Alexandru Ionut Raducu

Troubleshot various networking and end-to-end connectivity issues in a multi-vendor environment, including Cisco, Juniper, and Fortinet. Created documentation and procedures for day-to-day tasks. Deployed new configurations on networking devices to align with security best practices and upgraded equipment in response to emerging threats. Set up firewall rules to block/allow traffic at the request

Researched open source web applications for security vulnerabilities, discovering CVEs like CVE-2025-32390 and CVE-2025-47781. Documented vulnerability discovery processes and details on a personal blog. Built custom tools in Python for assessed applications and other useful scripts.

Took ownership of complex cases escalated from the L1 team and mentored L1 team members. Contributed to the improvement of documentation, knowledge base (KB), and internal troubleshooting tools. Managed cases for customers with Advanced Contracts.

Performed quality assurance for Palo Alto firewalls and Panorama. Collaborated closely with the engineering team to isolate and resolve defects in a timely manner. Contributed to the quality strategy of products by developing and maintaining the new Quality Release Gate process.

Provided support for Juniper security products including SRX branch, SRX high end, and vSRX. Troubleshot complicated hardware and software issues, replicating customer environments and network problems in the lab. Assisted customers with implementing new features on security devices when not functioning accordingly.

Performed surveillance and troubleshooting of alarms, events, and faults in the radio access network. Contributed to site migration activities. Monitored key performance indicators for the radio access network.

Monitored and troubleshot incidents received from Backbone IP, CBU, and 3G networks. Cooperated with Support, NOC-IP, NOC-CBU, Backbone, and Infrastructure teams to resolve network failures. Notified carriers of national and international partners in case of damage on leased lines.

Activities and societies: Relevant coursework: Networking, Programming, Wired and Wireless Telecommunications, Operating Systems

Studied Telecommunications, Networking, and Software, covering a wide range of topics. Relevant coursework included Networking, Programming, Wired and Wireless Telecommunications, and Operating Systems.