Senior Backend Developer / Architect
For more than 10 years, I have designed and built backend systems, mobile products, and cloud solutions. I understand the detail while making decisions for the whole.
How I can help
Need to build a backend, improve an existing system, or explore AI? I can help with both the design and the implementation.
I design and build backends for your product. From APIs and data models to integrations with external services and cloud deployment.
Java · Spring Boot · API · AWS · GCP
I help make sense of existing systems, identify weak points, and plan incremental improvements. I consider performance, maintainability, and what your team can realistically deliver.
System design · Technical audit · Refactoring
I explore where AI can be useful in your product. I build search prototypes and document assistants that answer questions with links to their sources.
Spring AI · RAG · Semantic search
Read the Lexio storyTell me what you are working on and where you want to go next.
01 / Profile
I do my best work where writing code is only part of the job. I want to understand the domain, find the right trade-off, and take the solution all the way to production.
02 / Career
From the first Android build to modernizing enterprise systems.
EXXETACurrent
I analyse legacy RPG code and transform it into maintainable Spring Boot services, covering domain design, integrations, data transformations, and architectural decisions.
EXXETA
Backend services, REST APIs, and system integrations for a BMW mobile product, including technical support for the Flutter application and close collaboration with the mobile team.
DONIT / FREELANCE
Products from the first design to production. Backend, mobile development, DevOps, team leadership, and technical decision-making for small companies and growing platforms.
QBSW, a.s.
Enterprise Java application development and delivery team coordination across the IIHF, Booyang, Lampiris, and DOCKitIN projects.
SIEMENS
Resolved critical issues in existing Android applications.
TOUCH4IT
Started as an intern and progressed into an Android developer role.
03 / Projects
Products that made it into the real world.
A property rental management platform covering the journey from listing to ongoing service.
An AI assistant for legal documents that answers from verifiable Slovak law context and helps locate relevant provisions.
An offline audiobook player for your own library, without ads or subscriptions.
An adopted and actively developed open-source Flutter package for country and locale data, ISO codes, calling codes, and search.
A fishing logbook with GPS tracking, maps, and analytics.
A distribution system for the healthcare sector.
An internal real estate system and mobile application for client-facing workflows.
A map-based social mobile application.
04 / Stack
Java · Spring Boot · REST API · Microservices · SQL
AWS · GCP · Docker · Kubernetes · CI/CD · Jenkins
PostgreSQL · MongoDB · Redis · Kafka · ElasticSearch
Flutter · Dart · GraphQL · Stripe · Strapi · GIS
05 / Education
Slovak University of Technology in Bratislava
Slovak University of Technology in Bratislava
06 / Achievements
07 / Contact