02/12/2026 updated
LF
100 % available
Senior Unified Collaboration Engineer
Hoznayo, Spain
Only remote
B.Sc. Telecommunications EngineeringAbout me
A Professional level Cisco certified Senior Collaboration/Voice Engineer with demonstrated success in the design, implementation of enterprise VoIP networks. Additional experience includes hands on participation in large on prem migration to the cloud Cisco Webex Contact Center and Webex Calling.
Application Programming Interfaces (APIs)AutomationVoIPCustomer Relationship ManagementCall CentersCisco Unified Communications ManagerComputer NetworksVMware ESX ServersH.323 ProtocolInfrastructure ManagementSession Initiation ProtocolsMedia Gateway Control Protocol (MGCP)Network ArchitectureRoutingSystems Integration
Cisco Unified Communications
Expertise in analysis, design, implementation and support of Cisco voice over IP solutions including Call Manager, Unity, Unified Presence, Call Center Express, and IP Gateways
Network Infrastructure Design
Advanced experience in designing and implementing High Availability networks, CUCM, Unity Connection, IM & Presence, and UCCX for multisite voice deployments
Migration and Integration
Specialized knowledge in migrating legacy contact center platforms to Cisco Webex Contact Center and integrating APIs between contact centers and CRM systems
Webex Solutions
Hands-on experience with Webex Calling and Webex Contact Center implementation and configuration
Scripting and Automation
Proficiency in IVR and UCCX application scripting for automated call handling
Virtualization Technologies
Experience deploying Cisco Unified Communications technologies using VMware virtualization technologies including ESXi
IP Telephony Protocols
Hands-on experience with IP Telephony protocols including SIP, H323, and MGCP
Microsoft Teams Integration
Experience with Microsoft Teams Direct Routing and developing solutions to connect existing telephony infrastructure
Voice Gateway Configuration
Technical expertise in analyzing voice and data networks and configuring voice gateways as part of IP telephony systems
Expertise in analysis, design, implementation and support of Cisco voice over IP solutions including Call Manager, Unity, Unified Presence, Call Center Express, and IP Gateways
Network Infrastructure Design
Advanced experience in designing and implementing High Availability networks, CUCM, Unity Connection, IM & Presence, and UCCX for multisite voice deployments
Migration and Integration
Specialized knowledge in migrating legacy contact center platforms to Cisco Webex Contact Center and integrating APIs between contact centers and CRM systems
Webex Solutions
Hands-on experience with Webex Calling and Webex Contact Center implementation and configuration
Scripting and Automation
Proficiency in IVR and UCCX application scripting for automated call handling
Virtualization Technologies
Experience deploying Cisco Unified Communications technologies using VMware virtualization technologies including ESXi
IP Telephony Protocols
Hands-on experience with IP Telephony protocols including SIP, H323, and MGCP
Microsoft Teams Integration
Experience with Microsoft Teams Direct Routing and developing solutions to connect existing telephony infrastructure
Voice Gateway Configuration
Technical expertise in analyzing voice and data networks and configuring voice gateways as part of IP telephony systems
Experience
Professional experience10+ years
Freelancer since2020
Languages
EnglishFluentSpanishNative speaker
Project history
Lead Engineer for multi-site migration from Cisco on premise call control to Webex Calling solutions, implement Local Gateway configurations, lead migration of legacy contact center platforms to Cisco Webex Contact Center, and lead multi-site upgrades based on Cisco Unified Call Manager and related systems
Engineer, configure and lead the design, configuration and deployment of Unified Communications including Video, VoIP and other network infrastructure devices, recommend strategies and policies, develop technical architecture and physical design of networks
Engineer, configure and lead the design, configuration and deployment of Unified Communications, consult and assess technical requirements, convert requirements into actionable scopes of work, facilitate design reviews for proposed architectures