Josef Jebavy
software developer, Linux server admin and consultant
Czechia • Working area: globalStatus: at your service • Languages: English, Czech
Listed in: Development & Tech
I am a good old-fashioned IT expert who brings the IT base of companies from the dark ages into the 21st century. I have a university degree in IT from the prestigious Czech Technical University in Prague, have worked on dozens of demanding IT projects, have published countless expert articles, yet I still believe in the importance of hands-on experience and tinkering with the technologies I work with.
As a Linux server admin, IT consultant and software developer well-versed in Java, Bash, PHP, Python, SQL and other programming languages or technologies, I can help you to solve complex problems that are far beyond the scope of individual specialists. These are the main areas I can help you with:
- Linux server installation and management — web servers, mail servers, application servers, special-purpose servers, etc.
- Ransomware-proof data backup and recovery — providing a backup service or complete backup implementation to protect your data from ransomware
- Server applications management — mail servers, web applications, open-source solutions and CMS, e-commerce platforms, team collaboration apps, monitoring, web hosting systems, virtualization, etc.
- Custom software (and hardware) development — I have mastered dozens of programming languages and technologies that can be combined to solve new problems. Besides developing common web applications, I’ve been working with IoT devices and embedded systems for years and have published several series of articles about it.
- IT consultancy and analysis — selecting the ideal software or hardware for your company, an analysis of company business processes, IT security audits and risk assessment, etc.
If you need to bring your company’s IT up to speed, or have some atypical IT assignment, I would be delighted to discuss possible solutions and our potential collaboration.
Technologies I work with
- programming languages — Java, Bash, SQL, PHP (Nette, Symfony, Composer), Python
- software release and source code maintenance — Git, GitLab, unit testing
- administration of Linux servers — Debian, Ansible, RAID, Apache, ISPConfig, postfix, dovecot, MySQL, PostgreSQL, named, LTSP, samba, asterisk, openvpn, openfire, ssh, virtualization (VMWare, Proxmox, Qemu/KVM), Docker, NodeJS, etc.; troubleshooting, encryption, network and application security
- ARM single-board PC — Raspberry Pi, Banana Pi R1
- networking — Ethernet, WiFi, TCP/IP
- REST API connections and other technologies (embedded Linux, Yocto Project, LaTeX…)
- agile development with methodologies such as SCRUM
Expert publications
- Btrfs file system (article series for Root.cz, 2020)
- Warduxere: Arduino with wireless connectivity and low power consumption (Amaterske Radio magazine, 2017)
- Warduxere wireless programmable modules (article series for Root.cz, 2016)
- Banana Pi R1: small computer with SATA, Wi-Fi and switch (article series for Root.cz 2015)
- Detection of ascending air flows with the help of temperature detectors (RC Modely magazine, 2014)
- Special USB reduction with the power source (Amaterske Radio magazine, 2011)
- Mobile wireless measurement of temperature (Mechanizace zemedelstvi magazine, 2011)
- Wireless measurement and evaluation with the use of platform IQRF (Amaterske Radio magazine, 2011)
- WirelessBee – modern aid of a beekeeper (Vcelarstvi magazine, 2010)
Expert lectures
- Bitwarden: comfortable and secure password manager (InstallFest 2020 conference)
- BTRFS filesystem and backup (OpenCamp Bratislava conference, 2019)
- Video editing in Linux using SW Kdenlive (InstallFest 2019 conference)
- File system BTRFS lectu at the LinuxDays 2018 and OpenAlt 2018 conference
- Backup by turning on my computer (OpenAlt 2017 conference)
- Single board computer Banana Pi R1 (OpenAlt 2015 conference)
- Arduino Day 2016 in Prague
- a number of educational lectures on high schools
Selected projects and references
- Warduino platform for low-power wireless communication, awarded by the PE-AR
- firmware maintenance and development for the 9300-ENA industrial Linux router
- The study of connecting external IQRF hardware to Android devices
- managing servers and DevOps for SW KLID
- managing virtual and physical servers for Knitva
- migration of servers and applications for Motonet, TOP09 and Potvor.cz
- versatile server installations and management (net store, firewall, mail server, web server)
- API bridge for importing data of weather predictions for Slunecno.cz
- research and development of an embedded IoT router for Rockwell Automation
- development of embedded devices with Linux using Yocto Project
- ongoing development for Dobra miska
- Wireless monitoring network of IoT devices
- Weather station for a detection and analysis of ascending air flows
- WirelessBee for temperature measurements in beehives and bee colonies
- SpojeGUI mobile/embedded app for looking up traffic routes
- Java Card OpenPlatform on-chip encryption implementation
- an app for the administration of company customers and logistics (route planning)
- Wireless Real-time Temperature measurement app for Android
- JukeBox device for playing music
Contact details
Zahradni 660
Jilemnice
514 01
Czech Republic, European Union
| Email: | email@josefjebavy.cz |
|---|---|
| Website: | josefjebavy.cz/en |
| LinkedIn: | josef-jebavy |
| X (Twitter): | josefjebavy |
| Facebook: | josefjebavyit |
| Instagram: | josefjebavy |
| YouTube: | josefjebavy |
Firsthand recommendations
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.
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.
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.