01 About

Building things
that actually
ship.

Senior .NET engineer with 5+ years of focused C# development and a broader background spanning enterprise systems, industrial automation, and infrastructure operations. I design and deliver scalable Web APIs and microservices, work closely with SQL Server on query optimization and data architecture, and bring a hands-on approach to CI/CD, Docker, and cloud-connected solutions.

Currently leading the design of an AI-powered RAG system for internal documentation at Dôvera, while mentoring junior developers and driving code quality improvements across the team. I build things in my spare time too — personal lab projects and home automation setups that keep my curiosity sharp.

02 Experience
Jan 2025 — Present Dôvera zdravotná
poisťovňa, a.s. Košice, SK
Senior C# Developer
  • Conceived and built a RAG-based AI system from scratch for internal documentation — demo caught management attention immediately, leading to a greenlit funded follow-up project.
  • Took ownership of legacy MS SQL Server jobs nobody wanted to touch — profiled, rewrote, and optimized with measurable performance gains.
  • Architecting new backend APIs and services as the team's go-to person for design decisions and technical feasibility.
  • Mentoring a junior developer with daily code reviews and pair programming focused on building judgment, not just correcting code.
C# .NET 8MS SQL ServerEF CoreREST APIsReactGit
May 2023 — Dec 2024 Evolit Consulting GmbH Vienna, AT (remote)
C# Developer
  • Worked on mission-critical software for TÜV SÜD — predictive maintenance systems and monitoring of critical operational data where reliability is non-negotiable.
  • Built the 'Web Traffic Display' feature for real-time maritime data visualization combining backend API work with Angular frontend.
  • Delivered under real deadline pressure. Operated fully remote from day one with zero issues on communication or alignment across time zones.
  • Left the codebase measurably better through targeted refactoring — improved readability, reduced duplication, safer for future changes.
C# .NET 7/8AngularRabbitMQRedisHangfireMS SQLMongoDBAzure CI/CD
Jan 2021 — Jan 2023 Visma Labs s.r.o. Košice, SK
C# Developer
  • Core contributor to 'Unit Admin' — microservices pension investment platform for the Dutch market handling real user money and regulatory requirements at scale.
  • Designed service boundaries that reduced coupling, making the system easier to change without unexpected failures.
  • Built SpecFlow BDD acceptance tests that actually reflected business requirements and caught regressions before production.
C# .NET 7RedisHangfireMS SQLxUnitSpecFlowGitLab CI/CD
Jan 2005 — Dec 2020 BSH Bosch & Siemens
Home Appl. Group Michalovce, SK
Software Engineer — Industrial Automation
  • Built automated vibration and electrical measurement stations from scratch — rolled out across 40+ production lines and officially adopted as a BSH corporate standard.
  • Designed visual inspection systems using NI Vision for quality control on manufacturing lines.
  • Self-managed SQL Server environment and built internal web reporting tools with predictive indicators — acting as both developer and DBA for 15+ years.
C# .NET 4ASP.NETVBNI LabVIEWNI VisionMS SQL
Jan 2007 — Dec 2017 Self-employed Slovakia
Owner & Operator — Local ISP
  • Established and managed a local internet service provider, delivering reliable connectivity to residential and business clients.
  • Forged a customer-first mindset under real operational pressure; deep hands-on networking knowledge from setup to troubleshooting.
NetworkingTCP/IPInfrastructure
03 Education
Relevant Engineering Education
Software & Systems background — applied across 20+ years of professional practice
Software Engineering Systems Design Industrial Automation Applied Mathematics
Continuous Self-Directed Learning
Architecture patterns, distributed systems, AI/LLM integration & local model deployment
Distributed Systems Architecture Patterns AI / LLM Integration Ollama Qwen DeepSeek RAG Pipelines Vector Databases
04 Personal Projects & Lab
lab463.com — terminal
~/lab $ docker ps --all
lab463.com — Personal Lab & Portfolio
A publicly accessible home lab running real services on real infrastructure. Docker-based stack with HomeAssistant, Grafana + InfluxDB for sensor monitoring, Node-RED for automation logic. Tasmota-flashed devices, custom Arduino hardware, self-hosted and maintained by me alone. Where I experiment without consequences and learn things corporate environments don't teach.
DockerHomeAssistantGrafanaInfluxDBNode-REDTasmotaArduino
→ lab463.com
linkvault
~ $ pwa install
LinkVault
Personal link management built because browser bookmarks are broken. Works as PWA + Chrome Extension — installs like a native app. Built, deployed, and used daily. Solves a real problem and it ships.
PWAChrome ExtensionTypeScript
→ lab463.com/linkvault
vinnegpt
~ $ ollama run deepseek
VinneGPT
Self-hosted local AI chat running on own hardware via Ollama — before running local AI was mainstream. Understanding LLMs from the infrastructure up directly seeded the RAG work at Dôvera.
OllamaQwenDeepSeekRAG
→ lab463.com/vinnegpt
evaluation.sh — bash