I specialize in advancing the IT infrastructure of companies, transforming outdated systems into cutting-edge, market-leading technology solutions

My journey in IT began with a desire to improve the existing technologies and to create better, more efficient systems for both personal and professional use. Since 2009, I have been crafting custom solutions, leveraging my expertise in various programming languages. For every challenge, I carefully select the most appropriate language to ensure optimal performance and efficiency. I find fulfillment in developing software that not only addresses the needs of others but also makes their work processes smoother and more productive. To me, software development goes beyond programming. It starts with a deep understanding of the client’s needs and the specific problem that needs to be solved. Once the requirements are clear, I design a tailored solution and create a precise project scope. After implementation, I ensure the seamless operation and maintenance of the servers supporting the application. I am always looking for innovative ways to enhance workflows, and I take pride in providing thorough documentation to support long-term system success.

If you need to solve an IT problem or get some advice, do not hesitate to contact me.

If you need to program an application in the PHP framework Nette or Symfony, that runs on your own server, then you are my typical customer.

You can expect these advantages

I combine the theoretical foundation gained from my studies in Information Technology at ČVUT with extensive practical experience. I approach each challenge with a focus on uncovering its core issues, ensuring that I fully understand the problems at hand.

I take a personalized approach with each client, tailoring solutions and development strategies to achieve the best possible results.

The software I recommend is not only something I know well as a programmer, but also as a user. This dual perspective allows me to offer practical, well-rounded advice. For example, I use Linux on my personal desktop and run the same applications on my client servers. This hands-on experience enables me to provide detailed explanations of system functions, identify potential issues, and offer proactive solutions to mitigate them.

While I value direct, ongoing consultations, I am also accustomed to using electronic communication methods such as email, chat (WhatsApp), phone calls, VoIP, and video conferencing for effective and efficient collaboration.

Once I’ve gathered all necessary information and documentation, I work autonomously, saving you time and reducing the need for additional management. I am able to quickly familiarize myself with third-party source code, which allows me to add value immediately upon starting a project.

Writing thorough documentation is a standard part of my process. I believe that a project needs proper maintenance, and documentation is essential for the successful future implementation of any changes or requirements.

I prioritize security and approach it with a proactive mindset, ensuring that both customer and personal data are protected. For instance, I encrypt the disk on my laptop, and I address any security concerns promptly to mitigate potential risks.

If you're interested in collaborating, I can walk you through the process and outline how we can best work together to meet your objectives.

How to start cooperation and how I work.

References

Design and preparation of infrastructure for a new version of the information system. Transition from Windows to Linux. Data migration to the new information system to new servers. Technologies: Nginx+Docker+NoddeJS+MariaDB.
Takeover of the development of an information system built on the PHP framework Symfony. Implementation of advanced user rights. Overall management, implementation of new functions, technology upgrades and migration to new servers
Migration and troubleshooting of legacy systems built on PHP 5.6
Takeover development company's information and warehouse system of company MedPharma s.r.o..
Continued develop of eshop dobra-miska.cz.
Make connection to API with data of weather predictions and import it to application slunecno.cz.
Manage Servers and DevOps SW KLID.
Migration of servers and applications: Motonet s.r.o., TOP09 a Potvor.cz
Develop embedded devices with Linux using Yocto Project .
Research and Develop embedded IoT router for Rockwell Automation
Maintain firmware and develop 9300-ENA - industrial Linux router .
Warduino - platform for wireless communication . Warduino was awarded the prize in a magazine for the design of electronic journals PE-AR.
Wireless sensors network .
Weather station to estimate the thermals.
Wireless Real Time Temperature measurement for Android.
The Study of connection of external hardware to the device with Android.
Import of goods to Eshop Prestashop , the update of the store and prices of the goods.
The device for playing music – JukeBox.
Web camera weather Frýdlant.
Servers: network storage, firewall, mail server, web server, etc. .
Managing virtual and physical servers of company Knitva s.r.o. .
Application for the administration of bussines customers and logistics (planning of routes) (CRM).
Measuring of the temperature of bee colonies
Application of cell phones which seeks the traffic routes.
Web application for display of GPS records
Encryption on chip card with technology Java Card OpenPlatform .
Program for monitoring the backup battery (UPS).

Recommendation

Na volné noze

View recommendations from navolnenoze.cz

Listing of recommendations from the portal Na volné noze

Adam Grzelec

I worked with Josef on a small project and I'm very glad with the solutions he delivered. Josef is an expert developer with a reliable knowledge and deep understanding of web technologies.

Jan Kejda

Bc. Josef Jebavý is a great programmer. We are creating together a brand new (quite complex) application for production planning in my company. We have been working together for several months and I can rate his work as fully professional. He works systematically, carefully, pays attention to the smallest detail. He tries his best to meet my requirements, he does not impose his solutions. He brings his own suggestions to the project. He always finds a solution, it has never happened to me that he was not able to meet my request. What I appreciate the most is that he fulfills in time what we agreed on in advance. The application is created without any time delays. Great cooperation, I highly recommend!

Jan Konáš

Seamless communication, managed to quickly get into a large-scale project. I recommend.

LMnet, s.r.o.

We cooperated with Mr. Jebavý on the installation of mail and web server in our company, which deals marginally with the provision of web hosting (technology: Linux, ISP Config, Proxmox). Everything was always by appointment and based on reliable communication. I can recommend.

Jiří Kapínus

An excellent computer programmer, though a bit expensive. He managed to master the project which other programmers from the portal Na volné noze (Self Employed) refused to do as too difficult. Good communication, excellent cooperation, lots of ideas using his own initiatives and also recommendations for the future development. An interesting publishing work in mainly challenging topics in the IT sector. Wide knowledge of both web issues and internet servers. Definitely potential for a long term cooperation in development of challenging projects. I recommend to look at his YouTube channel. A keen cyclist, nature lover and a very likable guy. I like his lifestyle which connects the distance working with travelling and sports. This way, in this dynamic environment, one can keep fresh mind with a proactive and creative attitude.

Marek Popovský

Mr. Jebavý took over our complicated project running at full speed and he mastered it with maximum professionalism. I would like to thank him this way and at the same time I would like to recommend Mr. Jebavý to everyone else who thinks about the use of his services.

Stanislav Drápalík

During the breakdown of our Linux server we turned to Mr. Jebavý with the request for help. Because the breakdown was at the worst time possible, right in the middle of the season and, what is more, at the weekend, the help was urgently needed. Mr. Jebavý answered our call for help immediately with his offer and on Sunday morning the fault on the server was fixed. I can recommend Mr. Jebavý for his speedy and efficient work.

Milan Černík

I am very satisfied with the service offered. I have changed several firms before I found the right one. The long-term cooperation in e-marketing field.

Petr S.

Thank you very much for the obliging and generous attitude, speed and professionalism. The installation of the server was according to my expectation including the necessary setting so that I could administer the server with the help of ISPconfig. The carried-out task: installation of Linux Debian 9.0 at the server HPE ProLiant DL320e, Intel Xeon 1231 (3,4 Ghz) 4C/9T 8MB, 32 GB DDR3 ECC 1600 Mhz installation and configuration: Apache, PHP, Mysql, mailserver, DNS server, ISPConfig. Everything including the final handover was perfect and therefore I can recommend this professional. I am looking forward to further cooperation.

Jan Zítko

Our firm Sievert Consulting s.r.o. has a long-term partnership with Mr. Jebavý, who looks after the administration and maintenance of all hardware parts of our application which serves for the administration and maintenance of the property SW KLID. We can only recommend the cooperation with Mr. Jebavý to those who want to have stress-free business and want to concentrate on their business without loosing time with server administrators. We look forward to many other years of cooperation.

Pavel Halama

In establishing my public notary office I needed to solve the problem of building up a small computer network with a small server, data sharing, distant access to data and their security and storing. The cooperation with Josef Jebavy was professional, fast and practical. Everything works and is still working according my expectations. Josef designed the server according to my needs — he installed a smart device having small consumption including the data storing at the second small device. I can only recommend him.

Jiří Zikeš

I am completely satisfied with our long-term cooperation. He solved the complete deployment of Docker for our integration platform. Thanks to which we are able to automatically scale our solutions and thus serve dozens of clients without any delays or outages. If you need help, advice, or directly looking for a person who would deploy the solution, I recommend it!

Milan Matějček

I needed help and consulting a development environment solution using docker technology. I contacted Mr. Josef Jebavý because I had omly little experience with it. After one morning, I was able to prepare other things myself and helped me compare concepts in my head and how to approach technology. It helped me a lot. I recommend.

Pavol Hejný

I know Josef from several technology conferences (Openalt, Linuxdays), where he has interesting lectures on Linux, server administration, backed technologies in general, hardware or various interesting things, such as video editing. As a fullstack developer with more frontend expertise, I'm often interested in his expertise in technology. Last time, it helped me a lot in solving problems with Apache, a large number of WebSocket connections and the subsequent transition to NGINX.

Milan Hrubý

Excellent and fast work on the completion of our project on the portal www.maniny.cz. I recommend Mr. Jebavý to everyone who is looking for a professional approach and solid behavior.

Tomas M.

Great job as always! Fast and excellent programmer with a lot of knowledge. He was able to complete the project assignment in a short time. What more to say? Best of all, the quality matches the price. If you need help, advice, or you are looking for a person in IT who would quickly and efficiently advise you and deploy a solution, I recommend it! What others don't know, Mr. Jebavý knows and knows! I can only recommend Mr. Jebavý for fast and quality work, as well as his excellent data backup service snapbackuper.com We look forward to the next years of mutual cooperation! Professional approach and solid dealings at 1000%.

Ing. Igor Ďatko

Mr. Josef and I were solving a problem with a slow VPS that we didn't know how to handle ourselves. After just one consultation, he helped us significantly optimize performance. A great expert, I definitely recommend him.

LinkedIn

See recommendations from linkedin.com

Listing of recommendations from the portal linkedin.com

Josef Kvasnica

Pepa is a reliable IT specialist and consultant with extensive experience in the field. He has the greatest experience in the field of DevOps, where he also shares his knowledge through educational content on various platforms. He also has strong experience with Linux operating systems. At the same time, it is necessary to emphasize his overlap in the field of software development. I had the opportunity to collaborate with Pepa on a project where he demonstrated clear abilities and prerequisites for quality development. I appreciate that he is actively interested in modern technologies and at the same time enjoys their theoretical side.

Martin Koníček

Pepa explained to me many business aspects of freelancing, and how he helps clients mainly in business, and only to a lesser extent technically. Even though Pepa is an extraordinary personality, it has no effect on his knowledge of technology, his activity and action, don't be afraid to work with him just because he is not politically correct and is not afraid to say things directly, on the contrary, it will speed up a lot of things.

Jan Malcánek

Mr. Jebavý prepared the servers and deployed the application that we implemented for the client. The cooperation was excellent, Mr. Jebavý set everything up as needed and was helpful in everything that was needed. The application servers are now running smoothly.

Radek Hanek

Josef took care of the servers of the web application in Nette, which I programmed. He handled all configuration modification requests very quickly and in ways that would not limit the users of the application. His rich experience in managing Linux servers is suitable for the smooth running of any web application. He can also suggest process changes that speed up the deployment of code modifications to servers, for example.

Petr Berný

Josef and I had the opportunity to work in the same company. He has always been actively interested in the issue of managing Linux servers, and has always tried to come up with a solution that would bring some benefits and simplification of work to the company and the customer. As an administrator of Linux servers, I can highly recommend him.

Webtrh

Recommendation on webtrh.cz.

Technology

While working on projects, I have learned the following technologies:

AI: Cursor, ClaudeCode, AI API
OS GNU/Linux
Ethernet, WiFi, TCP/IP.
Programming languages: Java (SE, OpenCard , Android) , Bash, SQL, PHP (Nette, Symfony, Composer), Python, C/C++, Kotlin.
HTML, XML, LaTeX.
REST API, integration with: Geis Point, Zásilkovna, Česká pošta Balík do balíkovny B2C, PayU, Fio bank API. SOAP API Zásilkovna, PPL myAPI, API Česká pošta, Geis API, DPD, Shoptet API, Luigi’s Box, Novico/Covetrust SOAP API, Ecomail, Money XML.
Software versioning: SVN, Git.
Automated testing, for example unit testing.
Agile development methodologies such as Scrum.
Administration of Linux servers (I prefer Debian): RAID, Apache, Nginx, Postfix, Dovecot, MySQL, PostgreSQL, SAP HANA, Named, LTSP, Samba, Asterisk, OpenVPN, Openfire, ssh, virtualization Proxmox (Qemu/KVM), ISP Config, Ansible, NodeJS atd.
DevOps: GitLab CI/CD, Docker, Podman, Kubernetes.
Yocto project, Bitbake, embedded Linux.
Troubleshooting, encryption, network and application security.
Microcontrollers: AVR (Arduino), ESP8266, soldering.
ARM single board PC: Raspberry Pi, Banana Pi R1.
Implementation of AI-connected applications.

Soft skills

Communication
Public speaking
Remote work
Swimming
Languages: Czech (native), English (spoken), basics of German and Spanish
Knowledge in the field of tax record keeping, VAT and accounting (according to Czech legislation).

Professional publications

Linux notebook Tuxedo Pulse 15 Gen2 (Root.cz 2023)
Next Cloud (Root.cz 2021)
Series of articles: the Btrfs filesystem (Root.cz 2020)
Warduxere - Arduino with wireless connectivity and low power consumption (magazine Amatérské Radio 2017/02)
The series of articles about the realization of wireless programmable modules (www.root.cz 2016)
The series of articles Banana Pi R1: a small computer with SATA, Wi-Fi and a switch (www.root.cz 2015)
Detection of ascending air flows with the help of temperature sensors (magazine RC Modely 2014/04 )
Special USB adapter with a power supply (magazine Amatérské Radio 2011/06)
Mobile wireless measurement of temperature (magazine Mechanizace zemědělství 2011/06)
Wireless measurement and evaluation using the IQRF platform (magazine Amatérské Radio 2011/01)
WirelessBee – a modern beekeeper's aid (magazine Včelařství 2010/09)

Lectures

I regularly attend conferences not only as a listener but also as a lecturer. Educational lectures at high schools. List of planned and completed conferences.

Personal achievements:

To optimize my finances, I started renting rooms in Prague for short-term stays. For this purpose, I prepared the apartment, studied the laws/bureaucracy and learned how to use platforms like Airbnb and Booking. For these tasks I set up processes and then delegated them. This allowed me to leave for the entire winter while everything continued to run smoothly.
In 2013, I completed 526 hours of sports training, 350 of them on the bike. On weekends I also completed two MTB ½ marathons and provided my own support and service. And all this while being employed.
The rising air current detection project for competition aircraft modelers helped win a medal place several times.
In my spare time, I fully arranged the cooperation of a company and a sports team, including the design and realization of custom sponsorship items (socks with the team logo).
During two bouts of flu I learned to solve a Rubik's cube. In two summers I learned to swim the front crawl very well .
I learned to play the piano myself.

Hobbies:

Cycling, swimming, cooking, informatics, aeroplane modeling, aquaristics, electronics.

Association:

I am a member of GeekLab z.s. and a supporter of OpenAlt.

Certificates:

IT certificate:
Remote work:
Project management :
Lifeguard:
Spanish certificate:
Freediving AIDA4 certificate: