01Mar 2026 — Present
AI systems
Stream Circle
Leading the migration of a legacy AngularJS application to React while orchestrating AI agents to accelerate development and improve engineering efficiency.
React.js Software architect · Agent orchestrator · Slovakia
Building the
systems behind
better software.
I’m Kristian — a software developer with deep Node.js expertise. I orchestrate AI agents, shape resilient architectures, and review the details that make production software trustworthy.
↓CurrentlyFounder at ExtropyBased in Poprad, Slovakia
01 / Selected work
Systems, products & platforms
built with intent.
02Oct 2022 — Present
Product
Tweenly
Led the creation of a platform for creating, managing, and broadcasting real-time graphics for live television and video production.
React · MUI · NestJS · MongoDB · AWS03Jan 2023 — Present
Platform
UIS
Spearheading an event-driven platform that accelerates delivery of custom business solutions through reusable architecture and built-in integrations.
Payload CMS · PostgreSQL · AWS04Sep 2024 — Dec 2025
Platform
Modulario
Designed and implemented third-party integrations, connecting Modulario with external platforms and APIs for reliable data exchange.
Express.js · React · Tailwind · MongoDB · AWS05Oct 2022 — May 2023
Civic tech
Bratislava
Developed e-forms and city account features for the official website of Bratislava.
Next.js · Tailwind06Jan 2021 — Sep 2022
Product
Doby Hory
Led the development of a social network tailored for mountain enthusiasts.
React · ASP.NET Core · MongoDB07Jul 2018 — May 2022
Civic tech
CORA GEO Retec
Architected and developed a dynamic web framework utilizing React.js and ASP.NET Web API.
React · Kendo UI · ASP.NET · Oracle08Oct 2018 — Apr 2020
Product
Ditec Intranet
Developed a time tracking application to optimize workflow management and efficiency tracking for internal use.
React · MUI · ASP.NET02 / Point of view
The layer between
idea and execution.
While agents write the code, I focus on the architecture.
I believe great software is less about shipping more code and more about creating the conditions for the right code to emerge.
That means strong systems, clear constraints, and a critical eye for the edge cases. Today, I use AI as a force multiplier — not a shortcut.
Frontend
React · React Native · Next.js · Tailwind
Backend
Node.js · NestJS · Payload CMS · PostgreSQL · MongoDB
Tools
AWS · GitHub · Claude · Codex
03 / Experience
A decade of making
complex things clearer.
Founder
Empowering agents with the tools and guardrails to build production-ready systems.
Software Architect
Designed software architectures, provided technical leadership, and mentored development teams.
Full Stack Developer
Delivered high-quality full stack development services for a variety of clients.
Software Developer
Designed and developed e-government systems to improve public administration and citizen engagement.
Education
Slovak University of Technology in Bratislava
Engineer’s Degree in Applied Informatics · 2013 — 2018