I reply in under 24 h · Booking for November

Custom software for your business, with a fixed price before we start.

I'm Arkadii, a software engineer based between Valencia and Alicante. I build websites, apps and automations for companies of any size, from a small tool to a full platform. You always talk to me, from the first call to support.

For academies and training companies, shops and local businesses, agencies, property managers, early-stage startups

  • No lock-in
  • You own the code
  • Spanish invoice
Arkadii Zon, software engineer, smiling in a half-length portrait
Arkadii ZonFull-stack engineer · Valencia – Alicante
Your codefrom day one
< 24 hto reply to your brief
Fixed pricein writing, before we start
ES · RU · ENyou talk to the person who codes
How I work

Four steps. No surprises on the invoice.

  1. 20-minute call

    You tell me what you do today and what's holding you back. I tell you whether building something makes sense.

    Free
  2. Fixed-price proposal

    In writing: what's included, what isn't, what it costs and when you get it. That price doesn't change.

    Within 2 working days
  3. Weekly deliveries

    Every week you see real progress on a test link. You try it, comment, and we adjust.

    Demo every Friday
  4. Support afterwards

    I don't disappear after delivery. Monthly maintenance plan or hourly support, your choice.

    From €105/month
Pricing

Public prices. From day one.

Every project is agreed at a fixed price. These are the starting points; larger projects are quoted individually.

Website or landing page

from €1,050 excl. VAT
  • Custom design, not a template
  • Optimised for Google and mobile
  • Form connected to your email or CRM
2–4 weeks Get a quote
Most requested

Internal tool or automation

from €1,750 excl. VAT
  • Analysis of your current process
  • Integration with your tools (Excel, ERP, email)
  • Training for your team
3–6 weeks Get a quote

Startup MVP

from €5,600 excl. VAT
  • Minimal scope designed with you
  • In production, with real users
  • Clean code so your team can grow it
6–10 weeks Get a quote

Monthly maintenance

Updates, backups, monitoring and 4 h of changes per month.

€105/month

Not sure what you need?

Tell me the problem. I'll suggest the simplest option that solves it.

Tell me
FAQ

What people usually ask me

Another question? Ask me through the form.

How much does custom software cost?
It depends on what it has to do. A simple internal tool starts at €1,750; an MVP at €5,600. After the first call I give you a fixed price in writing.
What does “fixed price” mean?
The price in the proposal is the price you pay. If something takes me longer than planned, that is on me. It only changes if you decide to add new features, and I always quote them first.
What if I need changes after delivery?
You get 60 days of warranty to fix bugs at no cost. After that you can take monthly maintenance or ask for one-off changes by the hour.
You work alone. What happens if one day you are not around?
The code and the accounts are yours from day one, in your own account. I leave it documented so any other developer can pick it up.
How long does it take?
A website, 2–4 weeks. An internal tool, 3–6 weeks. Every week you see progress on a test link.
Do you work outside Valencia and Alicante?
Yes, remotely with companies all over Spain. If you are in the Valencian Community we can meet in person.
Get a quote