• 

  Python

  Scripts & AI
• 

  Go

  High-perf services
• 
  Next.js
  Full-stack web
• 
  PostgreSQL
  Relational data
• 

  Redis

  Cache & queues
• 

  Elastic

  Search & logs
• 
  Docker
  Containers
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  LangChain

  LLM orchestration

1. 01

   Scoping by field observation, not by assumption

2. 02

   Mockups and screen validation before the first line of code

3. 03

   Iterative development with regular demos: you see it progress

4. 04

   Delivery with user and technical documentation

A business application often touches domains that need a full-time specialist to be done properly. Rather than learning them at your expense, I go and find the profile — and you still deal with one person:

• Machine Learning & data experts
• Native iOS / Android developers
• Odoo (ERP) integrators
• HubSpot specialists (CRM & automation)

• How much does a custom application cost?

  The price comes from the scope: number of screens, business rules, role management, integrations, data migration. A custom business app starts from €2,000 for a simple MVP delivered in a few weeks, and from €10,000 for a complete solution. The amount is set in the quote, after a free initial scoping session that puts the scope in writing before any commitment.
• How do I know if I really need a custom app?

  If you're adapting your way of working to fit off-the-shelf software, if you're accumulating spreadsheets and plugins, or if your clients are asking for things your current tool can't do. It's usually the right moment. A free 30-minute audit helps decide objectively between custom, existing SaaS, or a combination.
• How long does it take to deliver an app?

  An MVP usable internally ships in 6 to 10 weeks. A complete application with polished UI, role management and integrations: 3 to 6 months depending on complexity. You see progress every week through regular demos, and you reorder priorities as we go.
• Will I own my data and source code?

  Yes. The source code belongs entirely to you, data is stored on infrastructure of your choice (your cloud, or hosting I manage), and everything is documented so any competent developer can take over. No proprietary service lock-in, no hidden license fees.
• What if my needs evolve after delivery?

  The application is built to evolve. Technical documentation lets any competent developer take over. I can continue maintenance and evolutions, or work with you occasionally when a new need comes up. You're never locked in.