Ivan Hristov Email and Phone Number

• Diagnosing and resolving diverse VoIP-related issues with precision andefficiency.• Establishing and maintaining strong relationships with vendors such as AT&T,Verizon, and T Mobile to achieve optimal results.• Orchestrating and cooperating with multifaceted teams including FE, BE, Core,Proxy, and Network to accomplish goals.• Designing and implementing scripts to streamline and automate tasks, boostingproductivity and accuracy.• Developing comprehensive alerting systems and interactive Grafana dashboardsutilizing Prometheus.

• I took part in the full lifecycle of the production and implementation of PBX andCC features, including dialers, queues, IVRs, voicemails, CDRs, transfers, andmore.• Utilized Asterisk development interfaces to achieve optimal results.• Adhered to Agile methodologies with precision and rigor.

• Provided team members with mentorship, ensuring control, quality, and optimalperformance.• Successfully recreated customers' network configurations in an internal lab,expertly reproducing and resolving issues.• Expertly diagnosed and resolved issues related to VoIP protocols such as SIP,H323, MGCP, SCCP, and ISDN.• Experienced in multi-tenant CUBE configurations, high availability setups, dial-plan design and troubleshooting.• Skilled in all aspects of CUCM/CUCME, including configuration, implementation.