Radovan Kraus
Get in touch
CZ / EN
Senior PHP Backend Developer

I help companies build reliable software and integrate complex systems.

I specialize in backend development, web applications, and system integrations.

Get solution proposal Discuss your project
Focus
Backend Development
PHP, business logic, and maintainable architecture
APIs & Integrations
Payments, external systems, and data flows
Long-term Collaboration
Stable development for growing products
Who I help

Who I help

I bring the most value to companies that need stable software and long-term product development.

already have an application and want to improve it
need a stable backend or API
are dealing with system integrations
want a senior developer who understands business context
Services

Services

Web Application Development

I design and build custom web applications – from internal systems to customer portals.

Backend & API

I build robust backend systems and APIs designed for growth and stability.

System Integrations

I connect applications with external services – payments, CRM, ERP, APIs.

Integrations

Integrations & APIs

I have integrated a wide range of systems – from payments and financial services to government registries and hardware devices. I typically handle complex integrations where reliability, security, and correct data processing are critical.

Finance & crypto

  • Open Banking (PSD2) – Kontomatik
  • Kraken
  • CoinGecko
  • NRKI / BRKI

Payments & terminals

  • Worldline (payment terminals, ECR)
  • online payment gateways
  • EET

Government registries

  • RÚIAN (address registry)
  • ARES (company registry)

Hardware

  • LED panels
  • external devices
Additional experience
REST API, SOAP, XML / JSON · Ecomail · Cloudflare · reCAPTCHA
Examples of collaboration

How I typically help

Development of existing systems

I take over existing projects, understand them quickly, and help stabilize and improve them.

Backend and integrations

I design and implement backend logic, API communication, and integrations with external services.

Long-term technical partner

I help companies develop their products continuously instead of just delivering one-off fixes.

Cases

Selected Projects

A short selection of my recent work

Student Information System (SIS)

Collaboration on development and maintenance of a system for one of the largest universities in the Czech Republic (Charles University).

More details

Equipment inspection management system

Internal web application with notification system for managing inspections.

Internal system and client portal – Tommy Stachi

Worked on development of an internal system and client portal, including backend logic and integrations.

View project

School management system – Schoolpartner

Collaboration on development and improvement of a system for school administration and communication.

View project

Collaboration on external projects

Development and integrations for Solaris Media, BitcoinZmenaren and others.

About

About me

I help companies build stable backend systems, web applications, and integrations that make sense technically and from a business perspective.

PHP Nette Symfony MySQL Postgress Oracle REST API Docker Nextras Doctrine
What clients can expect
  • Clear and direct communication
  • Ownership of backend and integrations
  • Solutions that work long-term
  • Fast orientation in existing systems
Contact

Let’s discuss your project

Working on a new product, taking over an existing system, or planning an integration? Send me a message and I will suggest the next step.

koder@rkcomputer.cz