Sassan Torabkheslat Email & Phone Number

Berlin, Germany

Berlin, Berlin, Germany

🚀 Implemented critical enhancements for infrastructure-side applications, ensuring failover and high availability.🔧 Successfully resolved a longstanding issue that had been affecting operations.💻 Implemented improvements for enhanced stability in database connections.🔒 Strengthened infrastructure security measures, contributing to increased efficiency.

Tehran Province, Iran

• Enhance monitoring system (Zabbix) to accept 4K new value per second, 48K nodes, and 3.2M items
• Support and troubleshoot TD-LTE services handover by Ericsson to Company to support more than 50K customers
• Help other technical teams to fix complicated technical issues such as TCP/IP, Routing issues
• Set up Proxy Server for apple devices and PlayStation consoles, that improve 2x or 3x user experiences and decrease 70% of network congestions.
• Held day-to-day meetings with other technical teams and customer-care teams to find bottlenecks, and root causes of problems and see how they can get improved in all situations
• Refactor or improve most of the applications (especially internally developed) based on company needs for the next 5 years

Tehran, Tehran Province, Iran

• Installing an integrated Umbrella monitoring system with Zabbix, Grafana, and many scripts (python, bash) to collect any statistical data, with 2300 nvps, 800 nodes, and 400K items.
• Manage about 900 VMs and 100 physical servers and about 50 Technical Staff with FreeIPA to control access permissions.
• Deployed an Open DNS server to accept more than 80K queries per second with RedHat Enterprise Linux (CentOS)
• Write a few applications (with C++) and scripts to collect data from 50K subscriber
• Build Redhat Virtualization Platform (Ovirt) with 25 physical servers for hundreds of VMs
• Develop a service with gSoap to fetch statistical data with more than 10K CPEs.

Tehran, Tehran Province, Iran

• Set up CICD mechanisms with Git/Gitlab to do 10 updates per second
• Managed a cross-functional team of about 30 frontend and backend developers
• Installation, maintenance, and administration of over 800 virtual machines and 20 physical servers installed at multiple datacenters
• Design and Tune a Mysql Database with about 3TB data to respond to 1.2M queries per secondMonitor about 20 virtual machines with Zabbix
• Tune OS (Performance Tuning) and JVM tuning (Java Runtime Environment Tuning) to handle about 12K established connections with 22K concurrent connections with HaProxy to increase HA (High Availability) to serve.
• Migrate over 2TB data of Oracle database to Mysql

Isfahan

LPIC-1 and LEC Trainer

Tehran

• Maintain and Support Systems and services (24*7)
• Setup Monitoring Systems like Zabbix/Zenoss to monitor and provision server/service needs
• Setup and install Solaris/Linux (Sparc/x86_64)
• Kernel Customization to enable/disable needed features (such as OCFS2 on CentOS 6.4)
• Apache/JBoss/Tomcat/Mysql performance tuning for high-load services
• Setup Varnish (HTTP accelerator) in front of clustered web servers to decrease visitors pressure on the web servers (about 80% hit ratio)

Isfahan-Iran

Service MaintenanceLAMP StackSystem DocumentationAutomation (Scripting)Monitoring System