Jan Kortus
Vývojář at O2 Czech Republic
Based in Prague, Czech Republic
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Seniority
Staff
Department
Other
Location
Prague
Industry
Telecommunications
Company size
3.1K
Contact information
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j•••••••@o2.cz
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Background
About Jan Kortus
I am a full stack developer of applications for telecommunication networks. I code in multiple languages, primarily Python, JavaScript, PHP, and HTML/CSS. Recently, I’ve been deploying applications in Docker containers or on virtual machines (VMs). I developed an anti-spoofing firewall/proxy server as a SIP application server. The entire solution is written in form of Docker microservices in Python and deployed on VMs in RHOS. It communicates using multiple protocols with various elements of the telecommunication network (SIP, gRPC, DNS, LDAP, HTTP, HTTPS, WebSocket, etc.), both within our own networks (O2CZ and O2SK) and with other operators. Every event is also sent to the ELK stack. I have thoroughly tested this solution, including stress testing, and fully integrate it into PLMN networks (O2CZ and O2SK) as an application server (AS) over SBC. Currently we forward part of spoofed calls to AI agent: I also write daemons that perform various automated configuration tasks in the telecommunication network, such as configuring BTS into the CS core and configuring emergency servlets in IMS
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