Custom application and system development

When custom development makes the most sense

Most problems can be solved with an off-the-shelf tool. Until you hit its limit. Your processes are unique, the packaged solution cannot handle them, customizing existing software is expensive, and your company is starting to hit the spreadsheet ceiling.

That is when I build custom software. Whether you need a smart internal system for employees, a B2B portal for partners, or a specialized application built around your unique know-how.

  • You have outgrown your existing tools or spreadsheets
  • The packaged solution forces you to change processes that already work
  • You are paying unreasonable license fees for every user
  • You need complete control over your data and security

What I design and build

I am not a code factory. I think about architecture. I build with modern cloud technologies and an API-first approach. The result is fast, secure, and easy to connect to anything else in the future.

I specialize in web applications, database systems, and data-heavy backends. If you also need artificial intelligence built into the application — for example, a private LLM over your data — I plan for that from the start.

  • Internal information systems (ERP and CRM modules)
  • Client areas and B2B ordering portals
  • Custom APIs and robust backends
  • Applications with integrated artificial intelligence (AI/RAG)

How the collaboration works

No two-hundred-page specifications that are outdated in a month. I start with a short workshop to map your real processes and identify the main priority.

I aim to deliver an MVP (Minimum Viable Product) as quickly as possible — a working foundation you can start using right away. Then I expand the system iteratively based on real feedback from your people.

  • Technical audit and architecture design
  • Fast delivery of a working foundation (MVP)
  • Agile development in short iterations
  • Thorough testing and clean code (ex-GitLab standards)

Results for your business

You get a tool that reflects exactly how your company makes money. You eliminate fees for expensive third-party licenses and gain a competitive advantage.

Most importantly, the software and data fully belong to you. There is no vendor lock-in. I write clean, documented code that any future development team can build on.

  • Software that belongs 100% to you (without vendor lock-in)
  • No user license fees
  • A system that grows and scales with your company

Do not let off-the-shelf software limit you

Let us discuss what is holding you back right now. I will assess whether custom development makes sense or recommend a simpler path.

Discuss my project
Jarka Košanová

Do you need an application built, rebuilt, or finished?

Tell me what you are building, where the project stands, and where you need to get. I will reply and we can schedule a short intro call.