I am Matyáš Janoš from Prague, a Cyber Security Engineer by profession. I design, build and run websites and online shops, help businesses secure their websites, networks and servers, and develop ESP32-based IoT devices from prototype to firmware. Websites for one-off events can be done at short notice.
sites --live
4 websites · hosting, backups and monitoring on my infrastructure
Each one was made for a specific client, from the first design to launch. All of them run on my infrastructure, where I take care of hosting, updates, backups and monitoring.
The website for the 19th edition of a champagne festival in three languages. A programme of tastings and dinners, the champagne houses, and an opening animation in which a bottle opens as you scroll.
The website and online shop of a Prague chocolaterie with a café. Collections of handmade pralines, corporate gifts, workshop and café table bookings, and a custom admin where the team runs the whole shop.
A one-page website for a summer champagne soirée at Žofín in Prague. Video from last year’s event right at the top, the programme, practical information and bookings confirmed by email, in Czech and English.
A new website for an agency that arranges private evening tours of the Klementinum, Prague Castle or the Hofburg in Vienna, corporate events and marriage proposals. The design is built around the atmosphere of the evening, when the landmarks belong only to the guests.
Three areas that belong together. A website often needs data from devices, and both have to run securely.
Websites, online shops and web apps for sole traders and small to mid-sized businesses. Designed for your business, not assembled from a template. Fast, accessible and easy to update. And when the deadline is tight, I will build a website for a one-off event or an e-invitation at short notice.
Devices that measure, control and send data. From a prototype on the desk to a device deployed in the field, including firmware and the connection to the web.
IoT and hardware developmentGrowBuddyEthernet-to-WiFi bridge
Websites and systems do not end at launch. I look after servers, backups and updates. From my work in banking, at EY and at a systems integrator, I know where small businesses most often get security wrong, and I will help you fix it.
Cyber security for businessesWebsite hosting, care and security
I work as a Cyber Security Engineer. Over four years I have worked in banking, consulting at EY and at a systems integrator. Alongside that, I build websites, mainly for sole traders and small to mid-sized businesses, and IoT devices. That is why security is never an afterthought.
I implement security solutions for customers from design to hand-over: log management and SIEM, DLP, firewalls and XDR/EDR. I help design security processes, launch audits under the new Czech Cyber Security Act and deliver the company’s first identity management implementations.
ISO/IEC 27001 audits and compliance audits against the Czech Cyber Security Act, advice on adopting new security technologies and basic penetration tests.
Reviewed and approved security requests, mainly firewall rule changes, configured security solutions and took part in security incident analysis.
Operational tasks for the internal IT department.
Where I try out new technology before I use it for clients.
A platform for monitoring the growing environment in greenhouses and grow rooms. ESP32 sensors measure air temperature, humidity and soil moisture and switch pumps, fans or lights according to rules.
ESP32-C3, FastAPI, TimescaleDB, React
A pocket ESP32 box that puts ethernet-only devices on WiFi. Cameras, PLCs, printers or lab instruments join the network in a minute and stay under control.
ESP32, C, ESP-IDF, lwIP
Infrastructure across three sites where I try out what I later deploy for customers. This website runs on it too.
Proxmox VE, UniFi Cloud Gateway Ultra, WireGuard, Ansible, Wazuh, Grafana
A pocket light meter for film photography. It measures the light falling on the scene and, based on the aperture, shutter speed and film speed, calculates the correct exposure for a specific camera.
ESP32-C3, C++, VEML7700, KiCad
A website usually goes live four to eight weeks after your first message. If you are in a hurry, it can be much faster.
We talk about what you need, who the website is for and what it should do. You get an estimate of price and timeline.
I prepare the structure and visual design. Before I write any code, you can see what the website will look like.
I build the website on a staging URL, so you can give feedback at any time.
I deploy the website to production and, if agreed, keep looking after hosting, updates and backups.
Mainly for sole traders and small to mid-sized businesses that need more than a template and want a website they do not have to worry about. I also build websites for one-off events, such as festivals, corporate events or e-invitations.
It depends on the scope, features and number of languages. After a short call I will send you an estimate of price and timeline.
A typical website takes four to eight weeks from your first message to launch.
Custom websitesYes, that is my strength. Depending on the brief, I will build an event website, an e-invitation or a programme page within a few days, simpler ones even at short notice.
Event websites at short noticeYes. I provide hosting, updates, backups and uptime monitoring on my own infrastructure.
Website hosting and careYes. I am a Cyber Security Engineer by profession, so besides websites I also secure networks and servers: firewall and network segmentation, backups, monitoring and audits against ISO/IEC 27001 and the Czech Cyber Security Act.
Cyber security for businessesYes. I design ESP32-based devices from prototype to firmware, including sensors, control, web integration and dashboards. GrowBuddy and the Ethernet-to-WiFi bridge are examples.
IoT and hardware developmentYes. I am based in Prague, but most things can be handled online, so location does not matter. I am happy to work in English.
A few sentences about what you need are enough. I will get back to you within two working days and suggest the next steps.
Thank you, your message has arrived.
I will reply within two working days to the email you entered.
