Ing. Patrik Krajňák

I build custom software and AI agents for businesses.

I'm Patrik and I run a small software company in Košice, Slovakia. I work on my own, so you always talk to me directly. I build internal systems, CRMs and ERPs, process automation, AI agents and UX-focused websites, so your team stops doing by hand what a system can do. For more than five years I've been building software that companies actually run on.

The consultation and prototype are free

Who I am and how I work

Ing. Patrik Krajňák, Full-stack developer, Košice
01 What I do

Software, automation and websites that actually save businesses time.

01

Custom software

ERPs, CRMs, internal systems, web and mobile apps for companies that have outgrown Excel or an off-the-shelf tool. I build the system around how your company really works and connect it to the software you already use.

  • Custom ERP: warehouse, production and attendance
  • Custom CRM with a client portal
  • Booking system connected to your calendar
  • Moving off Excel, Access or a legacy system
  • Web and mobile apps
  • UI/UX design and clickable prototypes
Custom software development
02

Automation and integrations

Invoicing, receipts, inquiries, orders and morning reports: a system takes over the repetitive work that costs you hours every week. I connect your website, online store, CRM, warehouse and accounting software so nobody has to retype data by hand.

  • Invoicing automation and Slovak e-invoicing from 2027
  • Extracting data from invoices and receipts into Pohoda, Money and KROS
  • Connecting your website, CRM, warehouse and accounting
  • Contracts, quotes and other documents from templates
  • Automations in n8n, Make or Zapier
  • Automation for accounting and tax firms
Business process automation
03

AI agents and a knowledge assistant

I can take the work someone on your team does every morning and hand it over to an AI agent. I build it to know when to act on its own and when to flag something for you. A knowledge assistant answers questions from your contracts, procedures and meeting notes, and shows the source with every answer.

  • Processing emails, orders and forms
  • Morning reports waiting in your inbox
  • Knowledge base built from your company documents
  • An AI chatbot on your website that answers customers
AI agents for business
04

Websites and UX design

I've enjoyed building websites since secondary school, and at TUKE both my bachelor's and master's theses focused on UI and UX. I redesign websites so people find their way around straight away, pages load fast and both Google and ChatGPT can find them. My own site scores 100 for accessibility and SEO in Lighthouse.

  • Redesigns and new company websites
  • UX audit and clickable prototype
  • Site speed and accessibility under the EAA
  • SEO and GEO audit for Google and AI search
  • Bookings and forms connected to your CRM
Website redesign
05

AI training and consulting

A tool nobody uses is just another invoice. I set AI up for your team's real tasks, train people to work with it and write down the rules for what it may and may not do. I've also taught web development and UI/UX at a vocational IT school in Košice. A 4-hour training session starts at €600.

  • Process audit to find what's worth automating
  • AI training for employees on their real tasks
  • Rules for what AI is and isn't allowed to do
AI training for teams
06

Audits and security

I check your website, company accounts and code, and you get a list of what to fix, ordered by what puts you at the most risk. I also look at which software and subscriptions you pay for without needing them. A security audit starts at €410.

  • Security audit of your website or app
  • Company accounts in Microsoft 365 and Google Workspace
  • Code and dependency audit for known vulnerabilities
  • Software and subscription cost audit

Introductory offer

A free prototype, before you decide.

The consultation is free. After it, you get a quote split into parts, each with a specific price and timeline. If you accept the quote or some of its parts, I build a free prototype on a sample of your data. Not a template or a demo, but something built around your process that lets you check it will work. Only then do you make your final decision. You pay 20% when you order and the rest after handover.

People promise a lot in this field. I'd rather show you. I take on two clients a month.

I'd like a consultationNo commitment to start
03 How I work

Three simple steps. That's all it takes.

  1. 01Free

    Consultation

    Online, in person or by phone, 30 to 60 minutes

    We look at what's actually slowing you down and where most of your time goes. You walk away knowing whether it's worth building, even if we don't go any further.

  2. 02Free prototype

    Quote and prototype

    Once you accept the quote

    You get a quote split into parts, each with a specific price and timeline. If you accept the quote or some of its parts, I build a free prototype on a sample of your data, so you can check that it will work before you make your final decision.

  3. 03Paid phase

    Deployment

    Six to twelve weeks

    You pay 20% when you order and the rest after handover. I hand the system over with documentation and training, and I always fix bugs in it for free.

04 Calculator

What does work a system could do cost you?

Pick one task that keeps coming back, such as retyping documents, matching payments or putting reports together. The result is an estimate; we work out the real number in the consultation.

2
6 h
€15
50 %

Estimate

26

hours a month

€4,680

a year for work a system could do

That is 3.3 working days every month.

Projects start at around €500; I price larger systems in parts. Once you accept the quote, I build the prototype for free.

Talk it through in a consultation
05 FAQ

The questions I get most often.

Are you a company or a freelancer?

Both. I'm a registered sole trader in Slovakia (company ID 57959714), so like any other company I invoice you and we sign a contract, including a data processing agreement. I work on my own. I'm responsible for the system I build and always fix its bugs for free. Compared with an agency, you talk to me the whole time, not to a project manager.

Do you build regular custom software, or only AI?

Yes, most of what I build is regular software: internal systems, a custom CRM, invoicing automation and integrations between programs that don't talk to each other yet. I add AI where something has to read texts and attachments. You'll find examples from practice on the custom software development page.

What is an AI agent and how is it different from a chatbot?

A chatbot answers questions. An AI agent takes a task and sees it through: it reads emails and attachments, pulls out the data, enters it into your system and asks a person when it isn't sure. ChatGPT is a general-purpose chat tool, while I build each AI agent for one specific process in your company.

How much does custom software or an AI agent cost?

The consultation is free. Projects start at around €500: that's what a single automation, an integration or a smaller tool costs, a few days of work. A larger system your company runs on every day takes months, and I split the quote into parts so you don't have to order everything at once. Running costs for hosting and AI are usually tens to low hundreds of euros a month. After the first call you get a specific price and delivery date instead of a range. You pay 20% when you order and the rest after handover; the full terms of cooperation are on my About page.

How long do development and deployment take?

After the consultation, you get a quote with a specific price and delivery date. A single automation takes a few days, and a system your company runs on every day usually takes six to twelve weeks. What affects the timeline most is how many of your systems need to be connected.

Do I need to understand the technical side of AI?

No. My job is to understand how your company works and turn that into a system. You explain the process, I take care of the code. If I need to know something, I'll ask you a specific question.

Is our company data safe with AI, and what about GDPR?

Yes, if the system is built properly. We agree in advance which data the AI can access, and I call the language models through their business APIs, whose data the providers don't use for training by default under their own terms. If the system processes personal data on my accounts, we sign a data processing agreement under Article 28 GDPR. Details and sources are on the internal knowledge assistant page.

Can AI connect to the systems we already use?

Usually, yes. An agent can connect to your email, CRM, accounting software, online store or shared spreadsheets through their APIs. If a system has no API, we can work with exports or directly with the database. Whether and how your particular system connects is something we'll find out in the first consultation.

Do you offer AI training for employees?

Yes, and I'd say it's half the battle. A tool nobody uses is just another invoice. I run AI training on your team's real tasks instead of generic examples, and I leave you with internal procedures and rules for what AI is and isn't allowed to do. You can also book the training on its own, without me building anything for you. A 4-hour session starts at €600. On top of that, the EU AI Act requires companies that use AI to support AI literacy among the people who work with it, and training on your own tasks is one of the measures you can take and document.

What if the AI agent makes a mistake?

I plan for that at the design stage. Every agent has limits it can't cross, and everything it does is logged and traceable. For steps where a mistake would cost money, it waits for a person to sign off. I prefer a more deterministic approach with clear guardrails.

Do you work with freelancers and small businesses?

Yes, if there's a real business behind it. A solo entrepreneur with a well-thought-out process often gets more out of an agent than a company of thirty people, because the decision gets made in one evening.

Where does the system run, and who looks after it?

By default I run it on my own accounts for a monthly fee, so you don't have to worry about hosting, backups and updates. If you want it on your own accounts, we can arrange the move. I always fix bugs in systems I've built for free, and I'm happy to stay on long term if you want to keep extending it.

Contact

Tell me what you still do by hand.

A few lines about the process that slows you down or the system you need are enough. Within eight hours I'll get back to you on whether and how it can be built, and if it makes sense, we'll set up a short call.

Prefer email or phone?

patrik.krajnak.dev@gmail.com +421 950 625 466

I reply within 8 hours. Based in Košice, Slovakia (CET), working remotely

Calls on Google Meet: Monday to Thursday 7:00 to 20:00, Friday until 18:00. Weekends by arrangement.

Or email me directly at patrik.krajnak.dev@gmail.com.

I use your details only to reply and to arrange the call. Privacy policy