Jan Brtka

Full-Stack Engineer | Team Lead | Systems Architect

12+ years shipping production systems across law enforcement, automotive, IoT, and fintech. From speed-enforcement radar in 70+ police vehicles to industrial IoT platforms on factory floors to edge computing with custom hardware — I deliver end to end, from architecture and documentation through to deployment. 100+ vehicles in the field, 5 countries, 8 assembly lines.

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What I Do

Full-Stack Dev

Node.js, Go, TypeScript, React, Web Components — end-to-end from database to UI, backend to edge.

IoT & Hardware

RFID, Smart Cards, sensors, cameras, Raspberry Pi, LoRaWAN — bridging software with the physical world.

DevOps & Infra

Docker, Kubernetes, Linux, Ansible, AWS/Azure — automating deployments, OS hardening, and edge computing.

Selected Projects

NEV — National Vehicle Registry Modernization

Slovak Republic · 2024–Present · Team Lead

Modernizing the national vehicle registry (Národná Evidencia Vozidiel) serving 100+ vehicles — migrating the existing platform into MOSY, a custom framework developed at Soitron. Developing multiple backend and frontend modules, designing ActiveMQ integrations, and managing the transition while preserving full operational continuity of the live system.

Node.js ActiveMQ Web Components PostgreSQL

CABOT — Industrial IoT Sample Tracking

CABOT Global · 2024–Present · Lead Developer & Architect

Enterprise IoT platform for automated sample collection tracking across CABOT manufacturing facilities worldwide. Designed and built the entire platform as a Go microservices architecture communicating over NATS JetStream. Developed edge services for Raspberry Pi devices — RFID readers, LED controllers, label printers, lab processing nodes. Implemented offline-first edge computing with NATS leaf nodes, certificate-based device authentication, and multi-tenant isolation.

Go NATS/JetStream Raspberry Pi Azure TLS/mTLS

Neuromart — Smartwatch Health Monitoring

15 Ambulance Units · 2023–2024

Remote patient monitoring solution using smartwatches to track health vitals of Alzheimer patients across 15 ambulance units, serving hundreds of patients. Built the data ingestion and alerting backend in Node.js integrated with ThingsBoard IoT platform, developed the caregiver dashboard in React with real-time alerts, and configured NB-IoT and LoRaWAN connectivity.

Node.js React ThingsBoard NB-IoT LoRaWAN

VASCAR Radar — Czech Police Highway Enforcement

Czech Republic · 2021–2023 · Lead Developer

Speed enforcement system deployed in 70+ BMW police vehicles on Czech highways — single-handedly delivered ~85% of the entire system. Built the Node.js radar service with C/C++ addons for hardware integration, Android officer interface with RFID readers, and back-office web application for fine processing and image analysis. Led hardware research, OS security hardening, metrology certification at SMU, and continued into the v2 next-generation platform.

Node.js C/C++ Java OpenCV Linux Capacitor

VW Bratislava — Assembly Line Monitoring

Volkswagen Bratislava · 2021 · Team Lead

Early-warning system for workstation overheating issues across 8 assembly lines. Designed the sensor data collection architecture, researched and integrated industrial hardware — microprocessors, IR sensors, cameras, power management. Led a team of 4 developers and produced complete project documentation to Volkswagen enterprise standards.

Node.js Redis MQTT IoT

Slovak Police Fleet — Schengen & Interpol Integration

Slovak Republic · 2018–2020

Modernized the national police fleet system, expanding Schengen and Interpol database access from vehicles and persons to weapons, shipping containers, and aircraft. Built the complete interface for in-vehicle terminals and ruggedized handheld devices, including SmartCard authentication and SOAP backend integration.

Node.js Java PostgreSQL ElasticSearch Web Components

Expertise

Languages & Runtime JavaScript, TypeScript, Node.js, Go, Java, C/C++, Python, PHP
Frontend Web Components, React, VueJS, SolidJS, Capacitor, Cordova, NwJS
Data & Backend PostgreSQL, Redis, ElasticSearch, NATS/JetStream, MQTT, GraphQL, ActiveMQ
Infrastructure Linux, Docker, AWS, Azure, Ansible, Grafana, ThingsBoard
Hardware & IoT Raspberry Pi, RFID/NFC, Smart Cards, MRZ readers, LoRaWAN, NB-IoT, industrial sensors
Computer Vision & ML OpenCV, TensorFlow, ALPR, object detection & tracking

Let's Work Together

Available for senior engineering, team lead, or architect roles — remote or on-site.

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