Description **About The Company:** The client is a leading provider of advanced voice communications software, products and productivity solutions for the digital workplace and customer experience. Our innovative products, solutions and services are used by large multinational enterprises and leading tier one operators worldwide. As of today, 50 of Fortune 100 enterprises use client's technology. We are proud to embody the core values of innovation, collaboration, and trust in both our culture and products. We are creating groundbreaking technology utilizing a world\-class, voice AI\-powered Platform that revolutionizes how businesses use voice to communicate, collaborate and service their customers and internal teams. As a key enabler of digital transformation, digital workplaces, and hybrid environments, the client helps businesses find their voice; every business has a voice, the client makes sure it is heard. We are an open, inclusive, and diverse organization, and our employees are at the heart of the great products and services we create. We offer a flexible and collaborative work environment, along with career growth opportunities. About The Role We are seeking an APS Engineer to join the Professional Services / Architecture team. This is a senior technical role that requires broad UC/VoIP knowledge across multiple platforms and hands\-on experience with architecture, design, and deployments. The ideal candidate will have solid Microsoft Teams administration knowledge and strong experience in migrations, upgrades, and integrations between platforms and environments. This is not a support role. Candidates must bring proven, hands\-on expertise and be ready to lead customer projects from start to finish. **Responsibilities:** Lead architecture, design, and implementation of UC/VoIP/Collaboration solutions, including upgrades, migrations, and cross\-platform integrations. **Perform full lifecycle deployments:** requirements gathering, design, configuration, testing, acceptance, and documentation. Work directly with customers and vendors in a consultative, customer\-facing role. Configure and integrate SIP, SBCs, gateways, and cloud telephony systems. Deliver migrations from on\-premise to cloud or from one UC platform to another (e.g., Zoom → Teams, Cisco → Teams, Genesys → cloud). Provide training, documentation, and knowledge transfer to customers and internal teams. Troubleshoot complex VoIP/network issues (signaling, routing, SBCs, security). Ensure projects are delivered on time and aligned with customer expectations. Requirements 5\+ years of experience in UC/VoIP engineering, with hands\-on design, architecture, and deployment (not just support). **Multi\-vendor UC experience:** Cisco, Genesys, Twilio, Zoom, Avaya, 3CX, or similar. **Microsoft Teams Administration experience:** direct implementation, call routing, policies, integrations. Strong SIP expertise and knowledge of related protocols (H.323, MGCP, RTP, TCP/IP). Experience with SBCs and gateways. **General networking knowledge:** TCP/IP, routing, VPNs, security, firewalls. Proven experience in migrations and upgrades (platform\-to\-platform or on\-premise\-to\-cloud). Strong English communication skills and customer\-facing experience. Nice to have AudioCodes SBC hands\-on knowledge. Experience with scripting/automation (Python, Bash). Cloud experience (Azure, AWS, hybrid UC deployments). **Certifications:** Cisco Collaboration, Microsoft Teams Voice, AudioCodes, or equivalent. 5 years